Friday, November 30, 2007

Gl 185 AB

Star type
g A: K7 V J
g B: M

Distance from Earth
g 25.5 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; 33.6%; NA
g B: NA; 19.5%; NA

Brightness (xSol)
g A: 2.249%
g B: 0.331%

Metallicity
g A: NA
g B: NA

Comparison to Sol
g A: NA
g B: NA

Picture of star
g A: NA
g B: NA

Star system features
g NA

Known planets
g A: NA
g B: NA

Habitable zone
g A: Probably not luminous enough to support an Earth-like planet in a Sol-type habitable zone
g B: NA

Orbital map
g Separated by 11.9 AUs

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Lepus

Other names
g A: HD 32450; HIP 23452; BD -21° 1051 A; YPC 1135.00; Vys 112A; LTT 2151 A
g B: BD -21° 1051 B; Vys: 112B

Sci-fi mentions
g NA

Get your SF book manuscript edited

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Thursday, November 29, 2007

Gliese 382

Star type
g M2V

Distance from Earth
g 25.48 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; NA; NA

Brightness (xSol)
g 1%

Metallicity
g NA

Comparison to Sol
g See chart (Similar to Proxima)

Picture of star
g NA

Star system features
g May have a companion star at 200 AUs

Known planets
g NA

Habitable zone
g 0.10 A.U.s

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Luyten 968-22: 2.42274 ly (this system probably is another dozen or so light years farther away)
g Bonner Durchmusterung +1°2447: 3.25691 ly
g Wolf 358: 6.66515 ly

Map locating star system
g NA

Location in Earth sky
g In constellation Sextans

Other names
g HIC 49986
g LTT 3734
g SAO 137411
g McC 569
g BD -3°2870

Sci-fi mentions
g NA

Get your SF book manuscript edited

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Wednesday, November 28, 2007

Luyten 362-81

Star type
g DA5 VII

Distance from Earth
g 25.44 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 50%; NA

Brightness (xSol)
g 0.0453%

Metallicity
g NA

Comparison to Sol
g NA

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g GJ 915
g LTT 9857
g LP 988-88
g L 362-081
g BPM 45338

Sci-fi mentions
g NA

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Tuesday, November 27, 2007

Luyten 991-14

Star type
g M2V

Distance from Earth
g 25.43 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 39%; NA

Brightness (xSol)
g 4.74%

Metallicity
g NA

Comparison to Sol
g See illustration (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g See map

Location in Earth sky
g In constellation Serpens Cauda

Other names
g GJ 701, BD-03 4233, LHS 3356

Sci-fi mentions
g NA

Get your SF book manuscript edited

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Monday, November 26, 2007

Gl 686

Star type
g dM1

Distance from Earth
g 25.31 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 24.8%; NA

Brightness (xSol)
g 7.638%

Metallicity
g NA

Comparison to Sol
g NA

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Draco

Other names
g HIP 86287; BD +18° 3421; YPC 4009.00; Vys 169; LHS 452

Sci-fi mentions
g NA

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Sunday, November 25, 2007

Gliese 1093

Star type
g M7V

Distance from Earth
g 25.3 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 12%; NA

Brightness (xSol)
g 0.132%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Gemini

Other names
g LHS 223
g G 109-35

Sci-fi mentions
g NA

Saturday, November 24, 2007

Vega

Star type
g A0

Distance from Earth
g 25.3 ly

Star Service No.
g NA

Age
g Between 386 and 511 million years, or up to about half its expected total main sequence life span. May be close to even 600 million years. After leaving the main sequence, Vega will pass through a red giant stage before condensing down to become a white dwarf.

Diameter/Mass/Temp (xSol)
g 307%; 315.1%; 9500 K (17,900 F at poles; cooler at equator)

Brightness (xSol)
g 5084%

Metallicity (xSol)
g 63%; an unusually low abundance of the elements that have a higher atomic numbers than helium

Comparison to Sol
g See illustration

Picture of star
g See picture

Star system features
g Historically, Vega served as the pole star at about 12,000 BCE and will do so again at around 14,000 CE is rotating rapidly with a velocity of 274 km/s at the equator. This is causing the equator to bulge outward because of centrifugal effects, and, as a result, there is a variation of temperature across the star's photosphere that reaches a maximum at the poles.

Known planets
g Vega has a circumstellar disk of dust; this dust is likely the result of collisions between objects in an orbiting debris disk, which is analogous to the Kuiper belt in the Solar System Irregularities in Vega's disk also suggest the presence of at least one planet in orbit. The outer belt 10 times farther away from its host star than the inner belt. As for the large gap between the two belts, it is likely there are several undetected planets, Jupiter-sized or smaller, creating a dust-free zone between the two belts. A good comparison star system is HR 8799, which has four known planets that sweep up the space between two similar disks of debris.

Habitable zone
g Centered at a radius of about 5.5 AU. The orbital period for a hypothetical planet at that distance would be 8.9 years. From the perspective of an observer on this hypothetical planet, the Sun would appear as a faint 4.3 magnitude star in the Columba constellation. Thezone would extend a maximum of 7.130 A.U.s; such a planet would orbit Vega in 10.8658 years. The tidal index in this zone is 0.008470, and the angular size of star in the sky is 0.235599 degrees.

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g BD +32°3326: 4.19557 ly
g Gliese & Jahreiss 1230: 6.16792 ly
g Mu Herculis: 7.29942 ly (G5 IV)
g Giclas 203-47: 7.45231 ly
g Bonner Durchmusterung +43°2796: 7.78355 ly
g Kuiper 79: 8.23707 ly
g Gliese 745: 9.6094 ly

Map locating star system
g See stellar map

Location in Earth sky
g This star lies at a vertex of a widely-spaced asterism called the Summer Triangle, which consists of the zero-magnitude star Vega in the constellation Lyra and the first-magnitude stars Deneb in Cygnus and Altair in Aquila. This formation is the approximate shape of a right triangle, with Vega located at its right angle. The Summer Triangle is recognizable in the northern skies for there are few other bright stars in its vicinity. It is the sky's fifth brightest star.

Other names
g Alpha Lyrae, 3 Lyrae, Gl 721, HD 172167, BD +38°3238, HIC 91262, SAO 67174, FK5 699, HR 7001, LTT 15486

Sci-fi mentions
g In Robert A. Heinlein's novel Have Space Suit—Will Travel, Vega hosts the planet of an advanced civilization which is the local representative and overseer of the Three Galaxies federation, and the curator of humanity after its discovery by the Three Galaxies.
g In Isaac Asimov's Foundation trilogy, Vega, or the Vegan planetary system, is understood to be an important business world, above all exporting Vegan tobacco. When Terminus, the home planet of Foundation, is isolated from the culture and sophistication of the innermost parts of the Galaxy, there is no more "mild Vegan tobacco" available, a fact repeatedly referred to by the characters of the first novel.
g In Carl Sagan's science fiction novel Contact , Earth receives a message from an extraterrestrial transmitter array orbiting Vega. In the 1997 film Contact, a transmission is received from the vicinity of Vega and the protagonist Ellie Arroway is transported there via wormhole.
g In James Blish's Cities in Flight series, the Vega system is home to a civilization called the Vegan Tyranny, which the Earthmen must defeat before expanding out into the galaxy.
g In Star Trek, there are several references to a human colony situated in the Vega system. In his novelisation of the Original Series episode "Tomorrow is Yesterday", James Blish mentions the Vegan Tyranny from his Cities in Flight novels.
g In Jack Vance's series, the Demon Princes, Vega is the parent star of the planets Aloysius, Boniface and Cuthbert. Aloysius, in particular, features prominently in the five books.
g In Roger Zelazny's book This Immortal, the Vegans are a species of humanoid aliens who use the Earth as a vacation resort.
g In James H. Schmitz's Agent of Vega, humans settled round Vega are building a new and better empire to replace the original fallen Empire of Earth.
g In Ivan Efremov's book Andromeda Nebula, expedition from Earth has visited Vegan system and found it to be lifeless.
g In the Perry Rhodan series, book 5 The Vega Sector, book 6 The Secrets of the Time Vault, and book 7 Fortress of the Six Moons, Perry Rhodan and his crew fly to Vega and help the inhabitants of the 8th planet defeat the invaders from "Topid". In the process they discover artifacts left by a very advanced race from whom they get the secret of immortality.
g In H. G. Francis's german serial of books and audio plays Commander Perkins the main opponent alien race is located on Vega and called Vegans.
g In the DC Comics series Omega Men, the Vega star system is where a war among alien races takes place. One of its planets, Tamaran is home to Teen Titan member Starfire/Princess Koriand'r, who belonged to the royal family that governed her homeworld until her renegade sister Blackfire/Komand'r abducted and enslaved her.
g In a Commodore 64 computer game named HOMER, part of the story is centred on human migration to Vega.
g In the Traveller role playing game, a planetary system near Vega is inhabited by aliens called Vegans. They govern an autonomous region within the Imperium several parsecs large around Vega.
g In the Chris Roberts Space simulation game Wing Commander, the story takes place in a region of the galaxy known as the Vega Sector (its sector star is Vega), and the campaign of the Kilrathi War taking place there is known as the Vega Campaign.
g In the computer game FreeSpace 2, Vega is a colonized system. The node connecting Vega to Capella was collapsed during the Shivan invasion.
g In the computer games Frontier: Elite II and Frontier: First Encounters, Vega is a tourist trap thanks to the humid jungle planet (named Tracy's Haven) within the system. Tracy's Haven is known for its scenery and for its dangerous wildlife. The system itself is a Federation member. Considering that it is a politically stable system, Vega is remarkably lax in what goods it allows for legal sale. Goods that would normally be banned elsewhere in the Federation (most notably live animals and weapons) can be freely purchased or bought here. Only slaves, narcotics and nerve gas are banned in the Vega system.
g Virga, a balloon colony 5,000 miles in diameter, orbits at outskirts of Vega star system in Karl Schroeder's novel "The Sunless Countries"

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Gliese 3417

Star type
g M7V

Distance from Earth
g 25.28 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 16%; NA

Brightness (xSol)
g 0.390%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g NA

Sci-fi mentions
g NA

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Thursday, November 22, 2007

Wolf 718

Star type
g K7 V

Distance from Earth
g 25.18 ly

Star Service No.
g NA; 56%; NA

Age
g 9.34 Gyr

Diameter/Mass/Temp (xSol)
g NA; 42.9%; NA

Brightness (xSol)
g 11.4%

Metallicity
g NA

Comparison to Sol
g See chart (similar to GJ 205)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Ophiuchus

Other names
g GJ 673, BD+02 3312, Hip 85295, HD 157881

Sci-fi mentions
g NA

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Wednesday, November 21, 2007

Fomalhaut

Star type
g A3v

Distance from Earth
g 25.07 ly

Star Service No.
g NA

Age
g NA

Diameter/
Mass/Temp (xSol)
g 171.9%; 230%; NA

Brightness (xSol)
g 175.9%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Sirius)

Picture of star
g See picture

Star system features
g Has young dust disk that is positioned head-on toward Earth. See graphic illustration.

Known planets
g Both the inner and outer edges of the thin, dusty disc have very sharp edges. This suggests the dust particles in the disc are kept within the disc by the gravitational effect of two planets,one closer to the star than the disc and one more distant. The ring’s width is about 16 times the distance from the Sun to the Earth, and is only one-seventh as thick as it is wide. The ring is about 140 times the Sun-Earth distance from the star (Pluto is about 40 times more distant from the Sun than the Earth), so the planets must be very cold.
g Inner planet: Probable size is larger than Mars but no larger than a few times the size of the Earth.
g Outer planet: As with its sister planet, probable size is larger than Mars but no larger than a few times the size of the Earth.
g Fomalhaut b: At outer edge of dusty disc, probably completely shrouded by dust. No more than three times mass of Jupiter, planet is thought to have a Saturn-like ring. Previously thought to be a free-floating dust cloud, the planet's existence is controversial. It follows an oddball orbit of wild extremes between its closest and farthest points from the parent star and appears to cross through a vast minefield of dusty debris, coming within 4.6 billion miles of its star at the closest point in its orbit then swinging way out to a point about 27 billion miles away at the farthest point in a 2,000-year-long orbit

Habitable zone
g 4.194 A.U.s; such a planet would orbit the star once every 5.66327 Earth years. The tidal index in the HZ is 0.031179 with the angular size of star in sky 0.218452 degrees.

Orbital map
g NA

View from star
g TW Piscis Austrini would appear as a magnitude -0.5 star in sky

Nearby stars
(Star systems with 10 light years)
g TW Piscis Austrini: 0.871377 ly (K5e V)
g CD -23°17699: 3.53357 ly (K7 V)
g FK Aquarii: 5.56838 ly
g Luyten 788-34: 6.28752 ly
g GJ 2005: 8.06826 ly
g Luyten 362-81: 8.13867 ly

Map locating star system
g NA

Location in Earth sky
g In constellation Piscis Austrinus

Other names
g Alpha Piscis Austrini; Alpha Psa
g 24 Piscis Austrini
g Gl 881
g HD 216956
g CD -30°19370
g HIC 113368
g SAO 191524
g FK5 867
g HR 8728
g NSV 14372
g LTT 9292

Sci-fi mentions
g Fomalhaut III is planet in short story “The Dead Lady of Clown Town” by Cordwainer Smith; the human nurseries are kept far underground because of chancy radiation and fierce weather
g Fomalhaut is a star system in Joe Haldeman’s novella “The Frontier War"
g In Damon Knight’s “Eripmov,” a planet around this star is home to a race of cellulose vampires
g In Frederik Pohl's "The High Test,' is the home of an alien species with two heads, scales and feathered tails that is supsected of planning an invasion of Cassiopeia 43-G

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Tuesday, November 20, 2007

Luyten 399-68

Star type
g M3.5V

Distance from Earth
g 24.99 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 21%; NA

Brightness (xSol)
g 0.516%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Centaurus

Other names
g GJ 480.1
g LHS 340

Sci-fi mentions
g NA

TW Piscis Austrini

Star type
g K4-5 Vpe

Distance from Earth
g 24.91 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 81% to 90.3%; NA

Brightness (xSol)
g 13% increasing to 14.2%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g Flare star

Known planets
g NA

Habitable zone
g 0.360 A.U.s; angular size of star in sky of HZ planet: 1.336403 degrees

Orbital map
g NA

View from star
g Fomalhaut would appear as a magnitude -6 star

Nearby stars
(Star systems with 10 light years)
g Fomalhaut: 0.871377 ly
g Cordoba Durchmusterung -23°17699: 4.39475 ly ( K7 V)
g FK Aquarii: 6.29322 ly
g Luyten 788-34: 6.85596 ly
g Luyten 362-81: 7.54826 ly
g Gliese & Jahreiss 2005: 8.20909 ly

Map locating star system
g NA

Location in Earth sky
g In constellation Pisces Austrinus

Other names
g Gliese 879
g HD 216803
g CD -32°17321
g HIP 113283
g SAO 214197
g UGPMF 584
g HR 8721
g TW Psa

Sci-fi mentions
g NA

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Sunday, November 18, 2007

Ross 490

Star type
g M1V

Distance from Earth
g 24.88 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 42%; NA

Brightness (xSol)
g 4.79%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Virgo

Other names
g BD+11 2576
g GJ 514
g LHS 352

Sci-fi mentions
g NA

Saturday, November 17, 2007

Gl 666 AB

Star type
g A: G8V
g B: K7-M0V

Distance from Earth
g 24.73 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Radius/Mass/Temp (xSol)
g A: 58%; 71.5%; 5305 K
g B: NA; 31.3%; NA

Brightness (xSol)
g A: 30.94%
g B: 1.7%

Metallicity
g A: 45%
g B: Extremely metal poor

Comparison to Sol
g A: NA
g B: NA

Picture of star
g A: NA
g B: NA

Star system features
g Pair belong to the old disk population

Known planets
g A: NA
g B: NA

Habitable zone
g A: NA
g B: NA

Orbital map
g Two stars share a highly elliptical orbit that takes several centuries to complete. The estimates of the period range from 693 to 2,200 years, and the average separation of the two stars is about 210 AUs.

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In the constellation Ara

Other names
g A: HD 156274; HIP 84720; CD -46 11370; YPC 3919; LHS 444; 41 Arae A; 41 G. Arae A; HR 6416; LTT 6886; GCTP 3919.00; SAO 227816; NSV 21372; CP(D)-46 8513; BSO 13; LPM 636; LFT 1334, 41 Ara
g B: 41 Arae B; 41 G. Arae B; Gl 666 B; LHS 445

Sci-fi mentions
g A: NA
g B: NA

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Luyten 1813-21

Star type
g M3.5V

Distance from Earth
g 24.67 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 14.1%; NA

Brightness (xSol)
g 0.1065%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g 0.032 A.U.s

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Stein 2051: 7.7904 ly
g Luyten 1813-21 is a rather isolated star with its nearest neighbor a mere M-class star

Map locating star system
g NA

Location in Earth sky
g In constellation Camelopardalis

Other names
g Giclas 192-13
g GJ 3378
g LHS 1805
g LTT 11755
g LP 86-137
g L 1813-21

Sci-fi mentions
g NA

Friday, November 16, 2007

Mu Cassiopeiae AB

Star type
g A: G5 V1
g B: M5 VI (subdwarf)

Distance from Earth
g 24.63 ly

Star Service No.
g NA

Age
g A: 7.9 by
g B: NA

Diameter/Mass/Temp (xSol)
g A: 73.9%; 75%; 5390 K
g B: NA; 20%; NA

Brightness (xSol)
g A: 42.5%
g B: 0.198%

Metallicity
g A: 22%; metal poor
g B: NA

Comparison to Sol
g A: See chart (similar to Alpha Centauri B)
g B: See chart (similar to Proxima)

Picture of star
g A: NA
g B: NA

Star system features
g NA

Known planets
g A: NA
g B: NA

Habitable zone
g A: 0.652 A.U.s; orbital period is 221.929 days; tidal index is 2.70864; angular size of star in sky is 0.604190 degrees.
g B: 0.0445 A.U.s; orbital period is 7.65851 days; tidal index is 2274.53.

Orbital map
g Stars A and B orbit one another once every 21.43 years; their periastron distance is 0.548 A.U.s and apastron distance is 2.262 A.U.s.

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Eta Cassiopeiae: 5.43002 ly (G3 V)
g Wolf 46: 5.55344 ly (K5 V)
g Wolf 47: 5.8651 ly
g Bonner Durchmusterung +56°2966: 7.23232 ly (K3 V)
g Bonner Durchmusterung +70°68b: 8.49495 ly
g BD +63°238 : 9.37538 ly (K0 V)

Map locating star system
g NA

Location in Earth sky
g In constellation Cassiopeiae
Other names
g 30 Cassiopeiae
g Gl 53 AB
g HD 6582
g BD +54°223
g LHS 8
g HIC 5336
g SAO 22024
g FK5 1030
g HR 321 AB
g NSV 405
g LTT 10400
g mu Cas AB

Sci-fi mentions
g NA

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Wednesday, November 14, 2007

Ross 556

Star type
g M3.5Ve

Distance from Earth
g 24.63 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 30%; NA

Brightness (xSol)
g 2.1% (flare star)

Metallicity
g NA

Comparison to Sol
g See chart (similar to Kapteyn)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Aries

Other names
g GJ 109
g AC+25 7918
g LHS 1439
g VX Arietis

Sci-fi mentions
g NA

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Honoring the Past, Inspiring the Future

Tuesday, November 13, 2007

BS 2721

Star type
g G0 V

Distance from Earth
g 24.63 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 105%; NA

Brightness (xSol)
g 139%

Metallicity
g NA

Comparison to Sol
g NA

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Lynx

Other names
g GJ 1095
g HD 55575
g HIP: 35136
g BD: +47° 1419
g YPC: 1687.00

Sci-fi mentions
g NA


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Monday, November 12, 2007

GJ 1224

Star type
g M4.5 V

Distance from Earth
g 24.58 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 16%; NA

Brightness (xSol)
g 0.0375% (flare star)

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g 0.013 A.U.s (visual comfort zone)

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Bonner Durchmusterung -3°4233: 5.6951 ly
g 36 Ophiuchi: 7.84687 ly (class K1e V)
g Wolf 629: 8.10413 ly
g Bonner Durchmusterung +2°3312: 8.86458 ly (class K7 V)
g Melbourne Observatory 4: 9.05027 ly (class K3 V)
g Wolf 630: 9.05959 ly

Map locating star system
g NA

Location in Earth sky
g In constellation Serpens Cauda

Other names
g G 154-44; LHS 3359; GJ 1224

Sci-fi mentions
g NA

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Sunday, November 11, 2007

LHS 1070 ABCD

Star type
g A: M5.5 V
g B: M8.5 V
g C: M9.2 V
g D: M V

Distance from Earth
g 24.46 ly

Star Service No.
g NA

Age
g A: NA
g B: NA
g C: NA
g D: NA

Diameter/Mass/Temp (xSol)
g A: NA; 5.3%; NA
g B: NA; 8%; NA
g C: NA; 8%; NA
g D: NA; NA; NA

Brightness (xSol)
g A: 0.0034% (flare star)
g B: NA
g C: NA
g D: NA

Metallicity
g A: NA
g B: NA
g C: NA
g D: NA


Comparison to Sol
g A: See chart (similar to Proxima)
g B: NA
g C: NA
g D: NA

Picture of star
g A: NA
g B: NA
g C: NA
g D: NA

Star system features
g NA

Known planets
g A: NA
g B: NA
g C: NA
g D: NA

Habitable zone
g A: 0.0058 A.U.s
g B: NA
g C: NA
g D: NA

Orbital map
g NA

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g Luyten 362-81: 7.28827 ly
g Fomalhaut: 8.06826 ly
g TW Piscis Austrini: 8.20909 ly (class K5e V)
g Eggen/Greenstein white dwarf 246: 8.36004 ly
g Heintz 299: 8.58178 ly
g CD -23°17699: 8.74091 ly (class K7 V)

Map locating star system
g NA

Location in Earth sky
g In constellation Sculptor

Other names
g A-D: GJ 2005 ABCD
g A: LP 881-64

Sci-fi mentions
g NA

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Saturday, November 10, 2007

Beta Hydri

Star type
g G1

Distance from Earth
g 24.38 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g 166%; 133%; NA

Brightness (xSol)
g 362.4%

Metallicity
g 67%

Comparison to Sol
g See chart (similar to Sun)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g 1.904 A.U.s; angular size of star in sky would be 0.464839 degrees. Probability of a habitable planet: 3.7%

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Luyten 49-19: 4.51395 ly (class K V-VI)
g Cape Photographic Durchmusterung -68°41: 5.06908 ly (class late K)
g Zeta Tucanae: 6.71568 ly (class F9 V)
g Delta Pavonis: 9.32339 ly (class G8 V)
g P Eridani: 9.97911 ly (class K2 V)

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g Bet Hyi; bet Hyd
g HR 98
g Gl 19
g Hip 2021
g HD 2151
g CD-77 15
g CP(D)-77 16
g SAO 255670
g FK5 11
g LHS 6
g LTT 226
g LPM 22
g LFT 43

Sci-fi mentions
g Known as "Borka" in the "Star Trek" universe. Borka VI was the site of a neuropsychology seminar attended by Deanna Troi in "Star Trek: The Next Generation" episode "Face of the Enemy."
g An intelligent species equal in technology to Earth's mid 20th century exists on cloud-shrouded Beta Hydri IV in Robert Silverberg's "The Man in the Maze"



107 Piscium

Star type
g K1 V

Distance from Earth
g 24.36 ly

Star Service No.
g NA

Age
g 6 Gyr

Diameter/Mass/Temp (xSol)
g 96.3%; 89%; 5200 K

Brightness (xSol)
g 37%

Metallicity
g 63%

Comparison to Sol
g See chart (similar to Alpha Centauri B)

Picture of star
g NA

Star system features
g NA

Known planets
g None; definitely no planets in torch orbit

Habitable zone
g 0.623 A.U.s; such a planet would orbit star every 202.275 days; angular size of star in sky would be 0.823596 degrees. Porto de Mello lists it as one of 13 nearby astrobiologically interesting stars.

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Catalogue Astrographique +25°7918: 6.52768 ly
g Bonner Durchmusterung +6°398: 7.7992 ly; (habitable K3 V)
g Bonner Durchmusterung +4°123: 8.42785 ly; (habitable class K2 V)
g Catalogue Astrographique +3°2259-31: 8.59696 ly
g Luyten 1305-10: 9.48781 ly

Map locating star system
g NA

Location in Earth sky
g In the northeastern part (01:42:29.76+20:16:06.62, ICRS 2000.0) of Constellation Pisces, the Fish, northwest of Sheratan (Beta Arietis) and southeast of the Triangulum Galaxy (M33)

Other names
g Gliese 68
g BD +19°279
g HIP 7981
g LHS 1287
g HR 493
g HD 10476
g SAO 74883
g NSV 600
g 107 Psc
g CCDM J01425+2016A
g GC 2080
g GCTP 356
g IDS 01371+1947 A
g LFT 153
g LTT 10596
g NLTT 5685
g PPM 91014
g WDS 01425+2016A

Sci-fi mentions
g In "Absolution Gap," a novel by Alastair Reynolds, The 107 Piscium system has a gas giant named Haldora and a habitable moon named Hela, which is colonized by humans in the 27th and 28th centuries.
g Known as the Feidlech (Aske) System in the ArcBuilder Universe.

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Friday, November 9, 2007

Wolf 25

Star type
g K1-2 Ve

Distance from Earth
g 24.33 ly

Star Service No.
g NA

Age
g Perhaps up to 10 Gyr

Diameter/Mass/Temp (xSol)
g 88.2; 83%; NA

Brightness (xSol)
g 24.5%

Metallicity
g 45% at best

Comparison to Sol
g See chart

Picture of star
g NA

Star system features
g A ship traveling at 95% the speed of light would need about 50 Earth years to reach star (given acceleration and decleration); only 13 years would pass aboard the spacecraft, though.

Known planets
g NA

Habitable zone
g 0.495 AUs. Star in sky of planet in HZ would appear to an observer on the surface of said planet at 0.950453 degrees (The Earth's sun subtends an angle of about 0.5 degrees). Planet probably would be tidally locked. Porto de Mello lists it as one of 13 nearby astrobiologically interesting stars.

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Catalogue Astrographique +3°2259-31: 7.42097 ly
g Bonner Durchmusterung +1°4774: 7.48943 ly
g 107 Piscis: 8.42785 ly (class K1 V)
g Gliese & Jahreiss 1286: 8.56544 ly
g Giclas white Dwarf 806: 9.72553 ly
g EQ Pegasi: 9.95909 ly

Map locating star system
g See stellar map

Location in Earth sky
g In constellation Pisces

Other names
g Gliese 33
g BD +4°123
g LHS 121
g HIP 3765
g SAO 109471
g HD 4628
g FK5 1019
g HR 222
g LHS 121
g LTT 10285
g LFT 73
g Hei 202

Sci-fi mentions
g In Joe Haldeman's novel "Starbound," humanity sends the ship "ad Astra" to this solar system, where they believe the Others live.

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Wednesday, November 7, 2007

Luyten 788-34

Star type
g M4V

Distance from Earth
g 24.32 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 17%; NA

Brightness (xSol)
g 0.193% (flare star)

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In constellation Aquarius

Other names
g Gliese 4274
g LHS 3799
g LTT 9001
g LP 820-12

Sci-fi mentions
g NA

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