Tuesday, October 30, 2007

HR 753 ABC

Star type
g A: K3V
g B: M3.5 V
g C: M7 V

Distance from Earth
g 23.51 ly

Star Service No.
g NA

Age
g A: Young star
g B: NA
g C: NA

Diameter/Mass/Temp (xSol)
g A: NA; 81%; 5100 K
g B: NA; 21%; NA
g C: NA; 8.2%; NA

Brightness (xSol)
g A: 24.6123%
g B: 0.1167%
g C: 0.019%

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

Comparison to Sol
g See chart (Stars B and C similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g A: Unlikely that hot Jupiters orbit star
g B: NA
g C: NA

Habitable zone
g A: Porto de Mello lists it as one of 13 nearby astrobiologically interesting stars
g B: NA
g C: 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 Cetus

Other names
g A: LTT 10858
g A-B: Gliese 105 ABC
g B: LTT 10859
g B: LHS 16
g A-C: HR 753 ABC
g Hip 12114
g A: HD 16160

Sci-fi mentions
g NA

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Gliese 809 AB

Star type
g A: M0 Ve
g B: M? V

Distance from Earth
g 22.98 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; 32.2%; NA
g B: NA; NA; NA

Brightness (xSol)
g A: 1.89%
g B: NA

Metallicity
g A: NA
g B: NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g NA

Star system features
g NA

Known planets
g A: NA
g B: NA

Habitable zone
g A: NA
g B: NA

Orbital map
g NA

View from star
g A: NA
g B: NA

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

Map locating star system
g NA

Location in Earth sky
g In constellation Cepheus

Other names
g BD+61 2068 AB
g A: LHS 3595

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

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Sunday, October 28, 2007

Steph 538

Star type
g dM3

Distance from Earth
g 22.96 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 14.5%; NA

Brightness (xSol)
g 0.1157%

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 WD 0552-041: 7.6 ly

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g Nl 471 AB
g Hip 23418
g LP 476-207
g Rob 285

Sci-fi mentions
g NA

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Ross 619

Star type
g M4 V

Distance from Earth
g 22.81 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 15%; NA

Brightness (xSol)
g 0.0306%

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 Cancer

Other names
g LHS 35; Gl 299

Sci-fi mentions
g NA

Saturday, October 27, 2007

Gliese 667 ABCD

Star type
g A: K3-4V
g B: K5V
g C: M2.5
g D: NA

Distance from Earth
g 22.74 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: 76%; 75%; NA
g B: 70%; 65%; NA
g C: 42%; 20.1; NA
g D: NA; NA; NA

Brightness (xSol)
g A: 13.7%
g B: 6.1%
g C: 0.37%
g D: NA

Metallicity
g A: 26%
g B: NA
g C: NA
g D: NA

Comparison to Sol
g A: NA
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: GJ 667Ca - System might also contain a gas-giant planet and an additional super-Earth with an orbital period of 75 days. However, further observations are needed to confirm them.
g C: GJ 667Cb - Planet of about six Earth-masses (0.018 Jupiter-Masses) orbits around 0.05 AUs, completing revolution in 7.2 days
g C: GJ 667Cc - with an orbital period of 28.15 days and a minimum mass of 4.5 times that of Earth. It receives 90 percent of the light that Earth receives. However, because most of its incoming light is in the infrared, a higher percentage of this incoming energy should be absorbed by the planet. When both these effects are taken into account, the planet is expected to absorb about the same amount of energy from its star that the Earth absorbs from the Sun.
g D: NA

Habitable zone
g A: To be warmed sufficiently have liquid water at the surface, an Earth-type rocky planet around Star A would have to have an orbital distance around 0.35 AU, with a year lasting less than 88 days. Star probably is not luminous enough to support an Earth-like world in an orbit similar to that of Earth around Sol.
g B: To be warmed sufficiently have liquid water at the surface, an Earth-type rocky planet around Star B would be located with 0.23 AU and a period of less than 49 days. Star probably is not luminous enough to support an Earth-like world in an orbit similar to that of Earth around Sol.
g C: Water zone would be located at around 0.02 AU with a period of only days; at such a close distance, a planet would probably be tidally locked.
g D: NA

Orbital map
g See map
g Stars A and B have an average separation of 12.6 AUs (a semi-major axis of 1.81") in a highly eccentric orbit (e= 0.58). The orbital period takes 42.15 years to complete
g Stars A and B have been separated from Star C by 56 to 213 AUs (8 to 30.5") at an orbital inclination of 139° to 215 AUs (30.8") at an inclination of 136°
g Star D apparently is not gravitationally bound to Stars A-B-C

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g CD-32 13297: 3.5 ly
g 36 Ophiuchi 3? (K0-1 Ve K1-5 Ve K5-6 Ve): 4.5 ly
g CD-44 11909: 7.1 ly
g CD-37 10765 AB: 7.2 ly
g HR 6416 AB (G8-K0 V; M0 V): 7.9 ly
g CD-40 9712: 8.6 ly
g CD-46 11540: 8.8 ly
g L 205-128: 9.0 ly
g G 154-44: 9.7 ly
g L 347-14: 9.7 ly

Map locating star system
g NA

Location in Earth sky
g In Constellation Scorpius, west of the Butterfly Cluster and northwest of Lesath (Upsilon Scorpii) and Shaula (Lamda Scorpii); Star A is a relatively bright star in Earth's night sky

Other names
g A-C: HR 6426 ABC
g A-C: MLO 4 ABC
g A: Hip 84709; HD 156384; CD-34 11626 A; CP-34 6803; SAO 208670; LHS 442; LTT 6888; LFT 1336; LPM 638; UGPMF 433
g B: LHS 442
g C: LHS 443; CD-34 11626 C, MLO 4 C
g D: CCDM J17190-3459D

Sci-fi mentions
g NA

Thursday, October 25, 2007

LHS 22

Star type
g M4.5 Vp

Distance from Earth
g 22.7 ly

Star Service No.
g NA

Age
g NA

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

Brightness (xSol)
g NA

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 Perseus

Other names
g GJ 1068; LHS 22; L 230-188; GJ 1068

Sci-fi mentions
g NA


Luyten 97-12

Star type
g DQ9 (white dwarf)

Distance from Earth
g 22.54 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 7.2%; NA

Brightness (xSol)
g 0. 03%

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 See map

Location in Earth sky
g NA

Other names
g Gliese 293
g LHS 34
g WD 752-676

Sci-fi mentions
g In Frontier Elite II game, home of a planetoid and of a temporal singularity gateway located near “Planet 8”; wormholes connect the star system to five different stars, including Sol
g In “The Pyramids of Luyten,” a “SpaceMaster” scenario, is home to four planets (though game incorrectly lists star as being in the F spectral class)
g In German novel “Among the Elites”, home to an asteroid belt
g In computer game Gateway, is home to Fort Schmidt

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Wednesday, October 24, 2007

SCR 0630-7643 AB

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

Distance from Earth
g 22.5 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA
g B: NA

Brightness (xSol)
g A: NA
g B: NA

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: NA
g B: NA

Orbital map
g Sep(AB)=1.0"

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 Camelopardalis

Other names
g NA

Sci-fi mentions
g NA


Tuesday, October 23, 2007

EE Leonis

Star type
g M4 Ve

Distance from Earth
g 22.5 ly

Star Service No.
g NA

Age
g NA

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

Brightness (xSol)
g 0.0937%

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 See research paper "The orbit of Wolf 358"

View from star
g See sky map

Nearby stars
(Star systems with 10 light years)
g Ross 128: 8.4 ly
g Wolf 424 AB: 7.2 ly

Map locating star system
g See stellar map

Location in Earth sky
g In constellation Leo

Other names
g Wolf 358
g Gl 402
g Hip 53020
g LHS 294

Sci-fi mentions
g NA

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Monday, October 22, 2007

Ross 671 AB

Star type
g A: M1.5 Ve
g B: M V

Distance from Earth
g 22.45 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; 55%; NA
g B: NA

Brightness (xSol)
g A: 7.11%
g B: NA

Metallicity
g A: NA
g B: NA

Comparison to Sol
g See chart

Picture of star
g A: NA
g B: NA

Star system features
g Research paper: “Parallaxes and proper motions of Ross 671, Ross 775 and del Tri”

Known planets
g A: None
g B: NA

Habitable zone
g Speculation of what life on a planet orbiting Ross 671 might be like

Orbital map
g NA

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 Pegasus

Other names
g Gliese 880 AB
g LHS 533AB
g BD+15 4733 AB
g HD 216899
g HIP 113296
g TW Psa
g YPC 5563.00

Sci-fi mentions
g NA

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Sunday, October 21, 2007

LP 771-095 ABC

Star type
g A: M3 V
g B: M3.5 V
g C: M V

Distance from Earth
g 22.4 ly

Star Service No.
g NA

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

Diameter/Mass/Temp (xSol)
g A: NA; 13.9%; NA
g B: NA; 17.3%; NA
g C: NA; NA; NA

Brightness (xSol)
g A: 0.099%
g B: 0.2157%
g C: NA

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

Comparison to Sol
g See illustration (each star similar to Proxima)

Picture of star
g NA

Star system features
g NA

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

Habitable zone
g A: NA
g B: NA
g C: 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 Cetus/Eridanus

Other names
g GJ 3192 ABC
g B: LTT 1445
g B: L 730-18
g B: LP 771-95


Sci-fi mentions
g NA

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Saturday, October 20, 2007

L 119-44

Star type
g M3.5V

Distance from Earth
g 22.19 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 27%; NA

Brightness (xSol)
g 1.99%

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 stars
g NA

Nearby stars
(Star systems with 10 light years)
g Delta Pavonis: 5.8 ly
g Beta Hydri: 6.1 ly
g Zeta Tucanae AB: 7.5 ly
g Gamma Pavonis: 8.5 ly

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g GJ 4285
g LTT 91087

Sci-fi mentions
g Probably is Ishkur in “Solomani Rim” (Version 6.21)

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Friday, October 19, 2007

FK 2978

Star type
g A2m

Distance from Earth
g 22.17 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 61.6%; NA

Brightness (xSol)
g 18.36%

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 NA

Sci-fi mentions
g NA

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Thursday, October 18, 2007

LHS 6158 ABC

Star type
g A: M4.5V
g B: M4.5V
g C: M4.5V

Distance from Earth
g 22.1 ly

Star Service No.
g NA

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

Diameter/Mass/Temp (xSol)
g A: NA; 19%; NA
g B: NA; 17%; NA
g C: NA; 17%; NA

Brightness (xSol)
g A: 0.06%
g B: NA
g C: NA

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

Comparison to Sol
g See chart (star similar to Proxima)

Picture of star
g NA

Star system features
g Stars A and B separated by 0.05 AU; Star C orbits stars A and B at 4.5 AUs

Known planets
g None

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 Hydra

Other names
g CNS4 749 AB
g LTT 12352
g GJ 3522
g G041-014 ABC (alt. G 41-14 ABC)

Sci-fi mentions
g NA

Wednesday, October 17, 2007

Ross 775 AB

Star type
g A: M3.5 Ve
g B: M3.5 V

Distance from Earth
g 21.99 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; NA; NA
g B: NA; 19.2%; NA

Brightness (xSol)
g A: 0.29%
g B: 0.3112%

Metallicity
g A: NA
g B: NA

Comparison to Sol
g See chart (both stars 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 Pegasus

Other names
g A: AC+17 534-105 A
g A: G-126-4
g A: LHS 508
g A: Gl 829 A
g B: AC+17 534-105 B
g B: G-126-4 B
g B: Gl 829 B

Sci-fi mentions
g NA

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Monday, October 15, 2007

ksi Bootis AB

Star type
g A: G8
g B: K4

Distance from Earth
g 21.85 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; 82.8%; 5500 K
g B: NA; 67%; NA

Brightness (xSol)
g A: 51.7%; a variable star, it brightens and dims by amout 50% over a period of 10 days due to large star spots; in addition, it is a UV Ceti type flare star, shooting irrregular flares larger than our sun's
g B: 64.6%

Metallicity
g A: NA
g B: NA

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

Picture of star
g NA

Star system features
g NA

Known planets
g A: NA
g B: NA

Habitable zone
g A: NA
g B: NA

Orbital map
g Stars on average are about 30 AU apart

View from star
g NA

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

Map locating star system
g See animation

Location in Earth sky
g In constellation Bootes

Other names
g A: GJ 566 A, Xi Bootes A, XI Boo, HD 131156, HIP 72659, BD +19° 2870, YPC 3360.00
g B: GJ 566 B, Xi Bootes B

Sci-fi mentions
g NA

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Sunday, October 14, 2007

Ross 104

Star type
g M2.5V

Distance from Earth
g 21.61 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 38.9%; NA

Brightness (xSol)
g 0.4210%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g See picture

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g See map

View from star
g See sky map

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

Map locating star system
g See stellar map

Location in Earth sky
g In constellation Leo

Other names
g AC+23 468-46; G 58-32; LHS 6193; Gl 408; LTT 12942

Sci-fi mentions
g NA

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Saturday, October 13, 2007

GJ 625

Star type
g M1.5V

Distance from Earth
g 21.47 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 0.012%; NA

Brightness (xSol)
g 0.335%

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g See picture

Star system features
g NA

Known planets
g NA

Habitable zone
g 0.0579 A.U.s

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 AC+55 41703
g G 202-48
g HIC 80459
g McC 767
g AC +54°1646-56

Sci-fi mentions
g NA

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Friday, October 12, 2007

GL Virginis

Star type
g M5 Ve

Distance from Earth
g 21.33 ly

Star Service No.
g NA

Age
g NA

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

Brightness (xSol)
g 0.0117%

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 See stellar map

Location in Earth sky
g In constellation Virgo

Other names
g G 12-30
g LHS 324
g L 1190-34
g GJ 1156
g LP 320-359

Sci-fi mentions
g NA

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Thursday, October 11, 2007

HR 8832

Star type
g K3V

Distance from Earth
g 21.28 ly

Star Service No.
g NA

Age
g 1.189 billion years (27.027 billion left on main sequence)

Diameter/Mass/Temp (xSol)
g 80%-81%; 81%; 5100 K
Brightness (xSol)
g 21%

Metallicity
g May be as enriched as Sol with elements heavier than hydrogen

Comparison to Sol
g See chart

Picture of star
g NA

Star system features
g Flare star; inactive chromospheres

Known planets
g No evidence for Jupiter-sized sized object within three AUs and objects larger than three Jupiter-masses within six AUs

Habitable zone
g About 0.46 AU (just beyond Mercury's orbital distance); such a planet would have an orbital period of about 125 days (just over a third of an Earth year). Porto de Mello lists it as one of 13 nearby astrobiologically interesting stars. Probability of a habitable planet rated as 1.1%.

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Eta Cassiopeiae AB: 4.9 ly
g EV Lacertae AB: 6.3 ly
g BD+61 2068 AB: 7.2 ly
g Mu Cassiopeiae AB: 7.3 ly
g Kruger 60 AB: 8.4 ly
g AC+71 532: 9.3 ly
g Sigma Draconis: 9.5 ly
g AC+65 6955: 9.7 ly

Map locating star system
g NA

Location in Earth sky
g Northwestern part of Constellation Cassiopeia, the Lady of the Chair - west of Schedar (Alpha Cassiopeiae) and Caph (Beta Cassiopeiae) and south of the Bubble Nebula

Other names
g NSV 14458
g CSV 8833
g BD+56 2966
g Gl 892
g Hip 114622
g HD 219134
g SAO 35236
g FK5 875
g LHS 71
g LTT 16826
g LFT 1767

Sci-fi mentions
g NA

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Wednesday, October 10, 2007

GJ 643

Star type
g M3.5

Distance from Earth
g 21.18 ly

Star Service No.
g NA

Age
g 5 by

Diameter/Mass/Temp (xSol)
g NA; 30%; 3200 K

Brightness (xSol)
g 0.074%

Metallicity
g 45%

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g See picture

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
gNS 1655-0820 D
g LHS 427
g HIP 82809
g LTT 6750
g Gl 643
g Wolf 629

Sci-fi mentions
g NA

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Tuesday, October 9, 2007

GJ 9193

Star type
g NA

Distance from Earth
g 21.07 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA

Brightness (xSol)
g NA

Metallicity
g NA

Comparison to Sol
g See chart

Picture of star
g NA

Star system features
g NA

Known planets
g NA

Habitable zone
g NA

Orbital map
g See map

View from star
g See sky map

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

Map locating star system
g See stellar map

Location in Earth sky
g NA

Other names
g EGGR 45

Sci-fi mentions
g NA

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Monday, October 8, 2007

GJ 644 ABCD

Star type
g GJ 644 A: M3 Ve
g GJ 644 B: M4
g GJ 644 C: M7
g GJ 644 D: M3.5V

Distance from Earth
g 21.05 ly

Star Service No.
g NA

Age
g GJ 644 A: NA
g GJ 644 B: NA
g GJ 644 C: NA
g GJ 644 D: NA

Diameter/Mass/Temp (xSol)
g GJ 644 A: NA; 42%; NA
g GJ 644 B: NA; 31%; NA
g GJ 644 C: NA; 9%; NA
g GJ 644 D: NA; 30%; NA

Brightness (xSol)
g GJ 644 A: 0.05011% (flare star)
g GJ 644 B: Underluminous for its mass by two or three magnitudes
g GJ 644 C: 0.0008% (?)
g GJ 644 D: NA

Metallicity
g GJ 644 A: NA
g GJ 644 B: NA
g GJ 644 C: NA
g GJ 644 D: NA

Comparison to Sol
g See chart (stars similar to (Proxima)

Picture of star
g NA

Star system features
g A brown dwarf once was thought to be part of this star system, but detection later proved false

Known planets
g GJ 644 A: NA
g GJ 644 B: NA
g GJ 644 C: NA
g GJ 644 D: NA

Habitable zone
g GJ 644 A: NA
g GJ 644 B: NA
g GJ 644 C: NA
g GJ 644 D: NA

Orbital map
g Stars A and B separated by 1.3 AU, orbiting one another every 1.7 years

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 A: Wolf 630A; V1054 Ophiuchi
g B: Wolf 630B
g C: VB 8; LHS 429; Wolf 630 C; Van Viesbroeck 8
g D: Wolf 629; Wolf 630 Da; Gliese 643; LHS 427; BD-08 4352 C; Gl 644 D; BD-08 4352 C

Sci-fi mentions
g NA

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Sunday, October 7, 2007

WD 0552-041

Star type
g DZ9 (white dwarf)

Distance from Earth
g 21.03 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 6.3%; NA (mimics a hot white dwarf with effective temperature well in excess of 105 K)

Brightness (xSol)
g 0.0063%

Metallicity
g No metal lines in its red optical spectrum, consistent with a pure He atmosphere

Comparison to Sol/Earth
g See illustration

Picture of star
g See picture

Star system features
g NA

Known planets
g NA

Habitable zone
g 0.0078 A.U.s, though white dwarfs almost certainly do not boast habitable planets (though they may sport remnants of previous life before the star became a white dwarf)

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Bonner Durchmusterung -3°1123: 3.10542 ly
g Giclas 99-49: 4.25694 ly
g Luyten Half-Second 1723: 5.42294 ly
g Ross 47: 6.27906 ly
g Eggen/Greenstein white dwarf 290: 6.33627 ly
g Gliese 229: 6.70007 ly
g Steph 538: 7.63641 ly
g V577 Monoceri: 8.07072 ly
g Omicron(2) Eridani: 9.1398 ly (class K1e V)
g Pi(3) Orionis: 9.35453 ly (class F6 V)
g Bonner Durchmusterung -5°1123: 9.489 ly (class K3 V)
g Bonner Durchmusterung -5°1844: 9.67321 ly (class K3 V)

Map locating star system
g NA

Location in Earth sky
g NA

Other names
g GJ 223.2
g HL 4
g LHS 32
g EG 45
g LP 658-002

Sci-fi mentions
g NA


The Meaning of Star Trek: An Excursion Into the Myth and Marvel of the Star Trek Universe

Saturday, October 6, 2007

Sand 215

Star type
g M4.5V

Distance from Earth
g 20.91 ly

Star Service No.
g NA

Age
g NA

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

Brightness (xSol)
g 0.0489%

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 2097
g LP 378-541

Sci-fi mentions
g NA

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Friday, October 5, 2007

G 180-060

Star type
g M5V

Distance from Earth
g 20.91 ly (alt. source says 32.4 ly)

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 10%; NA

Brightness (xSol)
g NA (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 Hercules

Other names
g GJ 3959

Sci-fi mentions
g NA

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Thursday, October 4, 2007

LHS 337

Star type
g M4.0V

Distance from Earth
g 20.83 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g NA; 6.3%; NA

Brightness (xSol)
g 0.0196%

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 3737; LP 71-165; N1 1074; LTT 4818; L 471-42

Sci-fi mentions
g NA


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Wednesday, October 3, 2007

QY Aurigae AB

Star type
g A: M4.5Ve
g B: M6V

Distance from Earth
g 20.62-20.74 ly

Star Service No.
g NA

Age
g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: NA; 17%; NA
g B: NA; 16%; NA

Brightness (xSol)
g A: 0.0847%
g B: NA

Metallicity
g A: NA
g B: 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 0.030 A.U.s; It would orbit the binary every 5.2319 days

Orbital map
g NA

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g Wolf 294: 3.49672 ly
g Giclas 111-47: 7.07792 ly
g Gliese & Jahreiss 1093: 8.94071 ly
g SFT 1321: 9.08077 ly

Map locating star system
g NA

Location in Earth sky
g In constellation Auriga

Other names
g Ross 986 AB
g GJ 268 AB
g LHS 226
g G 87-26
g HIP 34603
g AC +38°23616

Sci-fi mentions
g NA

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Tuesday, October 2, 2007

GJ 661 AB

Star type
g A: M3.0 V
g B: M3.5

Distance from Earth
g 20.62 ly

Star Service No.
g NA

Age
g NA

Diameter/Mass/Temp (xSol)
g A: NA; 38.9%; NA
g B: NA; 33%; NA

Brightness (xSol)
g A: 0.3670%
g B: 0.2475%

Metallicity
g A: NA
g B: NA

Comparison to Sol
g A: 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 Hercules

Other names
g A: Proxima Herculis; HD 155876; HIP 84140; BD+45° 2505 A; YPC 3907.00; Vys 165A; LHS 433; Kui 79 A; Fur46A
g B: BD+45° 2505 B; Kui 79 B; LHS 434

Sci-fi mentions
g NA

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Monday, October 1, 2007

LHS 2090

Star type
g M6.0

Distance from Earth
g 20.5 ly

Star Service No.
g NA

Age
g NA

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

Brightness (xSol)
g NA

Metallicity
g NA

Comparison to Sol
g See chart (similar to Proxima)

Picture of star
g See picture

Star system features
g Research paper” “Search For Nearby Stars Among Proper Motion Stars Selected By Optical-To-Infrared Photometry. I. Discovery of LHS 2090 at Spectroscopic Distance of d=6pc

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 Cancer

Other names
g LP 368-128

Sci-fi mentions
g NA

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