Deneb Algedi ABCD

Star type
g A (aka Aa): A3-F2 IV-IIIm
g B: M?
g C: M?
g D (aka Ab): K-G

Distance from Earth
g 51 ly (alt. source says 38.6 ly)

Star Service No.
g NA

Age
g A: 600 million years old
g B: NA
g C: NA
g D: On the main sequence or still contracting towards it

Diameter/Mass/Temp (xSol)
g A: 190%; 200%; 7700 K
g B: NA; NA; NA
g C: NA; NA; NA
g D: 100%; 73%; NA

Brightness (xSol)
g A: 850% to 970%
g B: Less than 6/100,000 of Sol
g C: less than 1/1000 of Sol
g D: NA

Metallicity
g A: NA
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: NA
g D: NA

Habitable zones
g A: An Earth-type planet could have liquid water in a stable orbit centered around 3 AU from Star A, or between the orbital distances of the Main Asteroid Belt and Jupiter in the Solar System. Such a planet would have an orbital period around 3.7 years (1,351 days). If there is life on any Earth-type planet orbiting youthful Stars A and D, it is likely to be primitive single-cell, anaerobic (non-oxygen producing) bacteria under constant bombardment by meteorites and comets as Earth was for the first billion years. Since there is unlikely to be free oxygen in the atmosphere of such a planet, it probably would not have an ozone layer (O3) as Star A puts out a lot more hard radiation in ultraviolet wavelengths than Sol.
g B: NA
g C: NA
g D: NA

Orbital map
g A: In synchronous orbit, Stars A and D are separated by a distance of 0.025 AUs and orbital period of slightly over 1.02 days; see map
g B: In 1901, it was separated from the primary (Star A) by around 820 AUs at a position angle of 94 degrees
g C: Separated from Star A by around 1,400 AUs (at a position angle of 302 degrees) in 1901 and 118.9 AUs in 1910
g D: See Star A above; see map

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g L 715-89: 3.3 ly
g GJ 1265: 5.8 ly
g Wolf 918: 6.6 ly
g LP 760-3: 7.3 ly
g Wolf 1561 AB: 8.1 ly
g L 714-88: 9 ly
g L 856-54 AB: 9.7 ly
g Psi Capricorni: 16 ly
g HR 7898 (G8-K0 V): 16 ly
g Fomalhaut: 18 ly

Map locating star system
g NA

Location in Earth sky
g In northeastern part of of Constellation Capricornus, the Water or Sea Goat - southwest of Sadalmelik (Alpha Aquarii) and southeast of Sadalsuud (Beta Aquarii) and the Saturn Nebula (NGC 7009), slightly northeast of Theta Capricorni and M30; slightly southeast of Algedi (Alpha1,2 Capricorni) Dabih (Beta1 Capricorni), northwest of Fomalhaut (Alpha Piscis Australis), and west of Skat (Delta Aquarii)

Other names
g A: Delta Capricorni, Deneb Algiedi, Scheddi or Sheddi (which also used for Gamma Capricorni), Del Cap A, 49 Del Cap, HR 8322, Gl 837, HD 207098, HIP 107556, BD-16 5943, SAO 164644, FK5 819, LTT 8693, ADS 15314 A, WDS 21470-1608 A, HJ 3056 A
g B: BD-16 5943 B, ADS 15314 B, WDS 21470-1608 B, HJ 3056 B
g C: BD-16 5943 C, ADS 15314 C, WDS 21470-1608 C, HJ 3056 C
g D: NA

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

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