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Chi Andromedae

Chi Andromedae
Diagram showing star positions and boundaries of the Andromeda constellation and its surroundings
Cercle rouge 100%.svg

Location of χ Andromedae (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 01h 39m 21.0s
Declination +44° 23′ 10″
Apparent magnitude (V) +5.1627
Characteristics
Spectral type G8 III
U−B color index +0.55
B−V color index +0.883
Astrometry
Radial velocity (Rv) +6.54 km/s
Proper motion (μ) RA: –19.78 mas/yr
Dec.: +15.40 mas/yr
Parallax (π) 13.03 ± 0.55mas
Distance 250 ± 10 ly
(77 ± 3 pc)
Orbit
Period (P) 21.5 ± 0.1 yr
Eccentricity (e) 0.368 ± 0.020
Periastron epoch (T) 43,216 ± 60 MJD
Argument of periastron (ω)
(secondary)
144 ± 3°
Semi-amplitude (K1)
(primary)
3.01 ± 0.09 km/s
Details
Radius R
Luminosity 47 L
Surface gravity (log g) 2.9 cgs
Temperature 5,070 K
Metallicity [Fe/H] –0.21 dex
Rotational velocity (v sin i) 0.0 km/s
Other designations
52 Andromedae, BD+43°343, FK5 2112, HD 10072, HIP 7719, HR 469,SAO 37406
Database references
SIMBAD data

Chi Andromedae (χ Andromedae, χ And) is the Bayer designation for a star in the northern constellation of Andromeda. It has an apparent visual magnitude of +5.2, which is relatively faint for a naked-eye star. Based upon parallax measurements made during the Hipparcos mission, Chi Andromedae is located around 250 light-years (77 parsecs) from Earth.

It with φ And composed the Chinese asterism 軍南門 (Keun Nan Mun, Mandarin jūnnánmén), "the South Gate of the Camp". χ Andromedae is a member of 天大將軍 (Tiān Dà Jiāng Jūn), meaning Heaven's Great General, together with γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, θ Andromedae, τ Andromedae, 56 Andromedae, β Trianguli, γ Trianguli and δ Trianguli. Consequently, χ Andromedae itself is known as 天大將軍五 (Tiān Dà Jiāng Jūn wǔ, English: the Fifth Star of Heaven's Great General.)


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