Zeta Andromedae

ζ Andromedae
	Location of ζ Andromedae
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Andromeda
Right ascension	00h 47m 20.32547s
Declination	+24° 16′ 01.8408″
Apparent magnitude (V)	3.92 to 4.14
Characteristics
Spectral type	K1III + KV
U−B color index	+0.90
B−V color index	+1.12
R−I color index	+0.59
Variable type	ELL/RS
Astrometry
Radial velocity (Rv)	−24.43 ± 0.1 km/s
Proper motion (μ)	RA: −101.17 mas/yr ; Dec.: −81.77 mas/yr
Parallax (π)	17.24 ± 0.26 mas
Distance	189 ± 3 ly ; (58.0 ± 0.9 pc)
Absolute magnitude (MV)	+0.14
Orbit
Period (P)	17.769426
Semi-major axis (a)	2.7 R*
Eccentricity (e)	0.0
Inclination (i)	65 ± 5°
Details
Aa
Mass	2.6 ± 0.4 M☉
Radius	15.9 ± 0.8 R☉
Luminosity	95.5 L☉
Surface gravity (log g)	2.8 cgs
Temperature	4,665 ± 140 K
Metallicity [Fe/H]	−0.30 dex
Rotation	17.77 days
Rotational velocity (v sin i)	41.4 ± 0.2 km/s
Ab
Mass	0.75 M☉
Other designations
	ζ And, Zeta Andromedae, Zeta And, 34 Andromedae, 34 And, BD+23 106, CCDM J00473+2416A, FK5 27, GC 940, HD 4502, HIP 3693, HR 215, IDS 00421+2344 A, PPM 90149, SAO 74267, WDS 00473+2416A.
Database references
SIMBAD	data

Zeta Andromedae (Zeta And, ζ Andromedae, ζ And) is a star system in the constellation Andromeda. It is approximately 189 light-years from Earth.

Zeta Andromedae is the star's Bayer designation. It also has the Flamsteed designation 34 Andromedae and multiple other designations in stellar catalogues.

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[korhonen-6] Cite error: The named reference korhonen was invoked but never defined (see the help page).

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of ζ Andromedae
Constellation	Andromeda
Right ascension	00^h 47^m 20.32547^s^[1]
Declination	+24° 16′ 01.8408″^[1]
Apparent magnitude (V)	3.92 to 4.14^[2]
Characteristics
Spectral type	K1III + KV^[3]
U−B color index	+0.90^[4]
B−V color index	+1.12^[4]
R−I color index	+0.59^[4]
Variable type	ELL/RS^[2]
Astrometry

Radial velocity (R_v)	−24.43 ± 0.1^[5] km/s
Proper motion (μ)	RA: −101.17^[1] mas/yr Dec.: −81.77^[1] mas/yr
Parallax (π)	17.24 ± 0.26 mas^[1]
Distance	189 ± 3 ly (58.0 ± 0.9 pc)
Absolute magnitude (M_V)	+0.14^[3]

Orbit^[3]
Period (P)	17.769426
Semi-major axis (a)	2.7 R_*
Eccentricity (e)	0.0
Inclination (i)	65 ± 5°
Details
Aa
Mass	2.6 ± 0.4^[3] `M`_☉
Radius	15.9 ± 0.8^[6] `R`_☉
Luminosity	95.5^[3] `L`_☉
Surface gravity (log g)	2.8^[3] cgs
Temperature	4,665 ± 140^[6] K
Metallicity [Fe/H]	−0.30^[3] dex
Rotation	17.77 days^[7]
Rotational velocity (v sin i)	41.4 ± 0.2^[3] km/s
Ab
Mass	0.75^[3] `M`_☉
Other designations
ζ And, Zeta Andromedae, Zeta And, 34 Andromedae, 34 And, BD+23 106, CCDM J00473+2416A, FK5 27, GC 940, HD 4502, HIP 3693, HR 215, IDS 00421+2344 A, PPM 90149, SAO 74267, WDS 00473+2416A.
Database references
SIMBAD	data