28 Andromedae

**28 Andromedae**
Observation data Epoch J2000 Equinox J2000
Andromeda Constellation 28 Andromedae
Constellation	Andromeda
Right ascension	00^h 30^m 07.365^s
Declination	+29° 45′ 05.604″
Apparent magnitude (V)	5.2
Characteristics
Spectral type	A7III
U-B color index	0.09
B-V color index	0.24
Variable type	Delta Scuti variable
Astrometry

Radial velocity (R_v)	-10.2 km/s
Proper motion (μ)	RA: 43.56 mas/yr Dec.: -57.18 mas/yr
Parallax (π)	17.62 ± 0.86 mas
Distance	185 ± 9 ly (57 ± 3 pc)
Absolute magnitude (M_V)	5.463

Details

Mass	? M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	0.000188856 Year
Age	? years

Orbit
Companion	28 Andromedae B
Semimajor axis (a)	2.4"
Inclination (i)	6°
Orbit
Companion	28 Andromedae C
Semimajor axis (a)	139.3"
Inclination (i)	130°
Other designations
V* GN Andromedae, GC 583, IRAS 00274+2928, TD1 251, GCRV 264, 2MASS J00300734+2945058, TYC 1737-2790-1, BU 1095AB, N30 90, UBV M 7417, ADS 409 AB, GSC 01737-02790, PLX 81, UBV 363, AG+29° 71, HD 2628, PPM 89834, uvby98 100002628 ABV, BD+28° 75, HIC 2355, ROT 96, YZ 29 267, CCDM J00302+2945AB, HIP 2355, SAO 74041, AAVSO 0024+29, CSI+28° 75 1, HR 114, CSV 100032, IDS 00248+2912 AB.
Database references
SIMBAD	data
Database references
SIMBAD	data

28 Andromedae or (GN Andromedae) is a star in the constellation Andromeda. Its apparent magnitude is 5.20.

[edit] Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Spectral type	Database references
28 Andromedae B	00^h 30^m 07.365^s	+29° 45' 05.604	5.219	A7III	Simbad
28 Andromedae C (BD+28 75C)	00^h 30^m 09.5^s	+29° 44' 41	11.4		Simbad

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