2 Andromedae

**2 Andromedae**
Observation data Epoch J2000
Image:2 Andromedae.jpg 2 Andromedae
Constellation (pronunciation)	Andromeda
Right ascension	23^h 02^m 36.3811^s
Declination	+42° 45′ 28.061″
Apparent magnitude (V)	5.093
Characteristics
Spectral type	A3Vn
U-B color index	0.11
B-V color index	0.09
Astrometry
Radial velocity (R_v)	2 km/s
Proper motion (μ)	RA: 55.67 mas/yr Dec.: -4.77 mas/yr
Parallax (π)	9.33 ± 0.7 mas
Distance	350 ± 30 ly (107 ± 8 pc)
Absolute magnitude (M_V)	5.18
Details
Mass	? M_☉
Radius	? R_☉
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	?
Age	? years
Visual binary orbit
Companion	2 Andromedae B
Period (P)	76.6 yr
Semimajor axis (a)	0.277"
Eccentricity (e)	0.62
Inclination (i)	48.9°
Longitude of the node (Ω)	159.6°
Periastron epoch (T)	1875
Visual binary orbit
Companion	2 Andromedae C
Semimajor axis (a)	90.4"
Inclination (i)	192°
Visual binary orbit
Companion	2 Andromedae D
Other designations
* 2 And, CSI+41 4665 1, HIC 113788, SAO 52623, BU 1147AB, CSI+41 4665 3, HIP 113788, ** BU 1147, [GC]] 32110, HR 8766, TD1 29557, ADS 16467 A, GCRV 14455, IDS 22580+4213 A, TYC 3224-3432-1, AG+42° 2239, GJ 886.1 A, 2MASS J23023636+4245283, UBV 19750, BD+41° 4665, GSC 03224-03432, PLX 5580, YPAC 219, CCDM J23026+4245A, HD 217782, PPM 63742, WDS J23026+4245, CEL 5558, HGAM 1109, ROT 3352.
Database references
SIMBAD	data
Database references
SIMBAD	data

2 Andromedae is a star in the constellation Andromeda. Its apparent magnitude is 5.09.

Andromeda Constellation

[edit] Components

NAME	Right ascension	Declination	Apparent magnitude (V)	Database references
2 Andromedae B (ADS 16467 AB)	23^h 02^m 36^s	+42° 45' 00	5.09	Simbad
2 Andromedae C (NSV 14396)	23^h 02^m 36^s	+42° 45' 00	8.8	Simbad
2 Andromedae D (BD+41 4665C)	23^h 02^m 34.2^s	+42° 44' 00	13.7	Simbad