2 Andromedae

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Not to be confused with Andromeda II.
2 Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 23h 02m 36.38s[1]
Declination +42° 45′ 28.1″[1]
Apparent magnitude (V) 5.093
Characteristics
Spectral type A3Vn
U−B color index 0.11
B−V color index 0.09
Astrometry
Radial velocity (Rv) 2 km/s
Proper motion (μ) RA: 56.38 ± 0.30[1] mas/yr
Dec.: −4.47 ± 0.38[1] mas/yr
Parallax (π) 7.74 ± 0.51[1] mas
Distance 420 ± 30 ly
(129 ± 9 pc)
Absolute magnitude (MV) 5.18
Orbit[2]
Companion 2 Andromedae B
Period (P) 73.997 ± 0.509 yr
Semi-major axis (a) 0.225 ± 0.011"
Eccentricity (e) 0.800 ± 0.056
Inclination (i) 21.7 ± 46.0°
Longitude of the node (Ω) 159.5 ± 2.0°
Periastron epoch (T) 1870.280 ± 0.595
Other designations
2 And, BD+41° 4665, GJ 886.1 A, HD 217782, HIP 113788, HR 8766, SAO 52623
Database references
SIMBAD data
Database references
SIMBAD data

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

The binary nature of the star was discovered by Sherburne Wesley Burnham at Lick Observatory in 1889.[3]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Rica Romero, F. M. (2010). "Orbital elements for eight binaries. Study of the nature of wide components. I". Revista Mexicana de Astronomía y Astrofísica 46: 263–277. Bibcode:2010RMxAA..46..263R. 
  3. ^ Burnham, S. W. (1894). "Sixteenth Catalogue of New Double Stars Discovered at the Lick Observatory". Publications of Lick Observatory 2: 197–205. Bibcode:1894PLicO...2..197B. 

External links[edit]