HD 23089

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HD 23089
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 03h 46m 02.33087s[1]
Declination +63° 20′ 42.1639″[1]
Apparent magnitude (V) 4.79[2]
Spectral type G2II-III + B9V[3]
U−B color index +0.24[2]
B−V color index +0.79[2]
R−I color index 0.53
Radial velocity (Rv) -2.4[4] km/s
Proper motion (μ) RA: -0.94[1] mas/yr
Dec.: -8.41[1] mas/yr
Parallax (π) 4.08 ± 0.66[1] mas
Distance approx. 800 ly
(approx. 250 pc)
Period (P) 6,150 d
Eccentricity (e) 0.67
HD 23089 A
Surface gravity (log g) 2.88[6] cgs
Temperature 4,750[6] K
Metallicity [Fe/H] −0.28[6] dex
HD 23089 B
Rotational velocity (v sin i) 18[7] km/s
Other designations
BD+62° 604, HD 23089, HIP 17587, HR 1129, SAO 12891.
Database references

HD 23089 is a spectroscopic binary star in the northern constellation of Camelopardalis. The system consists of a cooler giant star and hotter main sequence companion,[3] with the pair orbiting each other every 6,150 days.[5]


  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752Freely accessible, doi:10.1051/0004-6361:20078357 
  2. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M 
  3. ^ a b Parsons, Sidney B.; Ake, Thomas B. (November 1998), "Ultraviolet and Optical Studies of Binaries with Luminous Cool Primaries and Hot Companions. V. The Entire IUE Sample", The Astrophysical Journal Supplement Series, 119 (1): 83–104, Bibcode:1998ApJS..119...83P, doi:10.1086/313152 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W 
  5. ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878Freely accessible, doi:10.1111/j.1365-2966.2008.13596.x 
  6. ^ a b c McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527 
  7. ^ Abt, Helmut A.; Morrell, Nidia I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182 

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