HD 23089

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HD 23089
Observation data
Epoch J2000       Equinox J2000
Constellation Camelopardalis [1]
Right ascension 03h 46m 02.33087s [2]
Declination +63° 20′ 42.1639″ [2]
Apparent magnitude  (V)4.79 [3]
Characteristics
Spectral type G2II-III + B9V [4]
U−B color index +0.24 [3]
B−V color index +0.79 [3]
R−I color index 0.53
Astrometry
Radial velocity (Rv)-2.4 [5] km/s
Proper motion (μ)RA: -0.94 [2] mas/yr
Dec.: -8.41 [2] mas/yr
Parallax (π)4.08±0.66  mas [2]
Distance approx. 800  ly
(approx. 250  pc)
Absolute magnitude  (MV)−2.70 –−1.50 [6]
Orbit [6]
Period (P)6,124±3 d
Eccentricity (e)0.678±0.003
Inclination (i)87±4°
Periastron epoch (T)MJD45850±3
Argument of periastron (ω)
(secondary)		136.5±0.6°
Semi-amplitude (K1)
(primary)		15.87±0.08 km/s
Semi-amplitude (K2)
(secondary)		17.6±0.34 km/s
Details
HD 23089 A
Mass 5.0±0.24 [6]   M☉
Radius 41±7.3 [6]   R☉
Luminosity 1,150 [6]   L☉
Surface gravity (log g)2.88 [7]   cgs
Temperature 5,250 [6]   K
Metallicity [Fe/H]−0.28 [7]   dex
HD 23089 B
Mass 4.5±0.21 [6]   M☉
Radius 5.3±0.9 [6]   R☉
Luminosity708 [6]   L☉
Temperature 13,000±300 [6]   K
Rotational velocity (v sin i)18 [8]  km/s
Other designations
BD+62°604, HD 23089, HIP 17587, HR 1129, SAO 12891
Database references
SIMBAD data

HD 23089 is a spectroscopic binary [6] star in the northern constellation of Camelopardalis. Based on stellar parallax measurements made by Hipparcos, the system is about 800 ly (250 pc) away from the Sun. [2]

The system consists of a cooler giant star and hotter main sequence companion. [4] The pair orbit each other every 6,124 days, on an orbit that is relatively eccentric, at 0.678. Unpublished speckle observations suggest that the orbit is tilted towards the Earth's line of sight, and it has a relatively high inclination of about 87 degrees. [6]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 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, S2CID   18759600
  3. 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  4. 1 2 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
  5. ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W
  6. 1 2 3 4 5 6 7 8 9 10 11 12 Griffin, R. E. M.; Griffin, R. F.; Stickland, D. J. (2006), "Composite spectra Paper 14: HR 1129, a long-period binary showing evidence of circumbinary material", Monthly Notices of the Royal Astronomical Society, 373 (4): 1351–1368, Bibcode:2006MNRAS.373.1351G, doi: 10.1111/j.1365-2966.2006.11110.x
  7. 1 2 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
  8. ↑ 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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