| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h46m 02.33087s[1] |
| Declination | +63° 20′ 42.1639″[1] |
| Apparent magnitude (V) | 4.79[2] |
| Characteristics | |
| 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 |
| Astrometry | |
| 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 mas[1] |
| Distance | approx. 800 ly (approx. 250 pc) |
| Absolute magnitude (MV) | −2.70 + −1.50[5] |
| Orbit[5] | |
| Period (P) | 6124 ± 3 d |
| Eccentricity (e) | 0.678 ± 0.003 |
| Inclination (i) | 87 ± 4° |
| Periastron epoch (T) | MJD 45850 ± 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[5] M☉ |
| Radius | 41 ± 7.3[5] R☉ |
| Luminosity | 1,150[5] L☉ |
| Surface gravity (log g) | 2.88[6] cgs |
| Temperature | 5,250[5] K |
| Metallicity [Fe/H] | −0.28[6] dex |
| HD 23089 B | |
| Mass | 4.5 ± 0.21[5] M☉ |
| Radius | 5.3 ± 0.9[5] R☉ |
| Luminosity | 708[5] L☉ |
| Temperature | 13,000 ± 300[5] K |
| Rotational velocity (v sin i) | 18[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 23089 is a spectroscopic binary[5] star in the northern constellationofCamelopardalis. Based on stellar parallax measurements made by Hipparcos, the system is about 800 ly (250 pc) away from the Sun.[1]
The system consists of a cooler giant star and hotter main sequence companion.[3] 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 Unpublished speckle observations suggest that the orbit is tilted towards the Earth's line of sight, and it has a relatively high inclination of about 87 degrees.[5]
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 | This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |
 | This giant-star-related article is a stub. You can help Wikipedia by expanding it. |
