HD 90089
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (September 2010) |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 10h 31m 04.6638s |
| Declination | +82° 33′ 30.915″ |
| Apparent magnitude (V) | 5.25[1] |
| Characteristics | |
| Spectral type | F2V[1] |
| U−B color index | -0.05 |
| B−V color index | 0.40[1] |
| Variable type | Variable star NSV 4864 |
| Astrometry | |
| Radial velocity (Rv) | 7 km/s |
| Proper motion (μ) | RA: -79.21 mas/yr Dec.: 20.43 mas/yr |
| Parallax (π) | 46.54 ± 0.55 mas |
| Distance | 70.1 ± 0.8 ly (21.5 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.60[2] |
| Details | |
| Luminosity (bolometric) | 2.840[1] L☉ |
| Surface gravity (log g) | 4.32[1] cgs |
| Temperature | 6,170[1] K |
| Metallicity [Fe/H] | −0.26[1] dex |
| Rotation | 56.2[1] |
| Age | 0.30[1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 90089 is a suspected variable star in the constellation Camelopardalis.
An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 145 AU. The temperature of this dust is 30 K.[1]
References
- ^ a b c d e f g h i j Eiroa, C.; et al. (July 2013). "DUst around NEarby Stars. The survey observational results". Astronomy & Astrophysics. 555: A11. arXiv:1305.0155. Bibcode:2013A&A...555A..11E. doi:10.1051/0004-6361/201321050.
- ^ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911.
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