FK Comae Berenices
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 13h 30m 46.804s[1] |
| Declination | +24° 13′ 57.75″[1] |
| Apparent magnitude (V) | 8.17 |
| Characteristics | |
| Spectral type | G5II |
| Variable type | FK Com |
| Astrometry | |
| Radial velocity (Rv) | –16.6 km/s |
| Proper motion (μ) | RA: –53.11 ± 0.74[1] mas/yr Dec.: –19.71 ± 0.40[1] mas/yr |
| Parallax (π) | 5.96 ± 0.68 mas[1] |
| Distance | approx. 550 ly (approx. 170 pc) |
| Absolute magnitude (MV) | 1.2[2] |
| Details | |
| Radius | 4 R☉ |
| Luminosity | 30 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
FK Comae Berenices is a variable star that varies in apparent magnitude between 8.14m and 8.33m over a period of 2.4 days. It is the prototype for the FK Com class of variable stars. The variability of FK Com stars may be caused by large, cool spots on the rotating surfaces of the stars.
References
- ^ 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
- ^ "Study of FK Comae Berenices. I. Surface images for 1994 and 1995". Astronomy and Astrophysics. 1999. p. 103. Retrieved June 18, 2014.
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