28 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis, located around 710 light years away from the Sun.[1] It has an apparent visual magnitude of 6.79,[2] which is below the normal limit for visibility to the naked eye. This star is moving further from the Earth with a heliocentric radial velocity of 20 km/s.[5] It is a probable Ap star[3][8] with a stellar classification of A7 V[4] and an overabundance of chromium in the spectrum.[3]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 46m 54.60612s[1] |
| Declination | 56° 55′ 26.1502″[1] |
| Apparent magnitude (V) | 6.79[2] |
| Characteristics | |
| Spectral type | ApCr[3] or A7 V[4] |
| B−V color index | 0.141±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | 19.7±2[5] km/s |
| Proper motion (μ) | RA: 9.278[1] mas/yr Dec.: -25.985[1] mas/yr |
| Parallax (π) | 4.6006 ± 0.1994 mas[1] |
| Distance | 710 ± 30 ly (217 ± 9 pc) |
| Absolute magnitude (MV) | 0.13[2] |
| Details | |
| Mass | 2.0[6] M☉ |
| Radius | 4.7[6] R☉ |
| Luminosity | 74.04[2] L☉ |
| Surface gravity (log g) | 3.4[6] cgs |
| Temperature | 8,003[1] K |
| Rotational velocity (v sin i) | 32.3±3.8[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
edit- ^ a b c d e f g Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c Bidelman, William P. (1988). "Miscellaneous spectroscopic notes". Astronomical Society of the Pacific. 100: 1084. Bibcode:1988PASP..100.1084B. doi:10.1086/132274.
- ^ a b Cowley, Anne Pyne; Cowley, Charles R. (June 1965), "Slit Spectra of Some Peculiar and Metallic-Line A Stars", Publications of the Astronomical Society of the Pacific, 77 (456): 184, Bibcode:1965PASP...77..184C, doi:10.1086/128190, S2CID 34476280
- ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W.
- ^ a b c d Moiseeva, A. V.; et al. (January 2019). "Fundamental Parameters of CP Stars Observed at the 6-m Telescope. I. Observations in 2009–2011". Astrophysical Bulletin. 74 (1): 62–65. Bibcode:2019AstBu..74...62M. doi:10.1134/S1990341319010061.
- ^ "28 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-18.
- ^ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HgMn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788.
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |