4 Camelopardalis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 04h 48m 00.27274s[1] |
| Declination | +56° 45′ 25.8645″[1] |
| Apparent magnitude (V) | 5.26[2] |
| Characteristics | |
| Spectral type | A3m[3] |
| U−B color index | 0.12[2] |
| B−V color index | 0.25[2] |
| Astrometry | |
| Radial velocity (Rv) | 22.50±0.9[4] km/s |
| Proper motion (μ) | RA: +52.74[1] mas/yr Dec.: -145.87[1] mas/yr |
| Parallax (π) | 18.95 ± 0.52[1] mas |
| Distance | 172 ± 5 ly (53 ± 1 pc) |
| Details | |
| Rotational velocity (v sin i) | 75[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
4 Camelopardalis is a star in the northern constellation of Camelopardalis. With an apparent visual magnitude of 5.26, it is faintly visible to the naked eye. This is classified as an Am star, which indicates that the spectrum shows abnormalities of certain elements.[6] There is a faint, magnitude 9.49 companion at an angular separation of 0.610″; most likely the pair form a binary star system.[7]
References
- 1 2 3 4 5 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:10.1051/0004-6361:20078357Vizier catalog entry
- 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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
- ↑ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- ↑ Royer, F.; et al. (2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i in the northern hemisphere", Astronomy and Astrophysics 393 (3): 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943
- ↑ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x
External links
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