HD 24479
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 03h 57m 25.44380s[1] |
| Declination | +63° 04′ 20.1442″[1] |
| Apparent magnitude (V) | 4.95[2] |
| Characteristics | |
| Spectral type | B9 IV[3] or B9.5 V[4] |
| B−V color index | −0.074±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | +4.6±2.8[5] km/s |
| Proper motion (μ) | RA: +6.43[1] mas/yr Dec.: +5.37[1] mas/yr |
| Parallax (π) | 9.04 ± 0.29 mas[1] |
| Distance | 360 ± 10 ly (111 ± 4 pc) |
| Absolute magnitude (MV) | −0.27[2] |
| Details | |
| Mass | 3.14±0.05[6] M☉ |
| Radius | 3.1[7] R☉ |
| Luminosity | 156+12 −11[6] L☉ |
| Temperature | 10,520+73 −23[6] K |
| Rotational velocity (v sin i) | 95[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 24479 (or H Camelopardalis), is a single[9] star located in the constellation Camelopardalis. It is also known as HR 1204. The star is visible to the naked eye with an apparent visual magnitude of 4.95.[2] Based upon an annual parallax shift of 9.04±0.29 mas as seen from Earth's orbit,[1] it is located around 360 light years from the Sun.
In 1932, HD 24479 was identified as a Be star by Olin C. Wilson at the Mount Wilson Observatory.[10] In 1969, Cowley et al. listed a stellar classification of B9.5 V,[4] matching a B-type main-sequence star. Slettebak (1982) gave it a class of B9 IV,[3] suggesting this instead an evolving subgiant star. It has an estimated 3.14[6] times the mass of the Sun and about 3.1[7] times the Sun's radius. The star is radiating 156[6] times the Sun's luminosity from its photosphere at an effective temperature of 10,520 K.[6]
References
- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b Slettebak, A. (1982), "Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars", Astrophysical Journal Supplement Series, 50: 55–83, Bibcode:1982ApJS...50...55S, doi:10.1086/190820, page 80.
- ^ a b 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.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
- ^ a b c d e f g Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
- ^ a b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (Third ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- ^ "HD 24479". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-05-24.
- ^ 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.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ Wilson, Olin C., Jr. (April 1932), "Three New Be Stars", Publications of the Astronomical Society of the Pacific, 44 (258): 124, Bibcode:1932PASP...44..124W, doi:10.1086/124211.
{{citation}}: CS1 maint: multiple names: authors list (link)
