HD 24479
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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Camelopardalis |
Right ascension | 03h 57m 25.44460s[1] |
Declination | +63° 04′ 20.1498″[1] |
Apparent magnitude (V) | 5.04[2] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | B9 IV[4] or B9.5 V[5] |
U−B color index | −0.16[2] |
B−V color index | −0.10[2] |
Astrometry | |
Radial velocity (Rv) | 4.6±2.8[6] km/s |
Proper motion (μ) | RA: +7.146[1] mas/yr Dec.: +6.420[1] mas/yr |
Parallax (π) | 8.4614 ± 0.0947 mas[1] |
Distance | 385 ± 4 ly (118 ± 1 pc) |
Absolute magnitude (MV) | −0.27[7] |
Details | |
Mass | 3.14±0.05[3] M☉ |
Radius | 4.08±0.20[8] R☉ |
Luminosity | 156+12 −11[3] L☉ |
Surface gravity (log g) | 3.69±0.06[9] cgs |
Temperature | 10,520+72 −73[3] K |
Metallicity [Fe/H] | −0.20[10] dex |
Rotational velocity (v sin i) | 85±16[11] km/s |
Age | 256±20[12] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 24479, also designated as HR 1204, is a solitary,[15] bluish-white hued star located in the northern circumpolar constellation Camelopardalis. The star is visible to the naked eye with an apparent visual magnitude of 5.04.[2] Based on Gaia DR3 parallax measurements,[1] it is located 385 light years from the Sun. However, it is receding with a somewhat constrained heliocentric radial velocity of 4.6 km/s.[6] At its current distance, HD 24479's brightness is diminished by 0.29 magnitudes due to interstellar dust.[16]
In 1932, HD 24479 was identified as a Be star by Olin C. Wilson at the Mount Wilson Observatory.[17] In 1969, astronomer Anne Cowley and her colleauges listed a stellar classification of B9.5 V,[5] matching a B-type main-sequence star. Slettebak (1982) gave it a class of B9 IV,[4] suggesting this instead an evolving subgiant star. Zorec and Royer (2012) model it to be an evolved dwarf star that has completed 85.9% of its main sequence lifetime.[3]
It has an estimated 3.14 times the mass of the Sun[3] and 4.1 times the Sun's radius,[8] which is large for its class. The star is radiating 156 times the Sun's luminosity[8] from its photosphere at an effective temperature of 10,250 K.[3] HD 24479 is estimated to be 256 million years old[12] and is spinning quickly with a projected rotational velocity of 85 km/s.[11]
References
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR Online Data Catalog. Bibcode:2002yCat.2237....0D.
- ^ 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. eISSN 1432-0746. ISSN 0004-6361. S2CID 55586789.
- ^ a b Slettebak, A. (September 1982). "Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars". The Astrophysical Journal Supplement Series. 50: 55. Bibcode:1982ApJS...50...55S. doi:10.1086/190820. eISSN 1538-4365. ISSN 0067-0049.
- ^ a b Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375. Bibcode:1969AJ.....74..375C. doi:10.1086/110819. ISSN 0004-6256.
- ^ a b 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
- ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b c Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
- ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
- ^ Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:1982ApJS...50...55S. doi:10.1086/340590. eISSN 1538-4357. ISSN 0004-637X.
- ^ a b Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38 (11): 694–706. arXiv:1606.09028. Bibcode:2012AstL...38..694G. doi:10.1134/S1063773712110035. eISSN 1562-6873. ISSN 1063-7737. S2CID 255202762.
- ^ Verbunt, F.; van Gent, R. H. (June 2010). "The star catalogue of Hevelius". Astronomy and Astrophysics. 516: A29. Bibcode:2010A&A...516A..29V. doi:10.1051/0004-6361/201014003. eISSN 1432-0746. ISSN 0004-6361.
- ^ "HD 24479". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-05-24.
- ^ Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711.
- ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
- ^ 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. eISSN 1538-3873. ISSN 0004-6280.
External links
- http://www.alcyone.de/cgi-bin/search.pl?object=HR1204 Archived 2011-11-17 at the Wayback Machine
- http://server3.wikisky.org/starview?object_type=1&object_id=1873
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