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HD 24479

Location of HD 117566 on the map (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Camelopardalis
Right ascension	03 57 25.44460
Declination	+63° 04′ 20.1498″
Apparent magnitude (V)	5.04
Characteristics
Evolutionary stage	main sequence
Spectral type	B9 IV or B9.5 V
U−B color index	−0.16
B−V color index	−0.10
Astrometry
Radial velocity (Rv)	4.6±2.8 km/s
Proper motion (μ)	RA: +7.146 mas/yr Dec.: +6.420 mas/yr
Parallax (π)	8.4614 ± 0.0947 mas
Distance	385 ± 4 ly (118 ± 1 pc)
Absolute magnitude (MV)	−0.27
Details
Mass	3.14±0.05 M☉
Radius	4.08±0.20 R☉
Luminosity	156 −11 L☉
Surface gravity (log g)	3.69±0.06 cgs
Temperature	10,520 −73 K
Metallicity	−0.20 dex
Rotational velocity (v sin i)	85±16 km/s
Age	256±20 Myr
Other designations
22 H. Camelopardalis,AG+62°326, BD+62°628, FK5 2281, GC 4730, HD 24479, HIP 18505, HR 1204, SAO 12969
Database references
SIMBAD	data

HD 24479, also designated as HR 1204, is a solitary, 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. Based on Gaia DR3 parallax measurements, 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. At its current distance, HD 24479's brightness is diminished by 0.29 magnitudes due to interstellar dust.

In 1932, HD 24479 was identified as a Be star by Olin C. Wilson at the Mount Wilson Observatory. In 1969, astronomer Anne Cowley and her colleauges listed a stellar classification of B9.5 V, matching a B-type main-sequence star. Slettebak (1982) gave it a class of B9 IV, 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.

It has an estimated 3.14 times the mass of the Sun and 4.1 times the Sun's radius, which is large for its class. The star is radiating 156 times the Sun's luminosity from its photosphere at an effective temperature of 10,250 K. HD 24479 is estimated to be 256 million years old and is spinning quickly with a projected rotational velocity of 85 km/s.

References

1. ^ 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.
2. ^ 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.
3. ^ 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.
4. ^ 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.
5. ^ 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.
6. ^ 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.
7. 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.
8. ^ 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.
9. 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.
10. 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.
11. ^ 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.
12. ^ 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.
13. 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.
14. "HD 24479". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-05-24.
15. 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.
16. 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.
17. 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

v t e Constellation of Camelopardalis
Camelopardalis in Chinese astronomy List of stars in Camelopardalis
Stars	Bayer α β γ Flamsteed 1 2 3 4 5 7 8 11 12 14 15 16 17 18 19 20 21 22 23 24 26 28 29 30 31 33 34 35 36 37 38 39 40 41 42 43 49 51 53 Variable U Z RU ST TX VZ BD BE BK BN CE CO CQ CS DD MY HR 967 1046 1073 1112 1124 1129 1138 1158 1192 1204 1205 1241 1242 1305 1313 1314 1327 1335 1342 1401 1440 1491 1527 1561 1624 1636 (Mago) 1675 1683 1686 1720 1844 1916 2209 2363 2396 2401 2527 2581 2830 3075 3082 3216 4062 4084 4609 (Tonatiuh) 4892 4893 5009 5091 5203 HD 35759 Other 2MASS J05325346+8246465 Gliese 445 NGC 2363-V1 PSR B0329+54 Stein 2051 Struve 1694 XO-3 XO-6
Exoplanets HD 32518 b HD 33564 b HD 104985 b XO-3b XO-6b
Star clusters NGC 1502
Nebulae IC 3568 (Lemon Slice Nebula) M4-18 NGC 1501 NGC 2404
Galaxies	NGC 1530 1560 1569 1573 1573A 1961 2146 2336 2363 2366 2403 2441 2460 2523 2655 2715 2748 5640 Other DDO 44 IC 342 IRAS 07598+6508 MACS0647-JD UGC 3478 UGC 3730 UGCA 86
Galaxy clusters MACS J0647.7+7015 MS 0735.6+7421
Astronomical events SN 1996ah GRB 970508 SN 2004dj SN 2010lt
Category

• B-type main-sequence stars
• B-type subgiants
• Camelopardalis
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects