Astronomy:51 Camelopardalis

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Short description: K-type giant in the constellation Camelopardalis
51 Camelopardalis
Camelopardalis constellation map.svg
Red circle.svg
Location of 51 Cam on the map (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Camelopardalis
Right ascension  07h 46m 40.07812s[1]
Declination +65° 27′ 20.4266″[1]
Apparent magnitude (V) 5.93±0.01[2]
Characteristics
Spectral type K2 III[3]
B−V color index +1.18[4]
Astrometry
Radial velocity (Rv)−30.9±0.2[5] km/s
Proper motion (μ) RA: +27.601[1] mas/yr
Dec.: +17.656[1] mas/yr
Parallax (π)9.7528 ± 0.0372[1] mas
Distance334 ± 1 ly
(102.5 ± 0.4 pc)
Absolute magnitude (MV)+0.92[6]
Details
Mass1.08[7] M☉
Radius11.8+0.3−0.9[8] R☉
Luminosity57.2±0.4[8] L☉
Surface gravity (log g)2.25[9] cgs
Temperature4,626±122[10] K
Metallicity [Fe/H]+0.00[11] dex
Age9.25[7] Gyr
Other designations
51 Cam, BD+65°593, FK5 2602, GC 10420, HD 62066, HIP 37949, HR 2975, SAO 14321[12]
Database references
SIMBADdata

51 Camelopardalis (51 Cam), also designated as HD 62066, is a solitary star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.93.[2] Gaia DR3 parallax measurements imply a distance of 334 light-years[1] and it is currently receding with a heliocentric radial velocity of −30.9 km/s.[5] At its current distance, 51 Cam's brightness is diminished by 0.17 magnitudes due to interstellar extinction[13] and it has an absolute magnitude of +0.92.[6]

51 Cam has a stellar classification of K2 III,[3] indicating that it is an evolved K-type giant star. It has a comparable mass to the Sun[7] but it has more than twice the latter's age at 9.25 billion years.[7] As a result, it has exhausted hydrogen at its core and it has expanded to 11.8 times the radius of the Sun.[8] It radiates 57.2 times the luminosity of the Sun[8] from its enlarged photosphere at an effective temperature of 4,626 K.[10] 51 Cam has a solar metallicity at [Fe/H] = +0.00.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal 81: 187. doi:10.1086/143628. ISSN 0004-637X. Bibcode: 1935ApJ....81..187A. 
  4. ↑ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode: 1970Priv.........0H. 
  5. ↑ 5.0 5.1 Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F. 
  6. ↑ 6.0 6.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  7. ↑ 7.0 7.1 7.2 7.3 Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series 178 (1): 89–101. doi:10.1086/589654. ISSN 0067-0049. Bibcode: 2008ApJS..178...89D. 
  8. ↑ 8.0 8.1 8.2 8.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  9. ↑ 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. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A. 
  10. ↑ 10.0 10.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  11. ↑ 11.0 11.1 Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R. et al. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics 633: A34. doi:10.1051/0004-6361/201936360. ISSN 0004-6361. Bibcode: 2020A&A...633A..34C. 
  12. ↑ "* 51 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+51+Cam. 
  13. ↑ 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. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 



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