23 Camelopardalis

23 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis, located 433 light years away from the Sun.[1] It is just visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 6.17.[2] The object is moving closer to the Sun with a heliocentric radial velocity of −2.5 km/s.[1]

23 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 44m 08.44597s[1]
Declination +61° 28′ 35.5255″[1]
Apparent magnitude (V) 6.168[2]
Characteristics
Spectral type G5 III:[2]
B−V color index 0.881[2]
Astrometry
Radial velocity (Rv)−2.47±0.17[1] km/s
Proper motion (μ) RA: −11.312[1] mas/yr
Dec.: +0.766[1] mas/yr
Parallax (π)7.5250 ± 0.0371 mas[1]
Distance433 ± 2 ly
(132.9 ± 0.7 pc)
Absolute magnitude (MV)0.95[3]
Details
Mass2.13[2] M☉
Radius9.84[1] R☉
Luminosity60.255[1] L☉
Surface gravity (log g)3.15±0.18[4] cgs
Temperature5,183±51[4] K
Metallicity [Fe/H]−0.01±0.05[4] dex
Age1.50[2] Gyr
Other designations
23 Cam, BD+61°816, HD 37638, HIP 27046, HR 1943, SAO 13590[5]
Database references
SIMBADdata

With a stellar classification of G5 III:,[2] 23 Camelopardalis appears to be an aging giant star that has exhausted the hydrogen at its core and evolved away from the main sequence, although the ':' denotes some uncertainty about the classification. It is a red clump giant,[6] which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is 1.5[2] billion years old with more than double[2] the mass of the Sun and almost 10[1] times the Sun's radius. It is radiating 60[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,183 K.[4]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3), 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
  3. 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, S2CID 119257644.
  4. da Silva, R.; et al. (February 2011), "Homogeneous photospheric parameters and C abundances in G and K nearby stars with and without planets", Astronomy and Astrophysics, 526: 13, arXiv:1011.5768, Bibcode:2011A&A...526A..71D, doi:10.1051/0004-6361/201015907, S2CID 118803404, A71.
  5. "23 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-17.
  6. Mishenina, T. V.; et al. (September 2006), "Elemental abundances in the atmosphere of clump giants", Astronomy and Astrophysics, 456 (3): 1109–1120, arXiv:astro-ph/0605615, Bibcode:2006A&A...456.1109M, doi:10.1051/0004-6361:20065141, S2CID 18764566.
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