40 Camelopardalis

40 Camelopardalis is a single[7] star in the northern circumpolar constellation of Camelopardalis,[6] located around 600 light years distant from the Sun.[1] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.37.[2] This object is moving further from the Earth with a heliocentric radial velocity of +8.6 km/s.[4]

40 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 06h 15m 40.53373s[1]
Declination +59° 59′ 56.2694″[1]
Apparent magnitude (V) 5.37[2]
Characteristics
Spectral type K3 III[3]
B−V color index 1.339±0.006[2]
Astrometry
Radial velocity (Rv)+8.56±0.29[4] km/s
Proper motion (μ) RA: +28.036[1] mas/yr
Dec.: −21.454[1] mas/yr
Parallax (π)5.3947 ± 0.1267[1] mas
Distance600 ± 10 ly
(185 ± 4 pc)
Absolute magnitude (MV)−0.52[2]
Details
Radius39.12+0.60
−0.75[1] R☉
Luminosity424±12[1] L☉
Surface gravity (log g)2.10[3] cgs
Temperature4,187.5+96.8
−31.5[1] K
Metallicity [Fe/H]0.00[3] dex
Rotational velocity (v sin i)2.2[5] km/s
Other designations
40 Cam, BD+60°938, GC 7949, HD 42633, HIP 29730, HR 2201, SAO 13772, WDS J06157+6000A[6]
Database references
SIMBADdata

This is an aging giant star with a stellar classification of K3 III,[3] having exhausted the hydrogen at its core and evolved away from the main sequence. It has expanded to 39[1] times the Sun's radius and is radiating 424[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,188 K.[1]

There is a magnitude 11.50 optical companion, located at an angular separation of 104.20″ along a position angle of 355° from 40 Camelopardalis, as of 2010.[8]

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. 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.
  3. McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
  4. 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.
  5. De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
  6. "40 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-18.
  7. 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.
  8. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920
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