8 Camelopardalis

8 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis.[6] It is a challenge to view with the naked eye, appearing as a dim, orange-hued star with an apparent visual magnitude of 6.09.[2] Based upon parallax, it is located around 750 light years away from the Sun.[1] At that distance, the visual magnitude is diminished by an extinction of 0.58 due to interstellar dust.[7]

8 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 04h 59m 46.32836s[1]
Declination +53° 09′ 19.6253″[1]
Apparent magnitude (V) 6.09[2]
Characteristics
Evolutionary stage giant[3]
Spectral type K4 III[4]
B−V color index 1.462±0.009[2]
Astrometry
Radial velocity (Rv)−0.01±0.13[1] km/s
Proper motion (μ) RA: −13.532[1] mas/yr
Dec.: −10.700[1] mas/yr
Parallax (π)4.3709 ± 0.0613[1] mas
Distance750 ± 10 ly
(229 ± 3 pc)
Absolute magnitude (MV)−0.11[2]
Details
Radius30.19±3.31[3] R☉
Luminosity341±6[1] L☉
Surface gravity (log g)2.8[3] cgs
Temperature4,257+978
−190[1] K
Metallicity [Fe/H]+0.06[3] dex
Rotational velocity (v sin i)1.6[5] km/s
Other designations
8 Cam, BD+52°906, HD 31579, HIP 23216, HR 1588, SAO 24943[6]
Database references
SIMBADdata

This is an aging K-type giant star with a stellar classification of K4 III,[4] which indicates it has exhausted the hydrogen at its core and evolved away from the main sequence. The star has expanded to 30[3] times the radius of the Sun and is radiating 341[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,257 K.[1]

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. Baines, Ellyn K.; et al. (September 2016), "Spectroscopic and Interferometric Measurements of Nine K Giant Stars", The Astronomical Journal, 152 (3): 8, arXiv:1609.02379, Bibcode:2016AJ....152...66B, doi:10.3847/0004-6256/152/3/66, 66.
  4. Appenzeller, Immo (April 1967), "MK Spectral Types for 185 Bright Stars", Publications of the Astronomical Society of the Pacific, 79 (467): 102, Bibcode:1967PASP...79..102A, doi:10.1086/128449.
  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. "8 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-15.
  7. Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272.
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