Astronomy:8 Camelopardalis
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| Distance | 750 ± 10 ly (229 ± 3 pc) |
| Absolute magnitude (MV) | −0.11[2] |
| Details | |
| Mass | 1.13[5] M☉ |
| Radius | 30.19±3.31[3] R☉ |
| Luminosity | 341±6[1] L☉ |
| Surface gravity (log g) | 2.8[3] cgs |
| Temperature | 4,257+978 −190[1] K |
| Metallicity [Fe/H] | +0.06[3] dex |
| Rotational velocity (v sin i) | 1.6[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
8 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis.[7] 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.[8]
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
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 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.
- ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 3.3 3.4 Baines, Ellyn K. et al. (September 2016), "Spectroscopic and Interferometric Measurements of Nine K Giant Stars", The Astronomical Journal 152 (3): 8, doi:10.3847/0004-6256/152/3/66, 66, Bibcode: 2016AJ....152...66B.
- ↑ 4.0 4.1 Appenzeller, Immo (April 1967), "MK Spectral Types for 185 Bright Stars", Publications of the Astronomical Society of the Pacific 79 (467): 102, doi:10.1086/128449, Bibcode: 1967PASP...79..102A.
- ↑ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics 628: A94, doi:10.1051/0004-6361/201935765, Bibcode: 2019A&A...628A..94A.
- ↑ De Medeiros, J. R. et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics 363: 239–243, Bibcode: 2000A&A...363..239D.
- ↑ 7.0 7.1 "8 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=8+Cam.
- ↑ 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, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F.
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