18 Camelopardalis
Observation data Epoch J2000 Equinox | |
---|---|
Constellation | Camelopardalis |
Right ascension | 05h 32m 33.7997s[1] |
Declination | +57° 13′ 15.855″[1] |
Apparent magnitude (V) | 6.44[2] |
Characteristics | |
Spectral type | F8 V[3][2] |
U−B color index | +0.11[4] |
B−V color index | +0.587[2] |
Astrometry | |
Radial velocity (Rv) | ±0.0160 +33.264[2] km/s |
Proper motion (μ) | RA: +111.231[1] mas/yr Dec.: −224.686[1] mas/yr |
Parallax (π) | 23.30 ± 0.30[1] mas |
Distance | 140 ± 2 ly (42.9 ± 0.6 pc) |
Absolute magnitude (MV) | +0.076 −0.079 3.234[5] |
Details[6] | |
Mass | +0.015 −0.014 1.201 M☉ |
Luminosity | 4.48[7] L☉ |
Surface gravity (log g) | ±0.02 3.95 cgs |
Temperature | ±38 5,908 K |
Metallicity [Fe/H] | ±0.04 −0.02 dex |
Rotational velocity (v sin i) | 5[8] km/s |
Age | +0.25 −0.19 5.28 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
18 Camelopardalis is a yellow-white hued star in the northern constellation of Camelopardalis. It has an apparent visual magnitude is 6.44.[2] Using the measured annual parallax shift of 23.30 mas, its distance can be estimated at around 140 light years. The star is moving away from the Sun with a radial velocity of +33 km/s[2] and has an annual proper motion of 0.251 arc seconds.[10]
The spectrum of this star matches a stellar classification of F8 V,[2] indicating this is an ordinary F-type main-sequence star. It is around 5.3 billion years old and has 1.2 times the mass of the Sun.[6] The star is radiating 4.5[7] times the Sun's luminosity from its photosphere at an effective temperature of 5,908 K.[6]
References
- 1 2 3 4 5 Gaia Collaboration; et al. (November 2016), "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties", Astronomy & Astrophysics, 595: 23, arXiv:1609.04172, Bibcode:2016A&A...595A...2G, doi:10.1051/0004-6361/201629512, A2.
- 1 2 3 4 5 6 7 Soubiran, C.; et al. (April 2013), "The catalogue of radial velocity standard stars for Gaia. I. Pre-launch release", Astronomy & Astrophysics, 552: 11, arXiv:1302.1905, Bibcode:2013A&A...552A..64S, doi:10.1051/0004-6361/201220927, A64.
- ↑ Balachandran, Suchitra (May 1, 1990), "Lithium depletion and rotation in main-sequence stars", Astrophysical Journal, Part 1, 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.
- ↑ Oja, T. (August 1991), "UBV photometry of stars whose positions are accurately known. VI", Astronomy and Astrophysics Supplement Series, 89 (2): 415–419, Bibcode:1991A&AS...89..415O.
- ↑ Soubiran, C.; Girard, P. (July 2005), "Abundance trends in kinematical groups of the Milky Way's disk", Astronomy and Astrophysics, 438 (1): 1391−51, arXiv:astro-ph/0503498, Bibcode:2005A&A...438..139S, doi:10.1051/0004-6361:20042390.
- 1 2 3 Ramírez, I.; et al. (February 2013), "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo", The Astrophysical Journal, 764 (1): 78, arXiv:1301.1582, Bibcode:2013ApJ...764...78R, doi:10.1088/0004-637X/764/1/78.
- 1 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.
- ↑ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1), Bibcode:1970CoAsi.239....1B.
- ↑ "18 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-26.
- ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854.
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