HR 244
HR 244 is a single[7] star in the constellation Cassiopeia. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 4.80.[2] Based upon parallax measurements, it is located at a distance of 61 light years from the Sun, and is drifting further away with a radial velocity of +20.7 km/s;[1] around 546,000 years ago it passed within 38 light-years of the Sun.[4] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.183 arcseconds per annum.[8]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cassiopeia |
Right ascension | 00h 53m 04.195899s[1] |
Declination | +61° 07′ 26.3018″[1] |
Apparent magnitude (V) | 4.80[2] |
Characteristics | |
Evolutionary stage | main sequence |
Spectral type | F9V[3] |
B−V color index | 0.540±0.008[4] |
Astrometry | |
Radial velocity (Rv) | +20.682±0.001[1] km/s |
Proper motion (μ) | RA: –68.016[1] mas/yr Dec.: +169.274[1] mas/yr |
Parallax (π) | 53.1896 ± 0.1273[1] mas |
Distance | 61.3 ± 0.1 ly (18.80 ± 0.04 pc) |
Absolute magnitude (MV) | 3.44[4] |
Details | |
Mass | 1.194[5] M☉ |
Radius | 1.74+0.06 −0.03[1] R☉ |
Luminosity | 3.78±0.01[1] L☉ |
Surface gravity (log g) | 0.53[2] cgs |
Temperature | 6,105+45 −105[1] K |
Metallicity [Fe/H] | 0.04[5] dex |
Rotational velocity (v sin i) | 8.1[2] km/s |
Age | 5.3[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This object is an F-type main-sequence star with a stellar classification of F9V,[3] a star that is currently fusing its core hydrogen. It is 5.3[5] billion years old and is spinning with a projected rotational velocity of 8 km/s.[2] The star has 1.2[5] times the mass of the Sun and 1.7[1] times the Sun's radius. It is radiating 3.78 times the luminosity of the Sun from its photosphere at an effective temperature of 6,105 K.[1]
References
- 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.
- Luck, R. Earle (January 2017), "Abundances in the Local Region II. F, G, and K Dwarfs and Subgiants", The Astronomical Journal, 153 (1): 19, arXiv:1611.02897, Bibcode:2017AJ....153...21L, doi:10.3847/1538-3881/153/1/21, 21.
- Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode:2009ApJS..180..117A, doi:10.1088/0067-0049/180/1/117.
- 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.
- Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 40, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40.
- "HD 5015". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-02.
- 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.
- 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.