Astronomy:Sigma Persei
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Short description: Star in the constellation Perseus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 30m 34.48545s[1] |
| Declination | 47° 59′ 42.7808″[1] |
| Apparent magnitude (V) | 4.36[2] |
| Characteristics | |
| Spectral type | K3III[3] |
| U−B color index | +1.54[2] |
| B−V color index | +1.35[2] |
| Astrometry | |
| Radial velocity (Rv) | +14.36[4] km/s |
| Proper motion (μ) | RA: +3.56[1] mas/yr Dec.: +18.48[1] mas/yr |
| Parallax (π) | 9.07 ± 0.26[1] mas |
| Distance | 360 ± 10 ly (110 ± 3 pc) |
| Absolute magnitude (MV) | -0.85[5] |
| Details | |
| Mass | 1.32[6] M☉ |
| Radius | 36.89[6] R☉ |
| Luminosity | 368[6] L☉ |
| Surface gravity (log g) | 1.46[6] cgs |
| Temperature | 4,165[6] K |
| Metallicity [Fe/H] | -0.20[6] dex |
| Rotational velocity (v sin i) | < 1.0[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Sigma Persei (Sigma Per, σ Persei, σ Per) is an orange K-type giant[3] with an apparent magnitude of +4.36.[2] It is approximately 360 light years from Earth.[1]
Sigma Persei is moving through the Galaxy at a speed of 17.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 43,600 light years from the center of the Galaxy. It came closest to the Sun 5.1 million years ago when it had brightened to magnitude 3.11 from a distance of 202 light years.[8]
It has one reported planet, b, with a period of 580 days and a mass approximately 6.5 times that of Jupiter.[9]
Name and etymology
This star, together with δ Per, ψ Per, α Per, γ Per and η Per, has been called the Segment of Perseus.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D.
- ↑ 3.0 3.1 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H.
- ↑ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy & Astrophysics 430: 165–186. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F.
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. Vizier catalog entry
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics 574: A116. doi:10.1051/0004-6361/201322360. Bibcode: 2015A&A...574A.116R. Vizier catalog entry
- ↑ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series 139 (3): 433. doi:10.1051/aas:1999401. Bibcode: 1999A&AS..139..433D. Vizier catalog entry
- ↑ Sigma Persei (HIP 16335)
- ↑ Lee, Byeong-Cheol; Han, Inwoo; Park, Myeong-Gu; Mkrtichian, David E.; Jeong, Gwanghui; Kim, Kang-Min; Valyavin, Gennady (2014). "PLANETARY COMPANION IN K GIANT σ PERSEI". Journal of the Korean Astronomical Society 47 (2): 69. doi:10.5303/JKAS.2014.47.2.69. Bibcode: 2014JKAS...47...69L.
- ↑ Allen, R. H. (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York: Dover Publications Inc.. p. 331. ISBN 0-486-21079-0. https://archive.org/details/starnamestheirlo00alle/page/331. Retrieved 2012-09-04.
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