RS Persei

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RS Persei
The Double Cluster.jpg
RS Persei is the red star closest to the centre of NGC 884, the right hand cluster (north is down).
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 2h 22m 24.288s[1]
Declination +57° 0.6′ 34.08″[1]
Apparent magnitude (V) 7.82-10.0[2]
Spectral type M4Iab[3]
Variable type SRc[2]
Radial velocity (Rv)−38.0±2[4] km/s
Proper motion (μ) RA: −0.371±0.137[5] mas/yr
Dec.: −0.931±0.165[5] mas/yr
Parallax (π)0.6437 ± 0.0822[5] mas
Distance2,345±55[6] pc
Absolute magnitude (MV)−6.18[7]
Mass12-15 M
Radius770±30 R
Diameter770±30 D
Surface gravity (log g)−0.2±0.05 cgs
Temperature3,470±90 K
Other designations
RS Per, HD 14488, BD +56°583, 2MASS J02222428+5706340, AAVSO 0215+56A
Database references

RS Persei is a red supergiant variable star located in the Double Cluster in Perseus.


  1. 1.0 1.1 Cutri, R. M; Skrutskie, M. F; Van Dyk, S; Beichman, C. A; Carpenter, J. M; Chester, T; Cambresy, L; Evans, T et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally published in: 2003y Cat.2246....0C 2246. Bibcode 2003yCat.2246....0C.
  2. 2.0 2.1 Samus', N. N.; Goranskii, V. P.; Durlevich, O. V.; Zharova, A. V.; Kazarovets, E. V.; Kireeva, N. N.; Pastukhova, E. N.; Williams, D. B. et al. (2003). "An Electronic Version of the Second Volume of the General Catalogue of Variable Stars with Improved Coordinates". Astronomy Letters 29 (7): 468. Bibcode 2003AstL...29..468S. doi:10.1134/1.1589864.
  3. Saesen, S.; Carrier, F.; Pigulski, A.; Aerts, C.; Handler, G.; Narwid, A.; Fu, J. N.; Zhang, C. et al. (2010). "Photometric multi-site campaign on the open cluster NGC 884". Astronomy and Astrophysics 515: A16. arXiv:1001.1116. Bibcode 2010A&A...515A..16S. doi:10.1051/0004-6361/200913236. ISSN 0004-6361.
  4. Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode 1953GCRV..C......0W.
  5. 5.0 5.1 5.2 Brown, A. G. A. (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.
  6. 6.0 6.1 Baron, F.; Monnier, J. D.; Kiss, L. L.; Neilson, H. R.; Zhao, M.; Anderson, M.; Aarnio, A.; Pedretti, E. et al. (2014). "CHARA/MIRC Observations of Two M Supergiants in Perseus OB1: Temperature, Bayesian Modeling, and Compressed Sensing Imaging". The Astrophysical Journal 785: 46. arXiv:1405.4032. Bibcode 2014ApJ...785...46B. doi:10.1088/0004-637X/785/1/46.
  7. Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal 628 (2): 973. arXiv:astro-ph/0504337. Bibcode 2005ApJ...628..973L. doi:10.1086/430901.

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