SS Cephei

SS Cephei
Observation data
Epoch J2000      Equinox ICRS
Constellation Cepheus
Right ascension 03h 49m 30.0153s
Declination +80° 19′ 20.902″
Apparent magnitude (V) 6.9 - 7.9
Characteristics
Evolutionary stage AGB
Spectral type M5III
Variable type SRb
Astrometry
Radial velocity (Rv)−46.87±0.09 km/s
Proper motion (μ) RA: −4.911 mas/yr
Dec.: 12.062 mas/yr
Parallax (π)3.9187±0.1886 mas
Distance830 ± 40 ly
(260 ± 10 pc)
Absolute magnitude (MV)+0.13
Details
Mass3.7 M☉
Radius239 R☉
Luminosity5,021 L☉
Surface gravity (log g)2.33 cgs
Temperature3,830 K
Metallicity [Fe/H]−0.32 dex
Other designations
BD+79°110, HD 22689, HIP 17881, SAO 594
Database references
SIMBADdata

SS Cephei is a semiregular variable star in the constellation Cepheus. It is of spectral type M5III, and has an estimated temperature of about 3,700 K. The star is about 830 light-years (260 parsecs) from Earth. The brightness of SS Cephei varies between magnitude 6.9 and 7.9.

A light curve for SS Cephei, plotted from Hipparcos data

See also

References

  1. ↑ "obj-Cep". britastro.org. Retrieved 2024-09-27.
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
  4. ↑ Olofsson, H.; González Delgado, D.; Kerschbaum, F.; Schöier, F. L. (2002). "Mass loss rates of a sample of irregular and semiregular M-type AGB-variables". Astronomy and Astrophysics. 391 (3): 1053. arXiv:astro-ph/0206172. Bibcode:2002A&A...391.1053O. doi:10.1051/0004-6361:20020841.
  5. 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.
  6. ↑ Famaey, B.; et al. (May 2009). "Spectroscopic binaries among Hipparcos M giants. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics. 498 (2): 627–640. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698. S2CID 18739721.
  7. 1 2 3 4 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
  8. 1 2 McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433.
  9. ↑ "V* SS Cep". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-02-28.
  10. ↑ EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series. 1200. Noordwijk, Netherlands: ESA Publications Division. Bibcode:1997HIP...C......0E. ISBN 9290923997. Retrieved 3 October 2024.{{cite journal}}: CS1 maint: periodical has ISBN (link)