Astronomy:SS Cephei
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Short description: Variable star in the constellation Cepheus
SS Cephei, as seen during the Sloan Digital Sky Survey | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 03h 49m 30.0153s[2] |
| Declination | +80° 19′ 20.902″[2] |
| Apparent magnitude (V) | 6.9 - 7.9[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M5III[5] |
| Variable type | SRb[3] |
| Astrometry | |
| Radial velocity (Rv) | −46.87±0.09[6] km/s |
| Proper motion (μ) | RA: −4.911[2] mas/yr Dec.: 12.062[2] mas/yr |
| Parallax (π) | 3.9187 ± 0.1886[2] mas |
| Distance | 830 ± 40 ly (260 ± 10 pc) |
| Absolute magnitude (MV) | +0.13[5] |
| Details | |
| Mass | 3.7[7] M☉ |
| Radius | 239[8] R☉ |
| Luminosity | 5,021[8] L☉ |
| Surface gravity (log g) | 2.33[7] cgs |
| Temperature | 3,830[7] K |
| Metallicity [Fe/H] | −0.32[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
See also
- S Cephei
- List of variable stars
References
- ↑ "obj-Cep". https://britastro.org/vss/obj-cep.html.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 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. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
- ↑ 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. doi:10.1051/0004-6361:20020841. Bibcode: 2002A&A...391.1053O.
- ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 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. doi:10.1051/0004-6361/200810698. Bibcode: 2009A&A...498..627F.
- ↑ 7.0 7.1 7.2 7.3 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ 8.0 8.1 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. doi:10.1093/mnras/stx1433. Bibcode: 2017MNRAS.471..770M.
- ↑ "V* SS Cep". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+SS+Cep.
- ↑ EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series (Noordwijk, Netherlands: ESA Publications Division) 1200. ISBN 9290923997. Bibcode: 1997HIP...C......0E. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats. Retrieved 3 October 2024.
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