Misplaced Pages

HD 88366

Article snapshot taken from[REDACTED] with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Star in the constellation Carina This article is about the Mira variable S Carinae. For s Carinae, see HD 90853.
S Carinae

The visual band light curve of S Carinae, from AAVSO data
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10 09 21.894
Declination −61° 32′ 56.43″
Apparent magnitude (V) 4.5 - 10.0
Characteristics
Evolutionary stage AGB
Spectral type K5e - M6e
U−B color index +0.93 to +1.93
B−V color index +1.43 to +2.60
Variable type Mira
Astrometry
Radial velocity (Rv)289.30 km/s
Proper motion (μ) RA: −94.237 mas/yr
Dec.: 76.811 mas/yr
Parallax (π)2.0110 ± 0.0855 mas
Distance1,620 ± 70 ly
(500 ± 20 pc)
Absolute magnitude (MV)−0.71 to −3.41
Details
Mass0.6 M☉
Radius120 R☉
Luminosity2,200 L☉
Surface gravity (log g)−0.9 - 1.0 cgs
Temperature3,050 - 3,590 K
Other designations
HR 3999, HD 88366, CP−60°1701, HIP 49751, SAO 250840, GC 13971
Database references
SIMBADdata

S Carinae (HD 88366) is a variable star in the constellation Carina.

S Carinae is an M-type red giant with a mean apparent magnitude of +6.94. It is approximately 1,620 light years from Earth. Benjamin Apthorp Gould discovered the variable star, in 1871. It appeared with its variable star designation, S Carinae, in Annie Jump Cannon's 1907 work, Second Catalogue of Variable Stars. It is classified as a Mira type variable star and its brightness varies between magnitude +4.5 and +10.0 with a period of 149.49 days. When it is near its maximum brightness, it is visible to the naked eye. It has one of the earliest spectral types, and hence the hottest temperatures, of any Mira variable, and has a relatively short period for the class. The temperature of this pulsing star is highest at visual brightness maximum and lowest at visual brightness minimum.

S Carinae has exhausted its core hydrogen and expanded to become a red giant. It has also exhausted its core helium and evolved to the asymptotic giant branch, where it fuses hydrogen and helium in separate shells outside the core.

References

  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ 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.
  3. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  4. ^ Eggen, Olin J. (1992). "Asymptotic Giant Branch Stars Near the Sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
  5. ^ Eggen, O. J. (1972). "Narrow-and broad-band photometry of red stars. VII. Luminosities and temperatures for halo-population red stars of high luminosity". The Astrophysical Journal. 172: 639. Bibcode:1972ApJ...172..639E. doi:10.1086/151383.
  6. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. Celis, L. (1995). "Luminosity Attenuation and Distances of Red Giant Stars". The Astrophysical Journal Supplement Series. 98: 701. Bibcode:1995ApJS...98..701C. doi:10.1086/192175.
  8. ^ Willson, L. A.; Wallerstein, G.; Pilachowski, C. A. (1982). "Atmospheric kinematics of high velocity long period variables". Monthly Notices of the Royal Astronomical Society. 198 (2): 483–516. Bibcode:1982MNRAS.198..483W. doi:10.1093/mnras/198.2.483.
  9. ^ Shinkawa, Donna (1973). "The Mira Variable S Carinae". The Astrophysical Journal Supplement Series. 25: 253. Bibcode:1973ApJS...25..253S. doi:10.1086/190269.
  10. Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 8 January 2025.
  11. ^ Schultheis, M.; Glass, I. S. (2001). "Asymptotic giant branch variables in Baade's Windows". Monthly Notices of the Royal Astronomical Society. 327 (4): 1193–1200. Bibcode:2001MNRAS.327.1193S. doi:10.1046/j.1365-8711.2001.04825.x.
Constellation of Carina
Stars
Bayer
Variable
HR
HD
Other
Exoplanets
Star
clusters
NGC
Other
Nebulae
NGC
Other
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
Category
Categories:
HD 88366 Add topic