S Cassiopeiae

Not to be confused with Sigma Cassiopeiae.
S Cassiopeiae

Location of S Cas
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 01h 19m 41.99s[1]
Declination 72° 36′ 40.8″[1]
Apparent magnitude (V) +7.9 – +16.1[2]
Characteristics
Spectral type S3,4 – S5,8[3]
Variable type Mira[2]
Astrometry
Proper motion (μ) RA: 3.201[4] mas/yr
Dec.: 1.056[4] mas/yr
Parallax (π)1.0515 ± 0.0907 mas[5]
Distance3,100 ± 300 ly
(950 ± 80 pc)
Details
Radius930[6] R☉
Luminosity5,210[7] L☉
Temperature1,800[8] K
Other designations
S Cas, HD 7769, BD+71°66, 2MASS J01194198+7236407, GSC 04305-01322, IRAS 01159+7220, IRC+70024, AAVSO 0112+72
Database references
SIMBADdata

S Cassiopeiae (S Cas, HD 7769) is a Mira variable and S-type star in the constellation Cassiopeia. It is an unusually cool star, rapidly losing mass and surrounded by dense gas and dust producing masers.

  1. ^ a b Cite error: The named reference 2mass was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Ramstedt was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference dr2 was invoked but never defined (see the help page).
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ Cite error: The named reference Ramstedt2009 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference mcdonald was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference ramstedt2014 was invoked but never defined (see the help page).