S Pegasi

S Pegasi

The visual band light curve of S Pegasi, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Pegasus
Right ascension 23h 20m 32.61407s[2]
Declination +08° 55′ 08.1398″[2]
Apparent magnitude (V) 6.9 - 13.8[3]
Characteristics
Spectral type M5e - M8.5e[3]
Variable type Mira[3]
Astrometry
Parallax (π)2.52 ± 2.26 mas[2]
Distanceapprox. 1,000 ly
(approx. 400 pc)
Details
Radius459 - 574[4] R☉
Luminosity3,221[5] L☉
Temperature2,107[5] K
Other designations
S Peg, BD+08° 5047a, HD 220033, HIP 115242
Database references
SIMBADdata

S Pegasi (S Peg) is a Mira variable star in the constellation Pegasus. It varies between magnitude 7 and 13 with a period of 319.22 days.[3] It is believed to be pulsating in the first overtone. First overtone pulsators have masses less than 1.8 M☉ at a temperature of 2,107 K, and less than 1.4 M☉ at the luminosity of S Pegasi.[5]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference hipparcos was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference vanbelle was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference serkowski was invoked but never defined (see the help page).