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] |
Distance | approx. 1,000 ly (approx. 400 pc) |
Details | |
Radius | 459 - 574[4] R☉ |
Luminosity | 3,221[5] L☉ |
Temperature | 2,107[5] K |
Other designations | |
Database references | |
SIMBAD | data |
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]