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Mu Pegasi
Star in the constellation Pegasus / From Wikipedia, the free encyclopedia
Mu Pegasi or μ Pegasi, formally named Sadalbari (/ˌsædəlˈbɛəri/),[10] is a star in the northern constellation of Pegasus. The apparent visual magnitude of this star is 3.5,[2] which is bright enough to be seen with the naked eye even on a moonlit night. Based upon parallax measurements taken by the Gaia spacecraft, it is approximately 113 light-years (35 parsecs) from the Sun.[1]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Pegasus |
Right ascension | 22h 50m 00.19307s[1] |
Declination | +24° 36′ 05.6926″[1] |
Apparent magnitude (V) | 3.514[2] |
Characteristics | |
Evolutionary stage | Yellow giant |
Spectral type | G8 III[3] |
U−B color index | +0.674[2] |
B−V color index | +0.932[2] |
Astrometry | |
Radial velocity (Rv) | +13.54 ± 0.20[4] km/s |
Proper motion (μ) | RA: +145.240 mas/yr[1] Dec.: −42.396 mas/yr[1] |
Parallax (π) | 28.934 ± 0.189 mas[1] |
Distance | 112.7 ± 0.7 ly (34.6 ± 0.2 pc) |
Absolute magnitude (MV) | +0.432[5] |
Details | |
Mass | 2.59±0.05[6] M☉ |
Radius | 9.32±0.47[7] R☉ |
Luminosity | 46.9±0.6[8] L☉ |
Surface gravity (log g) | 2.85±0.03[8] cgs |
Temperature | 4,961±40[8] K |
Metallicity [Fe/H] | −0.03±0.02[8] dex |
Rotational velocity (v sin i) | 0.95±0.45[6] km/s |
Age | 520±30[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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