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Mu Geminorum
Star in the constellation Gemini / From Wikipedia, the free encyclopedia
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Mu Geminorum or μ Geminorum, formally named Tejat (/ˈtiːdʒət/),[13] is a single star in the northern constellation of Gemini. From parallax measurements obtained during the Hipparcos mission, it is roughly 230 light-years (71 parsecs) distant from the Sun.[1] The position of the star near the ecliptic means that it is subject to lunar occultations.[14]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Gemini |
Right ascension | 06h 22m 57.62686s[1] |
Declination | +22° 30′ 48.8979″[1] |
Apparent magnitude (V) | 2.75 - 3.02[2] |
Characteristics | |
Evolutionary stage | asymptotic giant branch[3] |
Spectral type | M3 III[4] |
U−B color index | +1.924[5] |
B−V color index | +1.643[5] |
Variable type | LB[2] |
Astrometry | |
Radial velocity (Rv) | +54.38±0.24[6] km/s |
Proper motion (μ) | RA: +56.39[1] mas/yr Dec.: –110.03[1] mas/yr |
Parallax (π) | 14.08 ± 0.71 mas[1] |
Distance | 230 ± 10 ly (71 ± 4 pc) |
Absolute magnitude (MV) | −1.42[7] |
Details | |
Mass | 1.9[8] M☉ |
Radius | 91.4,[8] 108,[9] 129.5[10][lower-alpha 1] R☉ |
Luminosity | 1,430[8] – 2,754[10] L☉ |
Surface gravity (log g) | 0.79[8] cgs |
Temperature | 3702±128[8] K |
Metallicity [Fe/H] | −0.05[8] dex |
Rotational velocity (v sin i) | 8.4[11] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Close
Mu Geminorum forms the primary or 'A' component of a double star system designated WDS J06230+2231 along with UCAC2 39641417[15] (also designated WDS J06230+2231BC), itself a binary pair.[16]