TV Geminorum
Star in the constellation Gemini / From Wikipedia, the free encyclopedia
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TV Geminorum (TV Gem / HD 42475 / HR 2190) is a variable red supergiant in the constellation Gemini. Its visual magnitude varies from 6.3 to 7.5.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Gemini |
Right ascension | 06h 11m 51.41401s[1] |
Declination | 21° 52′ 05.6452″[1] |
Apparent magnitude (V) | 6.27 - 7.50[2] |
Characteristics | |
Spectral type | K5.5 - M1.3 Iab[3] + B4 III:[2] |
U−B color index | +1.77[4] |
B−V color index | +2.25[4] |
Variable type | SRc[3] |
Astrometry | |
Radial velocity (Rv) | +20.42[5] km/s |
Proper motion (μ) | RA: −0.575[6] mas/yr Dec.: −2.598[6] mas/yr |
Parallax (π) | 0.3197 ± 0.1301 mas[6] |
Distance | 1,500[7] pc |
Absolute magnitude (MV) | -6.31[8] |
Details | |
Mass | 14[9] M☉ |
Radius | 620 – 710 (pulsation)[7] R☉ |
Luminosity | 62,000 - 89,000[7] L☉ |
Temperature | 3,500 - 3,850[7] K |
Other designations | |
Database references | |
SIMBAD | data |
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