TV Geminorum

TV Geminorum
Location of TV Geminorum (circled)
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]
Distance1,500[7] pc
Absolute magnitude (MV)-6.31[8]
Details
Mass14[9] M☉
Radius620 – 710 (pulsation)[7] R☉
Luminosity62,000 - 89,000[7] L☉
Temperature3,500 - 3,850[7] K
Other designations
TV Gem, BD+21°1146, SAO 78092, HD 42475, HR 2190, HIP 29416
Database references
SIMBADdata

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.

  1. ^ a b Cite error: The named reference hipparcos was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference vsx was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference ducati was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference famaey was invoked but never defined (see the help page).
  6. ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. ^ a b c d Cite error: The named reference wasatonic was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference levesque was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference stothers was invoked but never defined (see the help page).