Epsilon Geminorum

ε Geminorum
Location of ε Geminorum (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Gemini
Right ascension 06h 43m 55.927s[1]
Declination +25° 07′ 52.06″[1]
Apparent magnitude (V) +3.06[2]
Characteristics
Spectral type G8 Ib[3]
U−B color index +1.46[4]
B−V color index +1.40[4]
Astrometry
Radial velocity (Rv)+8.09±0.14[5] km/s
Proper motion (μ) RA: −4.835 mas/yr[1]
Dec.: −11.78 mas/yr[1]
Parallax (π)3.748 ± 0.184 mas[1]
Distance861+52
−39 ly
(264+16
−12 pc)[6]
Absolute magnitude (MV)−4.33±0.10[7]
Details
Mass5.29±0.04[8] – 8.2±0.82[9] M☉
Radius130.2+5.5
−6.0[8] R☉
Luminosity6,980[9] L☉
Surface gravity (log g)0.76[8]–1.38[9] cgs
Temperature4,591±11[9] K
Metallicity [Fe/H]0.15±0.07[10] dex
Rotational velocity (v sin i)9.08[9] km/s
Age100[8] Myr
Other designations
Epsilon Gem, ε Gem, 27 Geminorum, FK5 254, HD 48329, HIP 32246, HR 2473, SAO 78682
Database references
SIMBADdata

Epsilon Geminorum or ε Geminorum, formally named Mebsuta /mɛbˈsuːtə/,[11][12] is a star in the constellation of Gemini, on the outstretched right 'leg' of the twin Castor. The apparent visual magnitude of +3.06[2] makes it one of the brighter stars in this constellation. The distance to this star is determined at 860 light-years (260 parsecs).[6]

  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Cite error: The named reference aaa352_495 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference aj118_6_3032 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
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  6. ^ a b Cite error: The named reference b-j was invoked but never defined (see the help page).
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  8. ^ a b c d Cite error: The named reference baines2018 was invoked but never defined (see the help page).
  9. ^ a b c d e Cite error: The named reference rosas-portilla was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference aaa525_A71 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Davis44 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference IAU-CSN was invoked but never defined (see the help page).