K2-229

K2-229
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 12h 27m 29.5848s[1]
Declination −06° 43′ 18.7660″[1]
Apparent magnitude (V) 10.985
Characteristics
Evolutionary stage Main sequence
Spectral type K2V[2]
Astrometry
Proper motion (μ) RA: −80.886±0.131[1] mas/yr
Dec.: 7.434±0.090[1] mas/yr
Parallax (π)9.7229 ± 0.1020 mas[1]
Distance335 ± 4 ly
(103 ± 1 pc)
Details
Mass0.837 +0.019
−0.025[2] M☉
Radius0.793 +0.032
−0.020[2] R☉
Luminosity~0.407[3] L☉
Surface gravity (log g)4.56 +0.03
−0.05[2] cgs
Temperature5185 ± 32[2] K
Metallicity [Fe/H]−0.06 ± 0.02[2] dex
Rotation18.1 ± 0.3 days[2]
Rotational velocity (v sin i)2.4 ± 0.5[2] km/s
Age5.4 +5.2
−3.7[2] Gyr
Other designations
EPIC 228801451, TYC 4947-834-1, 2MASS J12272958-0643188
Database references
SIMBADdata

K2-229 (also designated EPIC 228801451 or TYC 4947-834-1) is a K-type main sequence star approximately 103 parsecs (335 light years) away in the constellation Virgo. It was observed by the Kepler Space Telescope during its K2 "Second Light" mission in Campaign 10.

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i Santerne, A.; Brugger, B.; Armstrong, D. J.; Adibekyan, V.; Lillo-Box, J.; Gosselin, H.; Aguichine, A.; Almenara, J.-M.; Barrado, D.; Barros, S. C. C.; Bayliss, D.; Boisse, I.; Bonomo, A. S.; Bouchy, F.; Brown, D. J. A.; Deleuil, M.; Delgado Mena, E.; Demangeon, O.; Díaz, R. F.; Doyle, A.; Dumusque, X.; Faedi, F.; Faria, J. P.; Figueira, P.; Foxell, E.; Giles, H.; Hébrard, G.; Hojjatpanah, S.; Hobson, M.; et al. (2018). "An Earth-sized exoplanet with a Mercury-like composition". Nature Astronomy. 2 (5): 393–400. arXiv:1805.08405. Bibcode:2018NatAs...2..393S. doi:10.1038/s41550-018-0420-5. S2CID 73667350.
  3. ^ "HEC: Exoplanets Calculator - Planetary Habitability Laboratory @ UPR Arecibo". Archived from the original on 2019-06-02. Retrieved 2018-06-17.