Kepler-63

Kepler-63
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 16m 54.2861s[1]
Declination 49° 32′ 53.451″[1]
Apparent magnitude (V) 12.02
Characteristics
Evolutionary stage Main sequence
Spectral type G5
Astrometry
Radial velocity (Rv)−21.7±0.8[2] km/s
Proper motion (μ) RA: 14.375[2] mas/yr
Dec.: 23.336[2] mas/yr
Parallax (π)5.1157 ± 0.0096 mas[2]
Distance638 ± 1 ly
(195.5 ± 0.4 pc)
Details[3]
Mass0.984+0.035
−0.040 M☉
Radius0.901+0.027
−0.021 R☉
Luminosity0.696+0.076
−0.059[4] L☉
Surface gravity (log g)4.52±0.02 cgs
Temperature5576±50 K
Metallicity [Fe/H]0.05±0.08[4] dex
Rotation5.4±0.009 days
Rotational velocity (v sin i)5.6±0.8[4] km/s
Age0.21±0.045 Gyr
Other designations
KOI-63, TYC 3550-458-1, 2MASS J19165428+4932535, Gaia EDR3 2132628489996257920[1]
Database references
SIMBADdata

Kepler-63 is a G-type main-sequence star about 638 light-years away. The star is much younger than the Sun, at 0.21 billion years. Kepler-63 is similar to the Sun in its concentration of heavy elements.

The star is exhibiting strong starspot activity, with relatively cold (4700±300 K) starspots concentrated in two mid-latitude bands similar to the Sun,[3] changing their position in a cycle with a period of 1.27±0.16 years.[5] Due to high magnetic activity associated with its young age, Kepler-63 has a very hot corona heated to 8 million degrees, and produces over ten times the solar amount of x-rays than the Sun.[6]

Multiplicity surveys did not detect any stellar companions to Kepler-63 by 2016.[7]

  1. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ a b Netto, Y.; Valio, A. (2020), "Stellar magnetic activity and the butterfly diagram of Kepler-63", Astronomy & Astrophysics, 635: A78, arXiv:1911.08661, Bibcode:2020A&A...635A..78N, doi:10.1051/0004-6361/201936219, S2CID 208176115
  4. ^ a b c Cite error: The named reference Sanchis2013 was invoked but never defined (see the help page).
  5. ^ Estrela, Raissa; Valio, Adriana (2016), Stellar magnetic cycles in the solar-like stars Kepler-17 and Kepler-63, arXiv:1608.07322
  6. ^ Cite error: The named reference Sairam2018 was invoked but never defined (see the help page).
  7. ^ Furlan, E.; Ciardi, D. R.; Everett, M. E.; Saylors, M.; Teske, J. K.; Horch, E. P.; Howell, S. B.; Van Belle, G. T.; Hirsch, L. A.; Gautier, T. N.; Adams, E. R.; Barrado, D.; Cartier, K. M. S.; Dressing, C. D.; Dupree, A. K.; Gilliland, R. L.; Lillo-Box, J.; Lucas, P. W.; Wang, J. (2016), "Thekeplerfollow-Up Observation Program. I. A Catalog of Companions Tokeplerstars from High-Resolution Imaging", The Astronomical Journal, 153 (2): 71, arXiv:1612.02392, doi:10.3847/1538-3881/153/2/71, S2CID 38339900