Kepler-38

Kepler-38
Observation data
Epoch J2000      Equinox J2000
Constellation Lyra
Right ascension 19h 07m 19.2813s[1]
Declination +42° 16′ 45.121″[1]
Characteristics
Spectral type G V[2] / M[3]
Astrometry
Proper motion (μ) RA: −4.575(14) mas/yr[1]
Dec.: −13.219(14) mas/yr[1]
Parallax (π)0.8546 ± 0.0119 mas[1]
Distance3,820 ± 50 ly
(1,170 ± 20 pc)
Orbit
PrimaryKepler-38A
CompanionKepler-38B
Period (P)18.79537
Semi-major axis (a)0.1469
Eccentricity (e)0.1032
Details
Kepler-38A
Mass0.949 M☉
Radius1.757 R☉
Temperature5640 K
Metallicity-0.11
Kepler-38B
Mass0.249 M☉
Radius0.2724 R☉
Metallicity-0.11
Other designations
KOI-1740, KIC 6762829, 2MASS J19071928+4216451[4]
Database references
SIMBADdata
KICdata

Kepler-38 is a binary star system in the constellation Lyra. These stars, called Kepler-38A and Kepler-38B have masses of 95% and 25% solar masses respectively. The brighter star is spectral class G while the secondary has spectral class M. They are separated by 0.147 AU, and complete an eccentric orbit around a common center of mass every 18.8 days.[2]

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b Orosz, Jerome A.; et al. (2012), "THE NEPTUNE-SIZED CIRCUMBINARY PLANET KEPLER-38b", The Astrophysical Journal, 758 (2): 87, arXiv:1208.3712, Bibcode:2012ApJ...758...87O, doi:10.1088/0004-637X/758/2/87, S2CID 119226095
  3. ^ "Notes for star Kepler-38(AB)". Extrasolar Planets Encyclopaedia. 2012. Retrieved 29 April 2013.[dead link‍]
  4. ^ "Kepler-38". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 January 2017.