Kepler-37

Coordinates: 18^h 56^m 14.32^s, +44° 31′ 05.3″

Kepler-37

Line up comparing the Kepler-37 planets system to the moon and planets in the Solar System.
Observation data Epoch J2000      Equinox J2000
Constellation	Lyra
Right ascension	18h 56m 14.3078s[1]
Declination	44° 31′ 05.389″[1]
Apparent magnitude (V)	9.710[2]
Characteristics
Spectral type	G8V
Astrometry
Proper motion (μ)	RA: −60.520±0.053[1] mas/yr Dec.: 48.694±0.050[1] mas/yr
Parallax (π)	15.6155 ± 0.0290[1] mas
Distance	208.9 ± 0.4 ly (64.0 ± 0.1 pc)
Details
Mass	0.803 (± 0.07)[3] M☉
Radius	0.77 (± 0.026)[3] R☉
Temperature	5417 (± 75)[3] K
Metallicity [Fe/H]	–0.32 (± 0.07)[3] dex
Rotational velocity (v sin i)	1.1 (± 1.1)[3] km/s
Age	5.66 Gyr
Other designations
KOI-245, KIC 8478994,[2] TYC 3131-1199-1, BD+44 3020, 2MASS J18561431+4431052, GSC 03131-01199, Gaia DR2 2106674071344722688[4]
Database references
SIMBAD	data
Extrasolar Planets Encyclopaedia	data
KIC	data

Kepler-37, also known as UGA-1785,^[5][6][7] is a G-type main-sequence star located in the constellation Lyra 209 light years from Earth. It is host to exoplanets Kepler-37b, Kepler-37c, Kepler-37d and Kepler-37e, all of which orbit very close to it. Kepler-37 has a mass about 80.3 percent of the Sun's and a radius about 77 percent as large.^[8] It has a temperature similar to that of the Sun, but a bit cooler at 5,417 K. It has about half the metallicity of our Sun. With an age of roughly 6 billion years,^[9] it is slightly older than the Sun, but is still a main-sequence star. Until January 2015, Kepler-37 was the smallest star to be measured via asteroseismology.^[10]

Planetary system[]