Kepler-737 is an M-type main-sequence red dwarf located 671 light-years away on the border of the constellation Cygnus. It was discovered by HARPS using the transit method and announced on May 10, 2016.[6]

Kepler-737

A transiting planet orbiting a star Kepler-737
Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus[1]
Right ascension	19h 27m 27.085s[2]
Declination	+46° 25′ 45.29″[2]
Characteristics
Evolutionary stage	main-sequence[3]
Spectral type	M0V[3]
Apparent magnitude (G)	15.127694[4]
Apparent magnitude (J)	12.910[4]
Apparent magnitude (H)	12.293[4]
Apparent magnitude (K)	12.097[4]
Apparent magnitude (B)	17.861[5]
Apparent magnitude (V)	15.971[5]
Apparent magnitude (W)	11.969[5]
Astrometry
Proper motion (μ)	RA: 20.094[2] mas/yr Dec.: −19.889[2] mas/yr
Parallax (π)	4.8590 ± 0.0194 mas[2]
Distance	671 ± 3 ly (205.8 ± 0.8 pc)
Details
Mass	0.510+0.0026 −0.0027[1] M☉
Radius	0.480+0.0026 −0.0024[1] R☉
Luminosity	~0.045[5] L☉
Surface gravity (log g)	4.722±0.008[5] cgs
Temperature	3,813+40.127 −38.492[3] K
Metallicity [Fe/H]	−0.24+0.087 −0.081[5] dex
Age	3.89[5] Gyr
Other designations
Gaia DR2 2126820324123177472, KOI-947, KIC 9710326, TIC 63068329, 2MASS J19272708+4625453, WISE J192727.10+462545.1
Database references
SIMBAD	data

Physical properties

General Properties

Kepler-737 is around half the size of the Sun, with a mass of 0.51 solar masses and a radius of 0.48 solar radii.[1] Its spectral class is M0V, its temperature is about 3,813 Kelvin, and it has a brightness of 0.045 solar luminosity.[5] One Kepler Object of Interest (KOI) table claimed the star to be ~14 billion years old.[5]

As for the logarithm of the relative abundance of iron and hydrogen, its metallicity [Fe/H] is −0.24+0.087
−0.081 dex, significantly lower than the Sun's. Its density is roughly 5.239±0.265 g/cm³.[5] Its gravity is weaker than the Sun, with log g of 4.722±0.008 cgs. Its stellar density is about ~5.239±0.265 g/cm³, while the sun is about 1.41 g/cm³.[5]

Astrometry and Characteristics

SIMBAD data indicate that its proper motion is 20.094 mas/yr for right ascension, −19.889 mas/yr for declination, its parallax is 4.859 mas.[4]

Planetary System

Kepler-737b

Kepler-737b[6] was discovered and suspected since May 18, 2016, for orbiting in the habitable zone but not likely to be inhabitable because Kepler-737b is tidally locked.[7] [8][9] Kepler-737b may instead have atmospheric circulation that would distribute the heat around the planet, potentially making a large portion of it habitable, although given its stellar flux the most likely scenario is that the planet's surface is too hot to be habitable. Water on Kepler-737b's surface could also distribute heat.

On the note of the Exoplanet Archive, Kepler-737b was dedicated that orbital period, transit mid-point, transit duration, Rp/Rs, and their errors are taken from DR24 KOI table[5]

References