Astronomy:Kepler-44

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Short description: Star in the constellation Cygnus
Kepler-44
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cygnus[1]
Right ascension  20h 00m 24.5657s[2]
Declination +45° 45′ 43.763″[2]
Apparent magnitude (V) 15[3]
Characteristics
Spectral type G0V~G0IV[4]
Astrometry
Proper motion (μ) RA: −0.943±0.038[2] mas/yr
Dec.: 8.225±0.038[2] mas/yr
Parallax (π)0.8136 ± 0.0229[2] mas
Distance4,000 ± 100 ly
(1,230 ± 30 pc)
Details
Mass1.19±0.10[3] M
Radius1.52±0.09[3] R
Temperature5757±134[3] K
Metallicity [Fe/H]0.26±0.10[3] dex
Rotational velocity (v sin i)5.5±1.5[3] km/s
Age6.95[3] Gyr
Other designations
KOI-204, KIC 9305831, 2MASS J20002456+4545437
Database references
SIMBADdata
KICdata

Kepler-44, formerly known as KOI-204, is a star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension  20h 00m 24.564s, Declination +45° 45′ 43.71″.[5] With an apparent visual magnitude of 16,[3] this star is too faint to be seen with the naked eye.

Planetary system

The Kepler spacecraft detected a transiting planet candidate around this star that was confirmed by radial velocity measurements taken by the SOPHIE spectrograph mounted on the 1.93 m telescope at the Haute-Provence Observatory.[6] The planet is likely to be tidally locked to the parent star. In 2015, the planetary nightside temperature was estimated to be equal to 2347+149−280 K.[7]

The Kepler-44 planetary system[4]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.02 MJ 0.0455 3.246774 13 R

References

Coordinates: Sky map 20h 00m 24.564s, +45° 45′ 43.71″