Kepler-25

Kepler-25

A diagram of the Kepler-25 System, compared to our Inner Solar System.
Observation data Epoch J2000      Equinox J2000
Constellation	Lyra[1]
Right ascension	19^h 06^m 33.2204^s
Declination	+39° 29′ 16.321″
Apparent magnitude (V)	10.7[2]
Characteristics
Spectral type	F[3]
Astrometry
Distance	782.7[3] ly (240 pc)
Details
Mass	1.22[2] M☉
Radius	1.36[2] R☉
Luminosity	1.36[2] L☉
Temperature	6190[2] K
Metallicity [Fe/H]	0.01[2] dex
Rotational velocity (v sin i)	11.2[2] km/s
Other designations

Kepler-25 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 19^h 06^m 33.2204^s Declination +39° 29′ 16.321″ 19^h 21^m 39.0^s,.^[4] With an apparent visual magnitude of 10.7,^[2] this star is too faint to be seen with the naked eye.

In 2012, two planets were found transiting the star. These planets were confirmed through transit-timing variation method. A third planet was discovered through follow-up radial velocity measurements which was confirmed in January 2014.

The Kepler-25 planetary system^[3]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	<12.7 MJ	0.068	6.2385	—	—	2.58 R⊕
c	<4.16 MJ	0.11	12.7204	—	—	4.48 R⊕
d	0.283 MJ	—	123	—	—	—

References

1. "Lyra – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
2. Kepler-25b, NASA Ames Research Center, retrieved 2011-12-06
3. Schneider, Jean, "Star: Kepler-25", Extrasolar Planets Encyclopaedia (Paris Observatory), retrieved 2013-12-18
4. "Kepler Discoveries". 2011-12-05.

Coordinates: 19^h 06^m 33.2204^s, +39° 29′ 16.321″