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Exoplanet List of exoplanets
Parent star
Star Kepler-25
Constellation Cygnus
Right ascension (α) 19h 06m 33.2143s[1]
Declination (δ) +39° 29′ 16.358″[1]
Apparent magnitude (mV) 10.7
Distance 799±5[1] ly
(245±1[1] pc)
Spectral type M1V[2]
Mass (m) 1.159+0.040
[3] M
Radius (r) 1.297±0.015[3] R
Temperature (T) 6270±79[4] K
Metallicity [Fe/H] −0.05±0.10[4]
Physical characteristics
Radius (r) 2.65 (± 0.04)[2] R
Orbital elements
Semi-major axis (a) 0.068[2] AU
Eccentricity (e) 0.05+0.05
Orbital period (P) 6.23853555[2] d
Discovery information
Discovery date 25 January 2017
Discoverer(s) Jason H. Steffen et al.
Discovery method Transit
Discovery site Kepler Space Observatory
Discovery status Published
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

Kepler-25b is an extrasolar planet orbiting the star Kepler-25, located in the constellation Cygnus.[5] It was discovered by the Kepler Space Telescope in 2012. Kepler-25b is one of the most massive planets ever found. if it had the equivalent of 1 extra Saturn mass, it would be considered a brown dwarf, as it has ≈12,7 Jupiter Masses. ≥13 Jupiter Masses is required for deuterium fusion.


  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia Data Release 2 Vizier catalog entry
  2. ^ a b c d e "Kepler-25 b". NASA Exoplanet Archive. Retrieved 29 December 2016.
  3. ^ a b Silva Aguirre, V.; et al. (2015). "Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology". Monthly Notices of the Royal Astronomical Society. 452 (2): 2127–2148. arXiv:1504.07992. Bibcode:2015MNRAS.452.2127S. doi:10.1093/mnras/stv1388.
  4. ^ a b Huber, Daniel; et al. (2013). "Fundamental Properties of Kepler Planet-candidate Host Stars using Asteroseismology". The Astrophysical Journal. 767 (2). 127. arXiv:1302.2624. Bibcode:2013ApJ...767..127H. doi:10.1088/0004-637X/767/2/127.
  5. ^ Kepler-25b, NASA
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