2MASS J19383260+4603591

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2MASS J19383260+4603591 A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension  19h 38m 32.61s[1]
Declination  46h 03m 59.1s[1]
Spectral type sdBV/M
Mass0.48±0.03/0.120±0.010[1] [2] M
Radius0.223±0.004/0.158±0.003[1] [2] R
Temperature29564±106/null (A/B)[1][2] K
Age6±2 Gyr
Other designations
Kepler-451, KIC 9472174, 2MASS J19383260+4603591[3]
Database references

2MASS J19383260+4603591 (Also known as Kepler-451) is a binary star system with at least one known planet, Kepler-451b. The system comprises two stars, a subdwarf B-type star as well as a small red dwarf star.

Planetary system[edit]

It has at least one confirmed exoplanet, 2MASS J19383260+4603591 b, discovered in 2015 by the Kepler spacecraft.

The 2MASS J19383260+4603591 planetary system[1]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b 604±32 M 0.92±0.02 416±2


  1. ^ a b c d e f "2MASS J19383260+4603591 b/Kepler-451 b CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2015-10-09.
  2. ^ a b c "2MASS J19383260+4603591 system". Open Exoplanet Catalog. Retrieved 2015-10-09.
  3. ^ "Kepler-451". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-09.