2MASS J19383260+4603591
2MASS J19383260+4603591 (commonly abbreviated to 2M J1938+4603, also known as Kepler-451) is a binary star system with at least one known planet, Kepler-451b. The system comprises two stars, a pulsating subdwarf B star as well as a small red dwarf star.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 38m 32.61s |
| Declination | 46h 03m 59.1s |
| Characteristics | |
| Spectral type | sdBV/M |
| Astrometry | |
| Proper motion (μ) | RA: 5.23±0.04 mas/yr Dec.: -4.40±0.04 mas/yr |
| Parallax (π) | 2.4400 ± 0.0316 mas |
| Distance | 1,340 ± 20 ly (410 ± 5 pc) |
| Orbit | |
| Period (P) | 0.12576528 d |
| Details | |
| Kepler-451 A | |
| Mass | 0.48±0.03 M☉ |
| Radius | 0.223±0.004/0.158±0.003 R☉ |
| Temperature | 29564±106 K |
| Age | 6±2 Gyr |
| Kepler-451 B | |
| Mass | 0.120±0.010 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
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