Kepler-51
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cygnus |
Right ascension | 19h 45m 55.14297s[1] |
Declination | +49° 56′ 15.6506″[1] |
Characteristics | |
Spectral type | G[2]or G4.5V[citation needed] |
Astrometry | |
Radial velocity (Rv) | −4.3[3] km/s |
Proper motion (μ) | RA: +0.006[1] mas/yr Dec.: −7.458[1] mas/yr |
Parallax (π) | 1.2473 ± 0.0217[1] mas |
Distance | 2,610 ± 50 ly (800 ± 10 pc) |
Details[4] | |
Mass | 0.99±0.03 M☉ |
Radius | 0.92+0.05 −0.03 R☉ |
Luminosity | 0.66[1] L☉ |
Surface gravity (log g) | 4.51+0.03 −0.04 cgs |
Temperature | 5,662+64 −65 K |
Metallicity [Fe/H] | +0.04±0.04 dex |
Rotational velocity (v sin i) | 5.5±1.0[3] km/s |
Age | 2.14+4.62 −1.16 Gyr |
Other designations | |
KOI-620[5] | |
Database references | |
SIMBAD | data |
Kepler-51 is a Sun-like star that is only about 500 million years old.[2] It is orbited by three super-puff planets Kepler-51b, Kepler-51c and Kepler-51d which have the lowest known densities of any exoplanet. The planets are all Jupiter-sized but with masses only a few times Earth's.[2]
Planets[]
![]() | This section does not cite any sources. (May 2021) |
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.007 MJ | 0.2514 | 45.154 | — | — | 0.633 RJ |
c | 0.013 MJ | 0.384 | 85.312 | — | — | 0.803 RJ |
d | 0.024 MJ | 0.509 | 130.194 | — | — | 0.865 RJ |
Kepler-51 has three planets, all super-puffs. Kepler-51b, c and d have some of the lowest known densities of any exoplanet.
References[]
- ^ Jump up to: a b c d e f 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 DR2 record for this source at VizieR.
- ^ Jump up to: a b c Libby-Roberts, Jessica E.; et al. (2020). "The Featureless Transmission Spectra of Two Super-puff Planets". The Astronomical Journal. 159 (2): 57. arXiv:1910.12988. Bibcode:2020AJ....159...57L. doi:10.3847/1538-3881/ab5d36.
- ^ Jump up to: a b Petigura, Erik A.; et al. (September 2017). "The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets". The Astronomical Journal. 154 (3): 20. arXiv:1703.10400. Bibcode:2017AJ....154..107P. doi:10.3847/1538-3881/aa80de. 107.
- ^ Johnson, John Asher; et al. (September 2017). "The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars". The Astronomical Journal. 154 (3): 9. arXiv:1703.10402. Bibcode:2017AJ....154..108J. doi:10.3847/1538-3881/aa80e7. 108.
- ^ "KOI-620". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-08.
Further reading[]
- Kepler-51 is Home to Three Super-Puff Exoplanets, Sci-News, Dec 20, 2019 by Natali Anderson
Categories:
- G-type main-sequence stars
- Solar analogs
- Planetary systems with three confirmed planets
- Cygnus (constellation)
- Main-sequence-star stubs