Kepler-51
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]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 19h 45m 55.14297s[1] |
| Declination | +49° 56′ 15.6506″[1] |
| Characteristics | |
| Spectral type | G[2] |
| 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☉ |
| 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 | |
| Database references | |
| SIMBAD | data |
References
- 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.
- Libby-Roberts, Jessica E.; et al. (October 28, 2019). "The Featureless Transmission Spectra of Two Super-Puff Planets". arXiv:1910.12988. Cite journal requires
|journal=(help) - 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
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