Kepler-45
Kepler-45, formerly known as KOI-254, is a star in the northern constellation of Cygnus. It is located at the celestial coordinates: right ascension 19 31 29.495, declination +41° 03′ 51.37″. With an apparent visual magnitude of 16.88, this star is too faint to be seen with the naked eye.
The star is exhibiting strong starspot activity, with 4.1±2.5% of its surface covered by starspots.
Planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.5505 MJ | 0.030 | 2.455239 | — | — | 11 R🜨 |
The "Hot Jupiter" class planet Kepler-45b, discovered in February 2011, is unusually massive for the M-class parent star. Its orbit is aligned within 11 degrees of rotational axis of the star.
The planet is strongly suspected to have optically thick rings, because its planetary shadow appears to be elongated.
See also
References
- ^ "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ "Kepler-45". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 January 2018.
- ^ Muirhead, Philip S.; Hamren, Katherine; Schlawin, Everett; Rojas-Ayala, Bárbara; Covey, Kevin R.; et al. (May 2012). "Characterizing the Cool Kepler Objects of Interests. New Effective Temperatures, Metallicities, Masses, and Radii of Low-mass Kepler Planet-candidate Host Stars". The Astrophysical Journal Letters. 750 (2). L37. arXiv:1109.1819. Bibcode:2012ApJ...750L..37M. doi:10.1088/2041-8205/750/2/L37. S2CID 27131741.
- ^ Kepler-45b, NASA Ames Research Center, archived from the original on 2015-09-19, retrieved 2011-12-06
- ^ "Kepler Discoveries". 2011-12-05. Archived from the original on 2010-05-27.
- ^ Activity and differential rotation of the early M dwarf Kepler-45 from transit mapping
- ^ Schneider, Jean, "Star: Kepler-45", Extrasolar Planets Encyclopaedia, archived from the original on 2014-03-04, retrieved 2011-12-06
- ^ Kepler-45 b at exoplanet.eu
- ^ Ford, Eric B.; Rowe, Jason F.; Fabrycky, Daniel C.; Carter, Joshua A.; Holman, Matthew J.; Lissauer, Jack J.; Ragozzine, Darin; Steffen, Jason H.; Batalha, Natalie M.; Borucki, William J.; Bryson, Steve; Caldwell, Douglas A.; Dunham, Edward W.; Gautier, Thomas N.; Jenkins, Jon M.; Koch, David G.; Li, Jie; Lucas, Philip; Marcy, Geoffrey W.; McCauliff, Sean; Mullally, Fergal R.; Quintana, Elisa; Still, Martin; Tenenbaum, Peter; Thompson, Susan E.; Twicken, Joseph D. (2011), "Transit Timing Observations from Kepler : I. Statistical Analysis of the First Four Months", The Astrophysical Journal Supplement Series, 197 (1): 2, arXiv:1102.0544, Bibcode:2011ApJS..197....2F, doi:10.1088/0067-0049/197/1/2, S2CID 118472942
- ^ Gaidos, E.; Mann, A. W.; Kraus, A. L.; Ireland, M. (2016). "They are small worlds after all: Revised properties of Kepler M dwarf stars and their planets". Monthly Notices of the Royal Astronomical Society. 457 (3): 2877–2899. arXiv:1512.04437. Bibcode:2016MNRAS.457.2877G. doi:10.1093/mnras/stw097. S2CID 53705225.
- ^ Dai, Fei; Winn, Joshua N.; Berta-Thompson, Zachory; Sanchis-Ojeda, Roberto; Albrecht, Simon (2018). "Stellar Obliquity and Magnetic Activity of Planet-hosting Stars and Eclipsing Binaries Based on Transit Chord Correlation". The Astronomical Journal. 155 (4): 177. arXiv:1803.05000. Bibcode:2018AJ....155..177D. doi:10.3847/1538-3881/aab618. S2CID 59454470.
- ^ Revealing peculiar exoplanetary shadows from transit light curves