Kepler-45 Explained

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, declination .^[1] 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% of its surface covered by starspots.^[2]

Planetary system

The "Hot Jupiter" class planet Kepler-45b,^[3] discovered in February 2011, is unusually massive for the M-class parent star.^[4] Its orbit is aligned within 11 degrees of rotational axis of the star.^[5]

The planet is strongly suspected to have optically thick rings, because its planetary shadow appears to be elongated.^[6]

See also

• NGTS-1b

Notes and References

1. Web site: Kepler Discoveries . 2011-12-05 . https://web.archive.org/web/20100527104316/http://kepler.nasa.gov/Mission/discoveries/ . dead . 2010-05-27 .
2. https://academic.oup.com/mnras/article/492/4/5141/5706859 Activity and differential rotation of the early M dwarf Kepler-45 from transit mapping
3. https://exoplanet.eu/catalog/kepler_45_b--1028/ Kepler-45 b at exoplanet.eu
4. 1512.04437. 10.1093/mnras/stw097. They are small worlds after all: Revised properties of Kepler M dwarf stars and their planets. 2016. Gaidos. E.. Mann. A. W.. Kraus. A. L.. Ireland. M.. Monthly Notices of the Royal Astronomical Society. 457. 3. 2877–2899. free . 2016MNRAS.457.2877G. 53705225.
5. 1803.05000. 10.3847/1538-3881/aab618. Stellar Obliquity and Magnetic Activity of Planet-hosting Stars and Eclipsing Binaries Based on Transit Chord Correlation. 2018. Dai. Fei. Winn. Joshua N.. Berta-Thompson. Zachory. Sanchis-Ojeda. Roberto. Albrecht. Simon. The Astronomical Journal. 155. 4. 177. 2018AJ....155..177D. 59454470 . free .
6. https://www.aanda.org/articles/aa/abs/2021/02/aa39050-20/aa39050-20.html Revealing peculiar exoplanetary shadows from transit light curves