Kepler-37c

Kepler-37c
Discovery
Discovery site	Kepler space telescope
Discovery date	2013
Detection method	Transit
Orbital characteristics
Semi-major axis	0.1390±0.0020 AU
Eccentricity	<0.099
Orbital period (sidereal)	21.301848(18) d
Inclination	89.07°+0.19°; −0.33°
Star	Kepler-37
Physical characteristics
Mean radius	0.755+0.033; −0.055 R🜨
Mass	<1.3 M🜨
Temperature	615±9 K (342 °C; 647 °F, equilibrium)

Kepler-37c is an exoplanet discovered by the Kepler space telescope in February 2013.^[3] With an orbital period of 21 days,^[4] it is located 209 light-years away, in the constellation Lyra.

Host star

The planet orbits a (G-type) star similar to the Sun, named Kepler-37, orbited by a total of four planets. The star has a mass of 0.80 M_☉ and a radius of 0.79 R_☉. It has a temperature of, 5417 K and is 5.66 billion years old. In comparison, the Sun is 4.6 billion years old,^[5] and has a temperature of 5778 K.^[6]

The star's apparent magnitude, or how bright it appears from Earth's perspective, is 9.71. Therefore, it is too dim to be seen with the naked eye.

References

^ Barclay, T.; Rowe, J. F.; Lissauer, J. J.; Huber, D.; Fressin, F.; Howell, S. B.; Bryson, S. T.; Chaplin, W. J.; Désert, J. M. (2013-02-20). "A sub-Mercury-sized exoplanet". Nature. 494 (7438): 452–4. arXiv:1305.5587. Bibcode:2013Natur.494..452B. doi:10.1038/nature11914. ISSN 0028-0836. PMID 23426260. S2CID 205232792.
^ ^a ^b Bonomo, A. S.; Dumusque, X.; et al. (April 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems". Astronomy & Astrophysics. arXiv:2304.05773. doi:10.1051/0004-6361/202346211. S2CID 258078829.
^ Harwood, William. "Kepler telescope spots smallest exoplanet yet". Spaceflight Now Inc. Retrieved 25 February 2013.
^ Black, Charles. "NASA's Kepler discovers small planet system". SEN TV LIMITED. Archived from the original on 23 February 2013. Retrieved 25 February 2013.
^ Fraser Cain (16 September 2008). "How Old is the Sun?". Universe Today. Retrieved 19 February 2011.
^ Fraser Cain (15 September 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.