HD 145457
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 16h 10m 03.91431s [1] |
| Declination | +26° 44′ 33.8927″ [1] |
| Spectral type | K0III[1] |
| Other designations | |
HIP 79219 | |
HD 140913 is a star located in the constellation Corona Borealis (The Northern Crown) around 451 light-years away from Earth.[1] With an apparent magnitude of 6.57,[2] it is barely visible to the unaided eye on dark nights clear of light pollution. In reality it is a giant star that has cooled and expanded off the main sequence after exhausting its core hydrogen supply. It is around 1.9 times as massive as the Sun and has swollen to around 10 times its diameter and 45 times its luminosity.[2]
Companion
HD 145457 has a companion called HD 145457 b discovered in 2010. 2.9 times as massive as Jupiter, it orbits about every 176 days with an orbital eccentricity of 0.112 (± 3.1). Its semimajor axis is 0.76 AU. HD 145457 b was discovered by precise Doppler measurements with the Subaru Telescope.[2]
References
- ^ a b c d "HD 145457". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 13 November 2014.
- ^ a b c Sato, Bun'ei; Omiya, Masashi; Liu, Yujuan; Harakawa, Hiroki; Izumiura, Hideyuki; Kambe, Eiji; Toyota, Eri; Murata, Daisuke; Lee, Byeong-Cheol; Masuda, Seiji; Takeda, Yoichi; Yoshida, Michitoshi; Itoh, Yoichi; Ando, Hiroyasu; Kokubo, Eiichiro; Ida, Shigeru; Zhao, Gang; Han, Inwoo; (2010). "Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314". Publications of the Astronomical Society of Japan. 62 (4): 1063–69. arXiv:1005.2860. Bibcode:2010PASJ...62.1063S. doi:10.1093/pasj/62.4.1063.
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