KELT-2Ab
KELT-2Ab is an extrasolar planet that orbits the star KELT-2A approximately 440 light-years away in the constellation of Auriga.[1] It was discovered by the KELT-North survey via the transit method, so both its mass and radius are known quite precisely. As of its discovery KELT-2Ab is the fifth-brightest transiting Hot Jupiter known that has a well constrained mass. This makes the KELT-2A system a promising target for future space- and ground-based follow-up observations to learn about the planet's atmosphere.
Discovery | |
---|---|
Discovered by | KELT-North |
Discovery date | 7 June 2012 |
Transit | |
Orbital characteristics | |
0.5504 ± 0.00086 AU (82,339,000 ± 129,000 km) | |
Eccentricity | 0 |
4.1137913 ± 0.00001 d | |
Inclination | 88.56 ± 1.14 |
2455974.60338 ± 0.00083 | |
90 | |
Semi-amplitude | 161.1 ± 7.8 |
Star | KELT-2A |
Physical characteristics | |
Mean radius | 1.290 ± 0.057[1] RJ |
Mass | 1.524 ± 0.088[1] MJ |
Mean density | 940 ± 90 kg/m3 (1,580 ± 150 lb/cu yd)[1] |
22.7 m/s2 (74 ft/s2) 2.3 g | |
The star KELT-2A is a member of the common-proper-motion binary star system KELT-2 (HD 42176). KELT-2B is an early K dwarf approximately 295 astronomical units away.
See also
References
- Beatty, Thomas G.; et al. (2012). "KELT-2Ab: A Hot Jupiter Transiting the Bright (V = 8.77) Primary Star of a Binary System". The Astrophysical Journal Letters. 756 (2). L39. arXiv:1206.1592. Bibcode:2012ApJ...756L..39B. doi:10.1088/2041-8205/756/2/L39. hdl:1969.1/178896.
External links
- KELT-North survey website
- "Planet KELT-2A b". The Extrasolar Planets Encyclopaedia. Archived from the original on 2012-10-19. Retrieved 2012-07-30.
- KELT-2Ab discovery lightcurve, with music
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.