KELT-2Ab
Coordinates: 
06h 10m 39s, +30° 57′ 25″
06h 10m 39s, +30° 57′ 25″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 | |
| Temperature | 1994±104 K or 1782±111 K[2] |
KELT-2Ab is an
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.[3]
The water vapour was detected in planetary atmosphere in 2018.[4]
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
- ^ S2CID 14271501.
- S2CID 119209434
- ^ The MgI line: a new probe of the atmospheres of evaporating exoplanets
- S2CID 119033501
External links
- KELT-North survey website Archived 2019-01-24 at the Wayback Machine
- "Planet KELT-2A b". Extrasolar Planets Encyclopaedia. Archived from the original on 2012-10-19. Retrieved 2012-07-30.
- KELT-2Ab discovery lightcurve, with music
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