KELT-4Ab
| Discovery | |
|---|---|
| Discovered by | KELT-North |
| Discovery date | 2015[1] |
| Transit | |
| Orbital characteristics | |
| 0.04321 ± 0.00085 AU (6,464,000 ± 127,000 km)[2] | |
| Eccentricity | 0.03 ± 0.021[2] |
| 2.9895933 (± 4.9e-06)[2] d | |
| Inclination | 83.11 ± 0.057[2] |
| Star | KELT-4A |
| Physical characteristics | |
| 1.706 ± 0.085[2] RJ | |
| Mass | 0.878 ± 0.07[2] MJ |
KELT-4Ab is an extrasolar planet that orbits the star KELT-4A, in the star system KELT-4. The planet is approximately 760 ly (230 pc) away[3] in the constellation of Leo.[4] The planet was discovered by the Kilodegree Extremely Little Telescope (KELT).
Characteristics
[edit]The exoplanet was discovered by transit and is a Hot Jupiter planet orbiting a star in a triple star system, KELT-4. It is the fourth planet found in such a system.[5] As KELT-4A is the brightest host (V~10) of a Hot Jupiter in a hierarchical triple stellar system found so far researchers expect it may be useful in learning more about inflated planets.[1][6]
Star system
[edit]KELT-4 is a triple star system. KELT-4BC is a binary star system subcomponent of the triple, 328 ± 16 AU (4.91×1010 ± 2.4×109 km; 3.05×1010 ± 1.5×109 mi) away from KELT-4A and the projected separation between KELT-4B and KELT-4C is 10.30 ± 0.74 AU (1.541×109 ± 111,000,000 km; 957,000,000 ± 69,000,000 mi).[1]
See also
[edit]- Gliese 667 Cc, a planet in a triple star system
- KELT-2Ab, a previous planet discovered by the KELT survey, in a binary system
- KELT
References
[edit]- ^ a b c Eastman, Jason D.; et al. (2016). "KELT-4Ab: An Inflated Hot Jupiter Transiting The Bright (V ~ 10) Component Of A Hiearchical Triple". The Astrophysical Journal. 151 (2): 45. arXiv:1510.00015. Bibcode:2016AJ....151...45E. doi:10.3847/0004-6256/151/2/45. S2CID 17613522.
- ^ a b c d e f "Planet KELT-4A b". Extrasolar Planets Encyclopaedia. Archived from the original on 2016-04-16. Retrieved 2016-04-02.
- ^ Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
- ^ "Planet KELT-4A b". Open Exoplanet Catalogue. Retrieved 2016-04-02.
- ^ Bob Yirka (1 April 2016). "Planet with triple-star system found". Phys.org. Retrieved 3 April 2016.
- ^ Nola Taylor Redd (31 March 2016). "New Alien Planet Boasts Rare Triple Suns". Scientific American. Retrieved 2 April 2016.
External links
[edit]- KELT-North survey website Archived 2019-01-24 at the Wayback Machine
- Open Exoplanet Catalogue Entry
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