2015 in space
2015 in space | ||||||
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Space probe launches  |
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| Impact events | ||||||
| Selected NEOs | ||||||
| Exoplanets |
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| Discoveries |
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| Comets | ||||||
| Space exploration | ||||||
| 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 | |
Mean radius | 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).
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]
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]
