Kepler-1658b
Kepler-1658b (or the Kepler object of interest, KOI-4.01) is a hot Jupiter, a type of gas giant exoplanet, that orbits an F-type star called Kepler 1658, located about 2629 light-years away from the Solar System. It is the first planet identified by the Kepler space telescope after its launch in 2009, but later ruled out as false alarm since its transit could not be confirmed. A study published in 2019 established it as a planet, describing it as "the closest known planet in terms of orbital period to an evolved star." Analysis of the Transiting Exoplanet Survey Satellite (TESS) data in 2022 showed that it is gradually spiraling into its star.
| Discovery | |
|---|---|
| Discovered by | Ashley Chontos et al. (Kepler team) |
| Discovery date | February 2019 (published 29 April 2019) |
| Transit (Kepler Mission) | |
| Orbital characteristics | |
| 0.0544 ± 0.0007 AU (8,140,000 ± 100,000 km) | |
| Eccentricity | 0.063+0.020 −0.019 |
| 3.84937278±0.00000080 d | |
| Inclination | 76.52°+0.58° −0.59° |
| 352.3°+1.9° −3.4° | |
| Star | Kepler-1658 (KOI-4) |
| Physical characteristics | |
Mean radius | 1.07 RJ |
| Mass | 5.88 MJ |
Mean density | 6,360 kg/m3 (10,720 lb/cu yd) |
| 13.0 g | |
| Albedo | 0.785 |
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