| Discovery[1] | |
|---|---|
| Discovered by | L. D. Nielsen et al. |
| Discovery date | July 2020 (announced) |
| Transit method | |
| Designations | |
| CD−55° 9423b, TIC 201248411 b, TOI-129 b, TYC 8464-1200-1 b, 2MASS J00004490-5449498 b[2] | |
| Orbital characteristics[1] | |
| 0.01782+0.00020 −0.00021 AU | |
| Eccentricity | 0,[1] 0.009[3] |
| 0.9809734±0.0000031 d | |
| Inclination | 77.18°+0.92° −1.00° |
| Semi-amplitude | 753.7±5.0 m/s |
| Star | HIP 65A |
| Physical characteristics[1] | |
| <1.5 RJ | |
| Mass | 3.213±0.078 MJ,[1] ≥2.95 MJ[3] |
Mean density | 0.480+0.610 −0.260 g/cm3 |
| Temperature | 1411±15 K (1,138 °C; 2,080 °F, equilibrium) |
HIP 65Ab (TOI-129 b) is a hot Jupiter discovered in 2020 orbiting the K-type main-sequence star HIP 65A, located approximately 202 light-years (62 parsecs) distant in the southern constellation of Phoenix. It completes one orbit around its host star every 23.5 hours (0.98 days), making it an ultra-short period planet. Its radius is likely smaller than 1.5 RJ—another estimate of 2.03+0.61
−0.49 RJ is likely an overestimate.[1]
Due to the planet's vicinity to the star, tidal interactions are slowly causing its orbit to decay. As such, the planet is expected to spiral into HIP 65A and be destroyed by its Roche limit within somewhere between 80 million years and a few billion years.[1]
- ^ a b c d e f g Cite error: The named reference
Nielsen2020was invoked but never defined (see the help page). - ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Paredes2021was invoked but never defined (see the help page).