 Artist’s Impression of hot Jupiters (Puli is bottom left) | |
| Discovery [1] | |
|---|---|
| Discovered by | Hartman et al. |
| Discovery site | Cambridge, Massachusetts |
| Discovery date | April 29, 2009 |
| Transit | |
| Designations | |
| Puli [2] | |
| Orbital characteristics | |
| 0.0384 ± 0.0003 AU (5,745,000 ± 45,000 km) [1] | |
| Eccentricity | 0 (assumed) [1] |
| 3.2130598 ± 0.0000021 [1] d | |
| Inclination | 89.0 ± 0.4 [1] |
| Star | HAT-P-12 |
| Physical characteristics | |
| 0.959 ± 0.029 [1] RJ | |
| Mass | 0.211 ± 0.012 [1] MJ |
Mean density | 0.295 ± 0.025 g/cm3 [1] |
HAT-P-12b, formally named Puli, [2] is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12, which is located in Canes Venatici constellation. It is a transiting hot Jupiter that was discovered by the HATNet Project on April 29, 2009.
HAT-P-12b is a H/He-dominated gas giant planet with a core mass of 11.3+2.6
−2.1 M🜨 and is moderately irradiated by its low-metallicity host star. [3] Therefore, HAT-P-12b is most likely an H/He-dominated planet with a core of perhaps ~10 M🜨, and a total metal fraction of ~15%. This makes HAT-P-12b the least massive H/He-dominated gas giant planet found to date; the previous record holder was Saturn. [1]
In 2020, the obtained transmission spectra have revealed that the atmosphere of HAT-P-12b is cloudy, [4] with haze above cloud tops. Water was detected. [5] The prevalence of clouds and hazes in planetary atmosphere was disputed in 2021 though. [6]
In August 2022, this planet and its host star were included among 20 systems to be named by the third NameExoWorlds project. [7] The approved names, proposed by a team from Hungary, were announced in June 2023. HAT-P-12b is named Puli and its host star is named Komondor, after the Hungarian Puli and Komondor dog breeds. [2]
From top left to lower right: WASP-12b, WASP-6b, WASP-31b, WASP-39b, HD 189733b, HAT-P-12b, WASP-17b, WASP-19b, HAT-P-1b and HD 209458b.
