HAT-P-12b
| Exoplanet | List of exoplanets | |
|---|---|---|
| 300px |
||
| Parent star | ||
| Star | HAT-P-12 | |
| Constellation | Canes Venatici | |
| Right ascension | (α) | 13h 57m 434s |
| Declination | (δ) | +43° 29′ 37″ |
| Apparent magnitude | (mV) | 12.84 |
| Distance | 464.77 ± 190 ly (142.5 ± 13.7 pc) |
|
| Spectral type | K4 | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.0384 ± 0.0003[1] AU |
| Eccentricity | (e) | 0 (assumed)[1] |
| Orbital period | (P) | 3.2130598 ± 0.0000021[1] d |
| Inclination | (i) | 89.0 ± 0.4[1]° |
| Time of transit | (Tt) | 2,454,419.19556 ± 0.00020[1] JD |
| Physical characteristics | ||
| Mass | (m) | 0.211 ± 0.012[1] MJ |
| Radius | (r) | 0.959 ± 0.029[1] RJ |
| Density | (ρ) | 295 ± 25[1] kg m−3 |
| Discovery information | ||
| Discovery date | April 29, 2009 | |
| Discoverer(s) | Hartman et al. | |
| Discovery method | Transit | |
| Other detection methods | Radial velocity | |
| Discovery site | Cambridge, Massachusetts | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HAT-P-12b is an extrasolar planet approximately 465 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.[2] 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]
References
External links
Media related to Lua error in package.lua at line 80: module 'strict' not found. at Wikimedia Commons
Coordinates: 
13h 57m 434s, +43° 29′ 37″
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