HAT-P-11b
HAT-P-11b (or Kepler-3b) is an extrasolar planet orbiting the star HAT-P-11. It was discovered by the HATNet Project team in 2009 using the transit method, and submitted for publication on 2 January 2009.
Size comparison of Neptune with HAT-P-11b (gray). | |
| Discovery | |
|---|---|
| Discovered by | Bakos et al. |
| Discovery site | Cambridge, Massachusetts |
| Discovery date | 2 January 2009 |
Detection method | Transit (HATNet) |
| Orbital characteristics | |
| Apastron | 0.0637+0.0020 −0.0019 AU |
| Periastron | 0.0413+0.0018 −0.0019 AU |
Semi-major axis | 0.05254+0.00064 −0.00066 AU |
| Eccentricity | 0.218+0.034 −0.031 |
Orbital period (sidereal) | 4.887802443+0.000000034 −0.000000030 d |
| Inclination | 89.05+0.15 −0.09 |
| 2454957.15+0.17 −0.20 | |
| 19+14 −16 | |
| Semi-amplitude | 10.42+0.64 −0.66 |
| Star | HAT-P-11 |
| Physical characteristics | |
Mean radius | 4.36±0.06 R🜨 |
| Mass | 23.4±1.5 ME |
Mean density | 1,440 kg/m3 (2,430 lb/cu yd) |
Surface gravity | 1.20 g |
This planet is located approximately 123 light-years (38 pc) distant from Earth.
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