| Observation data Epoch 2000 Equinox 2000 |
|
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 50m 50.2469s[1] |
| Declination | +48° 04′ 51.085″[1] |
| Apparent magnitude (V) | 9.473[1]9.59 [2] |
| Characteristics | |
| Spectral type | K5[1]K4 [2] |
| Apparent magnitude (B) | 10.66 ±0.05[1] |
| Apparent magnitude (J) | 7.608 ±0.029[1] |
| Apparent magnitude (H) | 7.131 ±0.021[1] |
| Apparent magnitude (K) | 7.009 ±0.020[1] |
| Astrometry | |
| Proper motion (μ) | RA: 126.44 [1] mas/yr Dec.: 230.98[1] mas/yr |
| Distance | 123 ±4.2 ly (38 ±1.3 pc) |
| Details | |
| Mass | 0.81 +0.03 -0.02 M☉ |
| Radius | 0.75 ± .02 R☉ |
| Luminosity | 0.26 L☉ |
| Temperature | 4780 ±50 K |
| Metallicity | 0.31 ±0.05 |
| Age | 6.5+5.9 −4.1 × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| NStED | data |
| Extrasolar Planets Encyclopaedia |
data |
HAT-P-11, also designated GSC 03561-02092, is an orange dwarf metal rich star about 123 light-years away in the constellation Cygnus. This star is notable for its relatively large rate of proper motion. The magnitude of this star is about 9, which means it is not visible to the naked eye but can be seen with a medium sized amateur telescope on a clear dark night. The age of this star is about 6.5 billion years.[1]
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This star has one known extrasolar planet, HAT-P-11b, discovered by the HATNet Project using the transit method. This planet is a little larger than Neptune. This star system is within the field of view of the now-operational Kepler Mission planet-hunter spacecraft.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| HAT-P-11b | 0.081 ±0.009 MJ | 0.053 +0.0002 -0.0008 | 4.8878162 ±7.1e-06 | 0.198 ±0.046 |