Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Gemini |
Right ascension | 07h 27m 39.9489s [1] |
Declination | +24° 20′ 11.516″ [1] |
Apparent magnitude (V) | 11.35 [2] |
Characteristics | |
Spectral type | K3V |
Astrometry | |
Radial velocity (Rv) | -18.559 km/s |
Proper motion (μ) |
RA: −5.104(18)
mas/
yr
[1] Dec.: −96.090(16) mas/ yr [1] |
Parallax (π) | 14.0065 ± 0.0176 mas [1] |
Distance | 232.9 ± 0.3
ly (71.40 ± 0.09 pc) |
Details [3] [4] | |
Mass | 0.798±0.018 M☉ |
Radius | 0.744±0.011 R☉ |
Surface gravity (log g) | 4.52±0.09 cgs |
Temperature | 4595±45 K |
Metallicity | 0.22±0.09 |
Rotation | 14.66±0.03 d |
Rotational velocity (v sin i) | 2.0±0.5 km/s |
Age | 0.8 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HAT-P-20 is a
K-type main-sequence star about 233 light-years away. The star has a strong
starspot activity,
[3] and its equatorial plane is misaligned by 36+10
−12° with the planetary orbit.
[4] Although star with a giant planet on close orbit is expected to be spun-up by tidal forces, only weak indications of tidal spin-up were detected.
[5]
In 2010 a transiting hot super-Jovian planet was detected. [6] Its equilibrium temperature is 996±19 K.
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 7.59±0.12 MJ | 0.03671±0.00027 | 2.8753172±0.0000003 | 0.0172±0.0016 | 86.3±0.1 ° | 0.952±0.017 RJ |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Gemini |
Right ascension | 07h 27m 39.9489s [1] |
Declination | +24° 20′ 11.516″ [1] |
Apparent magnitude (V) | 11.35 [2] |
Characteristics | |
Spectral type | K3V |
Astrometry | |
Radial velocity (Rv) | -18.559 km/s |
Proper motion (μ) |
RA: −5.104(18)
mas/
yr
[1] Dec.: −96.090(16) mas/ yr [1] |
Parallax (π) | 14.0065 ± 0.0176 mas [1] |
Distance | 232.9 ± 0.3
ly (71.40 ± 0.09 pc) |
Details [3] [4] | |
Mass | 0.798±0.018 M☉ |
Radius | 0.744±0.011 R☉ |
Surface gravity (log g) | 4.52±0.09 cgs |
Temperature | 4595±45 K |
Metallicity | 0.22±0.09 |
Rotation | 14.66±0.03 d |
Rotational velocity (v sin i) | 2.0±0.5 km/s |
Age | 0.8 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HAT-P-20 is a
K-type main-sequence star about 233 light-years away. The star has a strong
starspot activity,
[3] and its equatorial plane is misaligned by 36+10
−12° with the planetary orbit.
[4] Although star with a giant planet on close orbit is expected to be spun-up by tidal forces, only weak indications of tidal spin-up were detected.
[5]
In 2010 a transiting hot super-Jovian planet was detected. [6] Its equilibrium temperature is 996±19 K.
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 7.59±0.12 MJ | 0.03671±0.00027 | 2.8753172±0.0000003 | 0.0172±0.0016 | 86.3±0.1 ° | 0.952±0.017 RJ |