HAT-P-30
G-type main-sequence star
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HAT-P-30, also known as WASP-51, is the primary of a binary star system about 679 light-years away in the constellation Hydra. It is a G-type main-sequence star. HAT-P-30 has a similar concentration of heavy elements compared to the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra[1] |
| Right ascension | 08h 15m 47.9802s[2] |
| Declination | +05° 50′ 12.351″[2] |
| Apparent magnitude (V) | 10.35[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G0[4] |
| Astrometry | |
| Radial velocity (Rv) | 45.14±0.37[2] km/s |
| Proper motion (μ) | RA: −17.231 mas/yr[2] Dec.: +23.875 mas/yr[2] |
| Parallax (π) | 4.8037±0.0148 mas[2] |
| Distance | 679 ± 2 ly (208.2 ± 0.6 pc) |
| Details | |
| Mass | 1.175±0.025[5] M☉ |
| Radius | 1.314±0.015[5] R☉ |
| Luminosity | 2.37±0.01[2] L☉ |
| Surface gravity (log g) | 4.270±0.007[5] cgs |
| Temperature | 6,252±100[5] K |
| Metallicity [Fe/H] | −0.079±0.079[5] dex |
| Rotational velocity (v sin i) | 3.6±0.4[6] km/s |
| Age | 4.1±0.6[2] Gyr |
| Other designations | |
| HAT-P-30, BD+06 1909, TOI-490, TIC 455135327, WASP-51, GSC 00208-00722, 2MASS J08154797+0550121[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
The faint stellar companion was detected in 2013 at a projected separation of 3.842±0.007″.[8]
Planetary system
In 2011 a transiting hot Jupiter planet, HAT-P-30b, was independently detected by two teams, the HATNet Project[9] and the Wide Angle Search for Planets (WASP).[6]
The planetary orbit is strongly misaligned with the equatorial plane of the star, the misalignment angle being equal to 73.5±9.0°.[9]
Since 2022, an additional planet in the system is suspected based on transit timing variations.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | 0.723±0.023 MJ | 0.04114±0.00030 | 2.8106006(4) | <0.016[10] | 82.56±0.08 | 1.426±0.020 RJ |