HAT-P-30, also known as WASP-51, is the primary of a binary star system about 700 light-years away. 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 |
| Right ascension | 08h 15m 47.9802s[1] |
| Declination | +05° 50′ 12.351″[1] |
| Apparent magnitude (V) | 10.35[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | G0[3] |
| Astrometry | |
| Radial velocity (Rv) | 44.14[1] km/s |
| Proper motion (μ) | RA: −17.231[1] mas/yr Dec.: +23.875[1] mas/yr |
| Parallax (π) | 4.8037 ± 0.0099 mas[1] |
| Distance | 679 ± 1 ly (208.2 ± 0.4 pc) |
| Details | |
| Mass | 1.175±0.025[4] M☉ |
| Radius | 1.314±0.015[4] R☉ |
| Luminosity | 2.37±0.01[1] L☉ |
| Surface gravity (log g) | 4.270±0.007[4] cgs |
| Temperature | 6,252±100[4] K |
| Metallicity [Fe/H] | −0.079±0.079[4] dex |
| Rotational velocity (v sin i) | 3.6±0.4[5] km/s |
| Age | 4.1±0.6[1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The faint stellar companion was detected in 2013 at a projected separation of 3.842±0.007″.[7]
Planetary system
In 2011 a transiting hot Jupiter planet b was independently detected by two teams.[8][5]
The planetary orbit is strongly misaligned with the equatorial plane of the star, the misalignment angle being equal to 73.5±9.0°.[8]
Since 2022, an additional planet in the system is suspected based on transit timing variations.[4]
| 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±0.0000004 | 0 | 82.56±0.08° | 1.426±0.020 RJ |
References
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