WASP-76
Star in the Pisces constellation
From Wikipedia, the free encyclopedia
WASP-76, also known as BD+01 316, is a yellow-white main sequence star in the constellation of Pisces. A suspected stellar companion at a projected separation of 85 astronomical units was reported in 2014.[8]
.jpg)
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces[2] |
| Right ascension | 01h 46m 31.8576s[3] |
| Declination | 02° 42′ 02.030″[3] |
| Apparent magnitude (V) | 9.52[4] |
| Characteristics | |
| Evolutionary stage | main sequence[5][3] |
| Spectral type | F7[5] |
| B−V color index | 0.61 |
| J−H color index | 0.21 |
| J−K color index | 0.3 |
| Astrometry | |
| Radial velocity (Rv) | −1.152±0.0033[6] km/s |
| Proper motion (μ) | RA: +45.531[3] mas/yr Dec.: −40.593[3] mas/yr |
| Parallax (π) | 5.2899±0.0826 mas[3] |
| Distance | 617 ± 10 ly (189 ± 3 pc) |
| Details | |
| Mass | 1.280±0.028[7] M☉ |
| Radius | 1.667±0.020[7] R☉ |
| Luminosity | 4.6[3] L☉ |
| Surface gravity (log g) | 4.4±0.1[5] cgs |
| Temperature | 6,250±100[5] K |
| Metallicity [Fe/H] | 0.23±0.1[5] dex |
| Rotational velocity (v sin i) | 3.3±0.6[5] km/s |
| Age | 5.3+6.1 −2.9[5] Gyr |
| Other designations | |
| WASP-76, 2MASS J01463185+0242019, Gaia DR3 2512326349403275520 | |
| Database references | |
| SIMBAD | data |
After about five billion years, WASP-76 has expanded and become more luminous than at the start of its main sequence life, but most probably has not yet reached the subgiant branch.[3][5]
Planetary system
The "hot Jupiter" class planet WASP-76b was discovered around WASP-76 in 2013.
Analysis of transit-timing variations suggest an additional planet in the system.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.92 MJ | 0.0316±0.0002 | 1.80988132(12) | 0.00087±0.00031 | 87.88±0.16° | 1.842±0.024 RJ |