HAT-P-5
G-type star
From Wikipedia, the free encyclopedia
HAT-P-5 is a 12th magnitude star in the constellation Lyra, approximately 1,000 light years away from Earth. It is a spectral type G star, about 1.16 solar masses and radii greater than the Sun, and only 200 kelvins hotter. It is estimated to be 2.6 billion years old.[7][8]
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 18h 17m 37.3127s[2] |
| Declination | +36° 37′ 17.170″[2] |
| Apparent magnitude (V) | +11.95 |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G1V[citation needed] |
| Variable type | planetary transit[3] |
| Astrometry | |
| Radial velocity (Rv) | 8.56±1.11[2] km/s |
| Proper motion (μ) | RA: 11.925(11) mas/yr[2] Dec.: 5.904(14) mas/yr[2] |
| Parallax (π) | 3.2184±0.0105 mas[2] |
| Distance | 1,013 ± 3 ly (311 ± 1 pc) |
| Details | |
| Mass | 1.157+0.043 −0.081[4] M☉ |
| Radius | 1.165+0.046 −0.052[4] R☉ |
| Surface gravity (log g) | 4.37 ± 0.03[5] cgs |
| Temperature | 5863 ± 80[5] K |
| Metallicity [Fe/H] | 0.10 ± 0.10[5] dex |
| Rotational velocity (v sin i) | 2.8 ± 1.0[5] km/s |
| Age | 2.6+2.1 −1.4[4] Gyr |
| Other designations | |
| Chasoň, TOI-2135, TIC 76419763, TYC 2634-1087-1, GSC 02634-01087, 2MASS J18173731+3637170, HAT-P-5[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
The star HAT-P-5 is named Chasoň. The name was selected in the NameExoWorlds campaign by Slovakia, during the 100th anniversary of the IAU. Chasoň is an ancient Slovak term for the Sun.[9][10]
Planetary system
On October 9, 2007, a report was submitted to The Astrophysical Journal Letters telling of the discovery of an exoplanet transiting HAT-P-5. The planet was described as a Jupiter-like hot Jupiter, with a radius about one and one quarter times that of Jupiter, and nearly the same mass. Its density was reported as 0.66 ± 0.11 g/cm3, and its inclination 86.75 ± 0.44°.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b / Kráľomoc | 1.02±0.10 MJ | 0.04073+0.00050 −0.00093 |
2.78847360(52) | <0.072 | 86.75±0.44 | 1.204±0.017[11] RJ |
