HAT-P-5
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 our Sun, and only 200 kelvins hotter. It is estimated to be 2.6 billion years old.[1][2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra[3] |
| Right ascension | 18h 17m 37.3129s[4] |
| Declination | +36° 37′ 17.164″[4] |
| Apparent magnitude (V) | +11.95 |
| Characteristics | |
| Spectral type | G1V |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: 11.738±0.690[4] mas/yr Dec.: 6.342±0.788[4] mas/yr |
| Parallax (π) | 3.22 ± 0.24[4] mas |
| Distance | 1,010 ± 80 ly (310 ± 20 pc) |
| Details | |
| Mass | 1.16 ± 0.062 M☉ |
| Radius | 1.167 ± 0.049 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 ± 1.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | 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 Sun.[6][7]
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°.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.06 ± 0.11 MJ | 0.04075 ± 0.00076 | 2.788491 ± 2.5e-05 | 0 | — | — |
References
- "Notes for Planet HAT-P-5 b". Extrasolar Planets Encyclopaedia. Archived from the original on June 20, 2012. Retrieved October 16, 2007.
- "Simbad Query Result". Simbad. Retrieved October 16, 2007.
- Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034.Vizier query form
- Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.Gaia Data Release 1 catalog entry
- Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal. 757 (2). 161. arXiv:1208.1268. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- Bakos, G. Á.; et al. (2007). "HAT-P-5b: A Jupiter-like Hot Jupiter Transiting a Bright Star". The Astrophysical Journal Letters. 671 (2): L173–L176. arXiv:0710.1841. Bibcode:2007ApJ...671L.173B. doi:10.1086/525022.