HAT-P-6
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 23h 39m 05.8108s[2] |
| Declination | +42° 27′ 57.502″[2] |
| Apparent magnitude (V) | +10.54 |
| Characteristics | |
| Spectral type | F |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: −20.2±0.6[3] mas/yr Dec.: 2.6±0.5[3] mas/yr |
| Parallax (π) | 3.59 ± 0.35[2] mas |
| Distance | 910 ± 90 ly (280 ± 30 pc) |
| Absolute magnitude (MV) | +4.03 |
| Details | |
| Mass | 1.29 ± 0.06 M☉ |
| Radius | 1.46 ± 0.06 R☉ |
| Luminosity | 3.55 L☉ |
| Surface gravity (log g) | 4.22 ± 0.03[4] cgs |
| Temperature | 6687 ± 71[4] K |
| Metallicity [Fe/H] | –0.11 ± 0.08[4] dex |
| Rotational velocity (v sin i) | 8.9 ± 1.2[4] km/s |
| Age | 2.3+0.5 −0.7 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
HAT-P-6 is a star in the constellation Andromeda, located approximately 910 light years or 280 parsecs away from the Earth. It is an F-type star, implying that it is hotter and more massive than our Sun. The apparent magnitude of the star is +10.54, which means that it can only be visible through the telescope. The absolute magnitude of +4.03 is brighter than the Sun’s +4.83, meaning that the star itself is brighter than the Sun.[5] A search for a binary companion star using adaptive optics at the MMT Observatory turned out negative.[6]
Planetary system
The companion planet HAT-P-6b is a transiting planet discovered on October 15, 2007 by the HATNet Project. The planet’s true mass is slightly more than Jupiter at only 5.7%, but the radius is 33% greater, making the planet’s density of 0.45 g/cm3. Its large size compared to mass comes from the great amount of heat received from the nearby star that expands the planet’s atmosphere, categorizing as "hot Jupiter". The orbital period is 3.852985 days and the distance from its star is 0.05235 AU. The inclination of the orbit is 85.51º.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.106+0.039 −0.040 MJ |
0.05239+0.00080 −0.00082 |
3.852985±0.000005 | <0.044 | — | — |
See also
References
- ↑ 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
- 1 2 3 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
- 1 2 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal. 145 (2). 44. arXiv:1212.6182. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44. Vizier catalog entry
- 1 2 3 4 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.
- 1 2 3 Noyes, R. W.; et al. (2008). "HAT-P-6b: A Hot Jupiter Transiting a Bright F Star". The Astrophysical Journal Letters. 673 (1): L79–L82. arXiv:0710.2894. Bibcode:2008ApJ...673L..79N. doi:10.1086/527358.
- ↑ Adams, E. R.; et al. (2013). "Adaptive Optics Images. II. 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets". The Astronomical Journal. 146 (1). 9. arXiv:1305.6548. Bibcode:2013AJ....146....9A. doi:10.1088/0004-6256/146/1/9.
- ↑ Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics. 602. A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.
