HAT-P-3
HAT-P-3, is a metal-rich K5 dwarf star located about 441 light-years away in the constellation Ursa Major. At a magnitude of about 11.5 it is not visible to the naked eye but is visible in a small to medium-sized amateur telescope. It is believed to be a relatively young star and has a slightly enhanced level of chromospheric activity.[7][9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major[1] |
| Right ascension | 13h 44m 22.5939s[2] |
| Declination | +48° 01′ 43.2063″[2] |
| Apparent magnitude (V) | 11.577 ± 0.067[3] |
| Characteristics | |
| Spectral type | K5[4] |
| Apparent magnitude (B) | 12.53 ± 0.20[5] |
| Apparent magnitude (V) | 11.577 ± 0.067[3] |
| Apparent magnitude (I) | 10.504 ± 0.079[3] |
| Apparent magnitude (J) | 9.936±0.022[6] |
| Apparent magnitude (H) | 9.542±0.028[6] |
| Apparent magnitude (K) | 9.448±0.025[6] |
| Astrometry | |
| Radial velocity (Rv) | −23.8±0.1[7] km/s |
| Proper motion (μ) | RA: −19.746±0.034[2] mas/yr Dec.: −24.008±0.038[2] mas/yr |
| Parallax (π) | 7.4031 ± 0.0262[2] mas |
| Distance | 441 ± 2 ly (135.1 ± 0.5 pc) |
| Absolute magnitude (MV) | 5.87 ± 0.15[8] |
| Details | |
| Mass | 0.925+0.031 −0.0134[4] M☉ |
| Radius | 0.850+0.021 −0.010[4] R☉ |
| Luminosity | 0.435±0.053[8] L☉ |
| Surface gravity (log g) | 4.58±0.10[4] cgs |
| Temperature | 5,190±80[4] K |
| Metallicity [Fe/H] | 0.24±0.08[4] dex |
| Rotational velocity (v sin i) | 1.4±0.5[4] km/s |
| Age | 2.9+1.7 −3.7[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star HAT-P-3 is named Dombay. The name was selected in the NameExoWorlds campaign by Russia, during the 100th anniversary of the IAU. Dombay is a resort region in the North Caucasus mountains.[10][11]
Planetary system
This star is home to the extrasolar planet HAT-P-3b discovered by the HATNet Project using the transit method.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.609+0.021 −0.022 MJ |
0.03899+0.00062 −0.00065 |
2.8997360±0.0000020 | <0.0100 | 87.07 ± 0.55° | 0.827 ± 0.055 RJ |
See also
- List of transiting extrasolar planets
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
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Droege, Thomas F.; et al. (2006). "TASS Mark IV Photometric Survey of the Northern Sky". The Publications of the Astronomical Society of the Pacific. 118 (850): 1666–1678. arXiv:astro-ph/0610529. Bibcode:2006PASP..118.1666D. doi:10.1086/510197. JSTOR 10.1086/510197. S2CID 11716917.Vizier catalog entry
- Mancini, L.; Esposito, M.; Covino, E.; Southworth, J.; Biazzo, K.; Bruni, I.; Ciceri, S.; Evans, D.; Lanza, A. F.; Poretti, E.; Sarkis, P.; Smith, A. M. S.; Brogi, M.; Affer, L.; Benatti, S.; Bignamini, A.; Boccato, C.; Bonomo, A. S.; Borsa, F.; Carleo, I.; Claudi, R.; Cosentino, R.; Damasso, M.; Desidera, S.; Giacobbe, P.; González-Álvarez, E.; Gratton, R.; Harutyunyan, A.; Leto, G.; et al. (2018). "The GAPS programme with HARPS-N at TNG". Astronomy & Astrophysics. 613: A41. arXiv:1802.03859. Bibcode:2018A&A...613A..41M. doi:10.1051/0004-6361/201732234. S2CID 73565379.
- "TYC 3466-819-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2013-10-29.
- Skrutskie, M. F.; et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.Vizier catalog entry
- Torres, G.; et al. (2007). "HAT-P-3b: A Heavy-Element-rich Planet Transiting a K Dwarf Star". The Astrophysical Journal Letters. 666 (2): L121–L124. arXiv:0707.4268. Bibcode:2007ApJ...666L.121T. doi:10.1086/521792. S2CID 16549542.
- Chan, Tucker; et al. (2011). "The Transit Light-curve Project. XIV. Confirmation of Anomalous Radii for the Exoplanets TrES-4b, HAT-P-3b, and WASP-12b". The Astronomical Journal. 141 (6). 179. arXiv:1103.3078. Bibcode:2011AJ....141..179C. doi:10.1088/0004-6256/141/6/179. S2CID 56378813.
- Todorov, Kamen O.; et al. (2013). "Warm Spitzer Photometry of Three Hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b". The Astrophysical Journal. 770 (2). 102. arXiv:1305.0833. Bibcode:2013ApJ...770..102T. doi:10.1088/0004-637X/770/2/102. S2CID 51509956.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- 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. S2CID 118923163.
External links
- "HAT-P-3". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2009-05-18.
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