HAT-P-3

HAT-P-3
Observation data
Epoch 2000      Equinox 2000
Constellation Ursa Major[1]
Right ascension 13h 44m 22.592s[2]
Declination +48° 01′ 43.22″[2]
Apparent magnitude (V) 11.577 ± 0.067[3]
Characteristics
Spectral type K[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[5]
Apparent magnitude (H) 9.542 ± 0.028[5]
Apparent magnitude (K) 9.448 ± 0.025[5]
Astrometry
Proper motion (μ) RA: –21.8 ± 0.7[2] mas/yr
Dec.: –25.0 ± 1.1[2] mas/yr
Distance450 ± 33[6] ly
(138 ± 10[6] pc)
Absolute magnitude (MV)5.87 ± 0.15[6]
Details
Mass0.917 ± 0.030[6] M☉
Radius0.799 ± 0.039[6] R☉
Luminosity0.435 ± 0.053[6] L☉
Surface gravity (log g)4.58 ± 0.03[7] cgs
Temperature5224 ± 69[7] K
Metallicity [Fe/H]0.41 ± 0.08[7] dex
Rotational velocity (v sin i)1.5 ± 1.0[7] km/s
Age1.6 +2.9
−1.3[6] Myr
Other designations
GSC 03466-00819, 2MASS J13442258+4801432, 1SWASP J134422.58+480143.2, TYC 3466-819-1[5]

HAT-P-3, is a metal-rich K star located about 450 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.[4][8]

Planetary system

This star is home to the extrasolar planet HAT-P-3b discovered by the HATNet Project using the transit method.[4]

The HAT-P-3 planetary system[6][8][9]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.591 ± 0.018 MJ 0.03866 ± 0.00042 2.8997382 ± 0.0000009 0(Adopted) 87.07 ± 0.55° 0.827 ± 0.055 RJ

See also

References

  1. ↑ 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
  2. 1 2 3 4 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal. 145 (2). 44. arXiv:1212.6182Freely accessible. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry
  3. 1 2 3 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/0610529Freely accessible. Bibcode:2006PASP..118.1666D. doi:10.1086/510197.Vizier catalog entry
  4. 1 2 3 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:0707.4268Freely accessible. Bibcode:2007ApJ...666L.121T. doi:10.1086/521792.
  5. 1 2 3 4 5 "TYC 3466-819-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2013-10-29.
  6. 1 2 3 4 5 6 7 8 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:1103.3078Freely accessible. Bibcode:2011AJ....141..179C. doi:10.1088/0004-6256/141/6/179.
  7. 1 2 3 4 Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal. 757 (2). 161. arXiv:1208.1268Freely accessible. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
  8. 1 2 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:1305.0833Freely accessible. Bibcode:2013ApJ...770..102T. doi:10.1088/0004-637X/770/2/102.
  9. ↑ Sada, Pedro V.; et al. (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory". Publications of the Astronomical Society of the Pacific. 124 (913): 212–229. arXiv:1202.2799Freely accessible. Bibcode:2012PASP..124..212S. doi:10.1086/665043.

Coordinates: 13h 44m 23s, +48° 01′ 43″


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