HAT-P-3

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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
Distance 450 ± 33[6] ly
(138 ± 10[6] pc)
Absolute magnitude (MV) 5.87 ± 0.15[6]
Details
Mass 0.917 ± 0.030[6] M
Radius 0.799 ± 0.039[6] R
Luminosity 0.435 ± 0.053[6] L
Surface gravity (log g) 4.58 ± 0.03[7] cgs
Temperature 5224 ± 69[7] K
Metallicity [Fe/H] 0.41 ± 0.08[7] dex
Rotational velocity (v sin i) 1.5 ± 1.0[7] km/s
Age 1.6 +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[edit]

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[8][9][6]
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[edit]

References[edit]

  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. ^ a b c d 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
  3. ^ a b c 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. Vizier catalog entry
  4. ^ a b c 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. 
  5. ^ a b c d e "TYC 3466-819-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2013-10-29. 
  6. ^ a b c d e f g h 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. 
  7. ^ a b c d 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. 
  8. ^ a b 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. 
  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:1202.2799. Bibcode:2012PASP..124..212S. doi:10.1086/665043. 

External links[edit]

  • "HAT-P-3". Exoplanets. Retrieved 2009-05-18. 

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