HAT-P-4

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HAT-P-4
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 19m 57.922s[1]
Declination +36° 13′ 46.73″[1]
Apparent magnitude (V) 11.0[2]
Characteristics
Spectral type F[2]
B−V color index 0.771
Astrometry
Proper motion (μ) RA: –21.9 ± 1.2[1] mas/yr
Dec.: –23.4 ± 0.7[1] mas/yr
Parallax (π) 0.2 mas
Distance 1010.6 ± 97.8 ly
(310 ± 30 pc)
Absolute magnitude (MV) 11.7
Details
Mass ~ 1.26 M
Radius 1.59 ± 0.07 R
Luminosity 0.41 L
Surface gravity (log g) 4.14 ± 0.03[3] cgs
Temperature 5890 ± 67[3] K
Metallicity [Fe/H] 0.20 ± 0.08[3] dex
Rotational velocity (v sin i) 5.6 ± 0.9[3] km/s
Age ~4.2 Gyr
Other designations
BD+36°2593, SAO 64638, AG+36° 1339, GSC 02569-01599, PPM 78511, TYC 2569-1599-1
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HAT-P-4 is a F9-type main-sequence star in the constellation of Boötes.[2] It is also designated BD+36°2593.

Planetary System[edit]

This star is home to the transiting extrasolar planet HAT-P-4b.[4]

The HAT-P-4 system[5][6]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 0.68 ± 0.04 MJ 0.04465 ± 0.00042 3.0565254 ± 0.0000012 0

See also[edit]

References[edit]

  1. ^ 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
  2. ^ a b c "SIMBAD query result: NAME HAT-P-4 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24. 
  3. ^ 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. 
  4. ^ Kovács, G. et al. (2007). "HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter". The Astrophysical Journal Letters 670 (1): L41–L44. arXiv:0710.0602. Bibcode:2007ApJ...670L..41K. doi:10.1086/524058. 
  5. ^ 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. 
  6. ^ 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]

Coordinates: Sky map 15h 19m 58s, +36° 13′ 47″