HD 89744

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HD 89744
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 10h 11m 10.5621s
Declination +41° 13′ 46.308″
Apparent magnitude (V) 5.74
Absolute magnitude (V) 2.83[1]
Distance 130 ly
(40 pc)
Spectral type F7IV
Other designations
BD+41°2076, GCRV 6516, GJ 9326, HIP 50786, HR 4067, NLTT 24128, SAO 43309
Database references
SIMBAD data
Exoplanet Archive data
ARICNS data
Extrasolar Planets
Encyclopaedia
data

HD 89744 is an F-dwarf star about 130 light years away in the constellation of Ursa Major. In April 2000, a planet was discovered by radial velocity method.[2]

This star has 1.45 times the mass of the Sun, with a projected rotational velocity of 8.0 km s−1.[1]

The HD 89744 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >8.58 ± 0.71 MJ 0.934 ± 0.054 256.80 ± 0.13 0.6770 ± 0.0072

Stellar components[edit]

In 2004, stellar companion HD 89744 B (~0.076 solar mass) with a projected separation of 2,456 AU was detected.[4]

See also[edit]

References[edit]

  1. ^ a b Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics 361: 614–628, Bibcode:2000A&A...361..614P 
  2. ^ Korzennik, Sylvain G. et al. (2000). "A High-Eccentricity Low-Mass Companion to HD 89744". The Astrophysical Journal Letters 533 (2): L147–L150. arXiv:astro-ph/0003045. Bibcode:2000ApJ...533L.147K. doi:10.1086/312611. 
  3. ^ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 
  4. ^ Mugrauer, M.; Neuhäuser; Seifahrt; Mazeh; Guenther (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics 440 (3): 1051–1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297. Retrieved 2010-01-01. 

External links[edit]

Coordinates: Sky map 10h 11m 10.5621s, +41° 13′ 46.308″