HD 81040

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HD 81040
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 09h 23m 47.0873s
Declination +20° 21′ 52.034″
Apparent magnitude (V) +7.74
Distance 106.2 ly
(32.56 pc)
Spectral type G2/G3
Other designations
BD+20°2374, FK5 4836, HIP46070, SAO80800
Database references
SIMBAD data

HD 81040 is a star in the constellation of Leo. It is G-type yellow dwarf like our Sun.

The Sun dwarfs HD 81040 in terms of physical characteristics. The age of the star is not precisely known; the ELODIE spectrograph suggested 0.8 Gyr and found it to have a young dust disk. Later measurements by modelling chromosperic activity suggested an age of 4.18 Gyr.

Planetary system[edit]

On November 24, 2005, a superjovian planet was announced by Sozzetti.

The HD 81040 planetary system[1]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >6.86 ± 0.71 MJ 1.94 1001.7 ± 7.0 0.526 ± 0.042

See also[edit]

References[edit]

  1. ^ Sozzetti, A. et al. (2006). "A massive planet to the young disc star HD 81040". Astronomy and Astrophysics 449 (1): 417–424. arXiv:astro-ph/0511679. Bibcode:2006A&A...449..417S. doi:10.1051/0004-6361:20054303. 

External links[edit]

Coordinates: Sky map 09h 23m 47.0873s, +20° 21′ 52.034″