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.
On November 24, 2005, a superjovian planet was announced by Sozzetti.
* List of extrasolar planets
1. ^ Sozzetti et al.; Udry, S.; Zucker, S.; Torres, G.; Beuzit, J. L.; Latham, D. W.; Mayor, M.; Mazeh, T. et al. (2006). "A massive planet to the young disc star HD 81040" (abstract). Astronomy and Astrophysics 449 (1): 417–424. doi:10.1051/0004-6361:20054303. http://www.aanda.org/articles/aa/abs/2006/13/aa4303-05/aa4303-05.html. (web preprint)
* The Extrasolar Planets Encyclopaedia: HD 81040