HD 36584

HD 36584 (HR 1859; 24 G. Doradus) is a visual binary located in the southern constellation Dorado. The primary has an apparent magnitude of 6.62 and the secondary has an apparent magnitude of 6.91, making both stars visible in a telescope but not to the naked eye. The system is located relatively close at a distance of 263 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of $$. The system has a combined absolute magnitude of 1.57.

HD 36584 was first discovered to be a double star in 1898 by astronomer R.T.A Innes. At the time of discovery, the components had a separation of only half an arcsecond and the secondary was located at a position angle of 210°. The separation between the components increased to 1.34" and the position angle of the secondary shifted to 162° in 1997. At this separation, the components can be resolved in an amateur telescope, but the individual characteristics of both stars cannot be studied. As of 2015, the secondary is located at a distance of 1.4" along a position angle of 159°. The two stars take about 795 years to circle each other in a very eccentric orbit.

The system has a combined stellar classification of F0 IV/V, indicating that it is an evolved F-type star that has the blended luminosity class of a subgiant and main sequence star. The components have masses 1.69 and 1.57 times that of the Sun respectively.