(612095) 1999 OJ4

Template:Mp (provisional designation Template:Mp) is a trans-Neptunian object and binary system from the classical Kuiper belt, located in the outermost region of the Solar System. The bright cubewano belongs to the cold population and measures approximately Template:Convert in diameter. It was first observed at Mauna Kea Observatory on 18 July 1999. Discovered in 2005, its minor-planet moon is just 3 kilometers smaller than its primary and has an orbital period of 84 days.

Orbit and classification

Template:Mp orbit characterizes it as a classical Kuiper Belt object, or cubewano. Due to its nearly circular orbit and low inclination, it is also in the "cold" population of cubewanos. As a result, it is likely reddish in color.

Satellite

Template:Mp has one minor-planet moon. This moon was discovered by the Hubble Space Telescope on 5 October 2013. It orbits Template:Val away from 1999 OJ₄, completing one orbit every Template:Val. The orbit has an eccentricity of Template:Val.

At about 72 km, it is nearly the same size as Template:Mp. From the surface of 1999 OJ₄, S/2005 (1999 OJ₄) 1 would have an apparent diameter of roughly 8.11°, over fourteen times the apparent size of the Sun from Earth.

External links

• 1999 OJ4 – System parameters, Lowell Observatory
• List of Transneptunian Objects, Minor Planet Center
• List of binary asteroids/TNOs, Johnston's Archive
• Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
• Template:AstDys
• Template:JPL small body