Lupus-TR-3b

Lupus-TR-3b is an extrasolar planet orbiting the star Lupus-TR-3 (a K-type main sequence star approximately 8,950 light-years away in the constellation Lupus). The planet was discovered in 2007 by personnel from the Center for Astrophysics | Harvard & Smithsonian observing at the Siding Spring Observatory in Australia, by the transit method.

Lupus-TR-3b

Size comparison of Lupus-TR-3b with Jupiter.
Discovery
Discovered by	Weldrake et al.
Discovery site	Siding Spring Observatory
Discovery date	November 12, 2007
Detection method	Transit
Orbital characteristics
Semi-major axis	0.0464 ± 0.0007 AU (6,940,000 ± 100,000 km)
Eccentricity	0
Orbital period (sidereal)	3.91405 ± 4e-5 d
Inclination	88.3+1.3−0.8
Time of periastron	2453887.0818
Semi-amplitude	114 ± 25
Star	Lupus-TR-3
Physical characteristics
Mean radius	0.89 ± 0.07 RJ
Mass	0.81 ± 0.18 MJ
Mean density	1.40 ± 0.40 g/cm3

The planet has four-fifths the mass of Jupiter, nine-tenths the radius, and has density of 1.4 g/cm³. This planet is a typical “Hot Jupiter” as it orbits at 0.0464 AU distance from the star, taking 3.9 days to orbit. It is currently the faintest ground-based detection of a transiting planet.^[1]

See also

• Harvard-Smithsonian Center for Astrophysics