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Extrasolar planet List of extrasolar planets
Exoplanet Comparison Lupus-TR-3 b.png
Size comparison of Lupus-TR-3b with Jupiter.
Parent star
Star Lupus-TR-3
Constellation Lupus
Right ascension (α) 15h 30m 18.67s
Declination (δ) −42° 58′ 41.5″
Distance 8950 ly
(2744 pc)
Spectral type K1V
Orbital elements
Semimajor axis (a) 0.0464 ± 0.0007 AU
Eccentricity (e) 0
Orbital period (P) 3.91405 ± 4e-5 d
Inclination (i) 88.3+1.3-0.8°
Time of periastron (T0) 2453887.0818 JD
Semi-amplitude (K) 114 ± 25 m/s
Physical characteristics
Mass (m) 0.81 ± 0.18 MJ
Radius (r) 0.89 ± 0.07 RJ
Density (ρ) 1400 ± 400 kg m-3
Discovery information
Discovery date November 12, 2007
Discoverer(s) Weldrake et al.
Discovery method Transit
Discovery site Siding Spring Observatory
Discovery status Published
Database references
Extrasolar Planets

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 Harvard-Smithsonian Center for Astrophysics observing at the Siding Spring Observatory in Australia, by the transit method.

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[edit]


  1. ^ Weldrake et al.; Bayliss, Daniel D. R.; Sackett, Penny D.; Tingley, Brandon W.; Gillon, Michaël; Setiawan, Johny (2008). "Lupus-TR-3b: A Low-Mass Transiting Hot Jupiter in the Galactic Plane?". The Astrophysical Journal Letters 675 (1): L37–L40. arXiv:0711.1746. Bibcode:2008ApJ...675L..37W. doi:10.1086/529519. 

External links[edit]

Media related to Lupus-TR-3b at Wikimedia Commons

Coordinates: Sky map 15h 30m 18.67s, −42° 58′ 41.5″