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Exoplanet List of exoplanets
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
Semi-major 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
Exoplanet Archive data
Open Exoplanet Catalogue data

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; 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:0711.1746Freely accessible. 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″