# Lupus-TR-3b

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Hot Jupiter

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

**Lupus-TR-3b** is an [extrasolar planet](/source/Extrasolar_planet) orbiting the star [Lupus-TR-3](/source/Lupus-TR-3) (a [K-type main sequence star](/source/K-type_main_sequence_star) approximately 8,950 [light-years](/source/Light-year) away in the [constellation](/source/Constellation) [Lupus](/source/Lupus_(constellation))). The planet was discovered in 2007 by personnel from the [Center for Astrophysics | Harvard & Smithsonian](/source/Harvard-Smithsonian_Center_for_Astrophysics) observing at the [Siding Spring Observatory](/source/Siding_Spring_Observatory) in [Australia](/source/Australia), by the [transit method](/source/Transit_method).

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

## See also

- [Harvard-Smithsonian Center for Astrophysics](/source/Harvard-Smithsonian_Center_for_Astrophysics)

## References

1. **[^](#cite_ref-disc_1-0)** 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?"](http://www.iop.org/EJ/article/1538-4357/675/1/L37/22389.html). *The Astrophysical Journal Letters*. **675** (1): L37–L40. [arXiv](/source/ArXiv_(identifier)):[0711.1746](https://arxiv.org/abs/0711.1746). [Bibcode](/source/Bibcode_(identifier)):[2008ApJ...675L..37W](https://ui.adsabs.harvard.edu/abs/2008ApJ...675L..37W). [doi](/source/Doi_(identifier)):[10.1086/529519](https://doi.org/10.1086%2F529519). [S2CID](/source/S2CID_(identifier)) [13285272](https://api.semanticscholar.org/CorpusID:13285272).

## External links

Media related to [Lupus-TR-3b](https://commons.wikimedia.org/wiki/Category:Lupus-TR-3_b) at Wikimedia Commons

- Bayliss; Weldrake, David T. F.; Sackett, Penny D.; Tingley, Brandon W.; Lewis, Karen M. (2009). ["The Lupus Transit Survey for Hot Jupiters: Results and Lessons"](http://www.iop.org/EJ/abstract/1538-3881/137/5/4368). *[The Astronomical Journal](/source/The_Astronomical_Journal)*. **137** (5): 4368–4376. [arXiv](/source/ArXiv_(identifier)):[0903.5121](https://arxiv.org/abs/0903.5121). [Bibcode](/source/Bibcode_(identifier)):[2009AJ....137.4368B](https://ui.adsabs.harvard.edu/abs/2009AJ....137.4368B). [doi](/source/Doi_(identifier)):[10.1088/0004-6256/137/5/4368](https://doi.org/10.1088%2F0004-6256%2F137%2F5%2F4368). [S2CID](/source/S2CID_(identifier)) [16189693](https://api.semanticscholar.org/CorpusID:16189693).

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