SWEEPS-10
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 59m 02.00s |
| Declination | -29° 13' 23.7"' |
| Apparent magnitude (V) | 26.23 |
| Astrometry | |
| Distance | 6500 ly (2000 pc) |
| Details | |
| Mass | 0.44 M☉ |
| Radius | 0.41 R☉ |
| Database references | |
| SIMBAD | data |
SWEEPS-10 is, as of June 2007, the planet candidate with the shortest orbital period yet found. It completes an orbit of its star (designated SWEEPS J175902.00−291323.7) in just 10 hours. Located only 1.2 million kilometers from its star (roughly three times the distance between the Earth and the Moon), the planet is among the hottest ever detected; its estimated temperature is approximately 1650 degrees Celsius. "This star-hugging planet must be at least 1.6 times the mass of Jupiter, otherwise the star's gravitational muscle would pull the planet apart," said team leader Kailash Sahu of the Space Telescope Science Institute in Baltimore, Maryland. Such ultra-short period planets (USPPs) seem to occur only around dwarf stars.
The small star's relatively low temperature allows the planet to exist. "USPPs occur preferentially around normal red dwarf stars that are smaller and cooler than our Sun," Sahu said.[1]
Template:Planetbox begin Template:Planetbox orbit Template:Planetbox character Template:Planetbox discovery Template:Planetbox end
See also
- SWEEPS stands for Sagittarius Window Eclipsing Extrasolar Planet Search
- SWEEPS-04
- SWEEPS-11
References
- ^ Hubble's SWEEPS 10 Jeremy McGovern, October 4, 2006, Astronomy Magazine.
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