SWEEPS-04
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Sagittarius |
| Right ascension | 17h 58m 54s |
| Declination | -29° 11' 21"' |
| Apparent magnitude (V) | 18.8 |
| Astrometry | |
| Distance | 6500 ly (2000 pc) |
| Details | |
| Mass | 3.8 M☉ |
| Radius | 0.81 R☉ |
| Surface gravity (log g) | 13 |
| Database references | |
| SIMBAD | data |
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.055 AU |
| Orbital period | (P) | 4.2 d |
| Inclination | (i) | >87° |
| Angular distance | (θ) | 0.028 mas |
| Physical characteristics | ||
| Mass | (m) | <3.8 MJ |
| Radius | (r) | 0.81±0.1 RJ |
| Discovery information | ||
| Discovery date | 2006 | |
| Discoverer(s) | Sahu et al. | |
| Detection method | Transit | |
| Discovery status | Confirmed | |
SWEEPS-04 is an extrasolar planet orbiting the star SWEEPS J175853.92−291120.6 in the constellation Sagittarius approximately 6500 ly away from the Solar System. This planet was found in 2006 by the Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS) program that uses transit method.
This superjovian planet is about 3.8 times that of Jupiter. Despite of being a hot Jupiter, the planet is unusually small, only 81% the size of Jupiter probably due to its mass and the abundance of heavier elements in its interior. It is even smaller than Saturn. It orbits at the average distance of 8.2 Gm (0.055 AU) from the parent star, taking 4.2 days to revolve around it with zero eccentricity.
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