SWEEPS-04

SWEEPS-04

Exoplanet		List of exoplanets
Size comparison of SWEEPS-04 with Jupiter.
Parent star
Star		SWEEPS J175853.92−291120.6
Constellation		Sagittarius
Right ascension	(α)	17h 58m 53.92s
Declination	(δ)	−29° 11′ 20.6″
Apparent magnitude	(mV)	18.8
Distance		22000 ly (6600 pc)
Orbital elements
Semi-major axis	(a)	0.055 AU
Orbital period	(P)	4.2 d
Inclination	(i)	>87°
Physical characteristics
Mass	(m)	<3.8 MJ
Radius	(r)	0.81±0.1 RJ
Discovery information
Discovery date		October 4, 2006
Discoverer(s)		Sahu et al.
Discovery method		Transit
Discovery status		Confirmed
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

SWEEPS-04 is an extrasolar planet orbiting the star SWEEPS J175853.92−291120.6 in the constellation Sagittarius approximately 27,710 light years away (based on a distance modulus of 14.1) from the Solar System, making it (along with SWEEPS-11) the most distant exoplanet(s) known.^[1] This planet was found in 2006 by the Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS) program that uses the transit method.

The upper limit on the planet's mass is 3.8 times the mass of Jupiter. The best fit radius is 0.81 times that of Jupiter, but the uncertainty in this value is large, around 12%. It orbits at an average distance of 8,200,000 km (0.055 AU) from the parent star, taking 4.2 days to revolve around it.

• 
  HST SWEEPS-4 2006.jpg
• 
  Radial Velocities of SWEEPS-04 (UVES-VLT).jpg
• 
  Artist's impression of a transiting Jupiter-mass exoplanet SWEEPS J175853.92-291120.6 b.jpg

See also

• Sagittarius Window Eclipsing Extrasolar Planet Search or SWEEPS
• SWEEPS-10
• SWEEPS-11
• List of extrasolar planets

References

• Sahu, Kailash C.; Casertano, S; Bond, HE; Valenti, J; Smith, TE; Minniti, D; Zoccali, M; Livio, M; et al. (2006). "Transiting extrasolar planetary candidates in the Galactic bulge" (abstract). Nature. 443 (7111): 534–540. arXiv:astro-ph/0610098. Bibcode:2006Natur.443..534S. doi:10.1038/nature05158. PMID 17024085.  (web Preprint)

External links

Media related to SWEEPS-04 at Wikimedia Commons

• "SWEEPS-04". Exoplanets. Retrieved 2009-05-22. 

Coordinates: 17^h 58^m 54^s, −29° 11′ 21″