GQ Lupi b

Planetbox begin
name = GQ Lupi bPlanetbox star
star = GQ Lupi
constell = Lupus
RA = RA|15|49|12.144SIMBAD link|V*+GQ+Lup|GQ Lupi, entry, SIMBAD. Accessed on line June 13, 2008.]
DEC = DEC|−35|39|03.95
dist_ly = ~500
dist_pc = ~160Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion, Ralph Neuhaeuser, Markus Mugrauer, Andreas Seifahrt, Tobias Schmidt, and Nikolaus Vogt, "Astronomy and Astrophysics" 484, #1 (2008), pp. 281–291. doi|10.1051/0004-6361:20078493. bibcode|2008A&A...484..281N]
class = K7VPlanetbox orbit
separation = 103 ± 37 [http://exoplanet.eu/planet.php?p1=GQ+Lup&p2=b Planet : GQ Lup b] , "Extrasolar Planets Encyclopaedia". Accessed on line June 13, 2008] Planetbox character
mass = 1 – 36
radius = 3.0 ± 0.5
temperature = 2650 ± 100Planetbox discovery
discovery_date = April 2005
discoverers = Neuhäuser et al.
discovery_method = Imaged
discovery_site = Paranal Observatory,
Chile
discovery_status = PublishedPlanetbox reference
star = GQ+Lup
planet = b
simbad = NAME+GQ+Lup+b

GQ Lupi b is a possible extrasolar planet orbiting the star GQ Lupi. Its discovery was announced in April 2005. Along with 2M1207b, this was one of the first extrasolar planet candidates to be directly imaged. The image was made with the VLT telescope at Paranal Observatory, Chile on June 25, 2004. [http://www.eso.org/public/outreach/press-rel/pr-2005/pr-09-05.html Is this a Brown Dwarf or an Exoplanet? New Young Sub-stellar Companion Imaged with the VLT] , ESO Press Release 09/05, April 7, 2005. Accessed on line June 13, 2008.]

GQ Lupi b has a spectral type between M6 and L0, corresponding to a temperature of around 2650 kelvin. Located at a projected distance of about 100 AU from its companion star, giving it an orbital period of perhaps about 1200 years, it is believed to be several times more massive than Jupiter. [ [http://www.extrasolar.net/planettour.asp?StarCatId=&PlanetId=289 GQ Lup b] , "Extrasolar Visions". Accessed on line June 13, 2008.] Because the theoretical models which are used to predict planetary masses for objects in young star systems like GQ Lupi b are still tentative, the mass cannot be precisely specified — models place GQ Lupi b's mass anywhere between a few Jupiter masses and 36 Jupiter masses. At the highest end of this range, GQ Lupi b could be classified as a small brown dwarf rather than an exoplanet. As of 2006, the International Astronomical Union Working Group on Extrasolar Planets described GQ Lupi b as a "possible planetary-mass companion to a young star." [ [http://www.dtm.ciw.edu/boss/planets.html Lists of Extrasolar Planets] , IAU Working Group on Extrasolar Planets, August 28, 2006. Accessed on line June 13, 2008.]

See also

*2M1207b

References

External links

*cite web |url=http://exoplanet.eu/planet.php?p1=GQ+Lup&p2=b |title=GQ Lup b |accessdate=2008-06-09 |work=Extrasolar Planets Encyclopaedia
*cite web |url=http://www.extrasolar.net/planettour.asp?StarCatId=&PlanetId=289 |title=GQ Lupi b |accessdate=2008-06-09 |work=Extrasolar Visions
*cite web |url=http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=GQ+Lup&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2006&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0 |title=V* GQ Lup |accessdate=2008-06-09 |work= SIMBAD
*cite web |url=http://www.newscientist.com/article.ns?id=dn7225 |title=First image of exoplanet orbiting Sun-like star |accessdate=2008-06-09 |work=New Scientist |date=2005-04-04 |first=Kelly |last=Young
*cite web |url=http://news.bbc.co.uk/1/hi/wales/4408187.stm |title=Telescopes see 'distant planet' |accessdate=2008-06-09 |work=BBC News |date=2005-04-04
*cite web |url=http://www.space.com/scienceastronomy/050430_exoplanet_image.html |title=Fresh Debate over First Photo of Extrasolar Planet |accessdate=2008-06-09 |work=SPACE.com |date=2005-04-30 |first=Robert Roy |last=Britt