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Exoplanetary Scratchpad

[SysBP Img]

Ross 780 is also known as Gl 876 and the flare star IL Aquarii. Very nearby quadruple planet system and the first Red Dwarf found to have planets. The innermost planet (d, Hot Superterran, rocky-water) was the first found rocky planet around a normal star (the first true Super-Earth, at epistellar distances). The outer three planets c (Warm Saturnian), b (Warm Jovian), and e (Cold Neptunian) are in 1:2:4 (30d/60d/120d) resonance (the exoplanet resonance and first triple-resonant planets discovered). The outermost planet has a Mercury-like orbit. Planet b is second discovered by ELODIE after 51 Peg b and the second to have its mass exactly measured and the first to have done so by astrometry.

Gliese 876 System Web Pages[]

Gliese 876 System In the News[]

Discovery of Planet b (1998)[]

Discovery of the nearest exoplanet to the Sun
http://aa.springer.de/bibs/8338002/2300l67/small.htm http://www.journals.uchicago.edu/ApJ/journal/issues/ApJL/v505n2/985511/985511.html article http://www.sciencenews.org/pages/sn_arc98/6_27_98/fob3.htm http://www.obs-hp.fr/www/nouvelles/gl876.html

Discovery of Resonant Planet c (2001)[]

A planet in resonance with the earlier detected planet is discovered
http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v556n1/53268/brief/53268.abstract.html http://www.planetary.org/html/news/articlearchive/headlines/2001/2Systems.htm http://nai.arc.nasa.gov/news_stories/news_detail.cfm?article=old/dancegiant.htm http://news.bbc.co.uk/2/hi/science/nature/1111427.stm

3-Body Orbit Solutions (2001-2005)[]

article (2001) article (2001) - mass determination http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v558n1/53820/brief/53820.abstract.html (2001) http://www.aas.org/publications/baas/v35n4/dda2003/36.htm (2003) http://fr.arxiv.org/abs/astro-ph/0407441 (2004)

Evolution and Stability of Resonance Orbits (2001-2005)[]

http://pasj.asj.or.jp/vol53/v53n4/530404/530404-frame.html (2001) http://www.aas.org/publications/baas/v33n3/dda2001/55.htm (2001) http://xxx.lpthe.jussieu.fr/abs/astro-ph/0104432 (2001) http://www.journals.uchicago.edu/ApJ/journal/issues/ApJ/v572n2/55227/brief/55227.abstract.html (2002) http://xxx.lpthe.jussieu.fr/abs/astro-ph/0209176 (2002) article (2002) article (2003) article (2003) http://xxx.lpthe.jussieu.fr/abs/astro-ph/0302352 (2003) http://www.aas.org/publications/baas/v35n4/dda2003/62.htm (2003) http://vo.obspm.fr/exoplanetes/encyclo/papers/austria04.pdf (2003) http://fr.arxiv.org/abs/astro-ph/0404166 (2004) http://www.edpsciences.org/articles/aa/abs/2005/26/aa2656-05/aa2656-05.html (2005)

Astrometric Mass Estimation (2002)[]

Transit Attempts[]

http://www.spaceref.com/news/viewpr.html?pid=4833

Habital Zone Studies (2002-2005)[]

http://xxx.lpthe.jussieu.fr/abs/astro-ph/0211022 (2002)

Planet d Discovered (2005)[]

The smallest exoplanet and the first certain rocky planet is discovered
http://www.astronomy.com/asy/default.aspx?c=a&id=3283
http://www.sciencemag.org/cgi/content/summary/308/5729/1727a http://nsf.gov/news/newsmedia/planet05/ms.pdf http://www.universetoday.com/am/publish/large_rocky_planet.html http://www.sciencenewsdaily.org/story-4634.html http://www.shns.com/shns/g_index2.cfm?action=detail&pk=EDPLANET-06-16-05 http://www.space.com/searchforlife/seti_newplanet_050616.html http://www.astrobio.net/news/modules.php?op=modload&name=News&file=article&sid=1603&mode=thread&order=0&thold=0 http://www.sfgate.com/cgi-bin/article.cgi?file=/c/a/2005/06/14/MNGELD861J1.DTL http://www.newscientist.com/article.ns?id=dn7517 http://www.chron.com/disp/story.mpl/space/3223887.html http://www.washingtonpost.com/wp-dyn/content/article/2005/06/13/AR2005061301469.html http://www.astronomy.com/asy/default.aspx?c=a&id=3283 http://www.csmonitor.com/2005/0614/p03s01-usgn.html http://news.bbc.co.uk/1/hi/sci/tech/4089534.stm http://www.space.com/scienceastronomy/050613_super_earth.html http://www.nsf.gov/news/news_summ.jsp?cntn_id=104243&org=NSF&from=news

Planet d Must be Dense[]

Calculations show that in order to avoid evaporation by its star, planet d must have a density of greater than 3 g cm^-3 and contain a large fraction of massive elements. http://www.aanda.org/index.php?option=com_base_ora&access=standard&Itemid=129&url=articles/aa/abs/2007/03/aa5014-06/aa5014-06.html

Red Dwarf Studies[]

http://xxx.lpthe.jussieu.fr/abs/astro-ph/0204352 (2002) http://fr.arxiv.org/abs/astro-ph/0503260 (2005)

Planet d Studies[]

http://fr.arxiv.org/abs/astro-ph/0508305 (2005)

Internal Conditions of Planet d Modelled (2006)[]

http://www.ur.umn.edu/FMPro?-db=releases&-lay=web&-format=umnnewsreleases/releasesdetail.html&-RecID=35401&-Find
http://sample_url.com

Planets Coplanar (2008)[]

http://www.skyandtelescope.com/news/37338479.html

Planet e discovered, resonates with a and b (2010)[]

http://news.sciencemag.org/sciencenow/2010/07/scienceshot-planets-sing-in-thre.html

See Also[]

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