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Gliese 876 System

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Exoplanetary Scratchpad

[SysBP Img]

Very nearby quadruple planet system and the first Red Dwarf found to have planets. The innermost planet (d) was the first found rocky planet around a normal star (the first true Super-Earth, at epistellar distances). The outer three planets c (Saturnian), b (Jovian), and e (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 however it is very much colder than Mercury. Gliese 876 e actually receives only slightly more warmth from Gliese 876 than Jupiter does from our Sun. 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

Gliese 876 System Fun Links

System Factoids

  • Sample Factoid
  • Sample Factoid

Gliese 876 Star Factoids

  • Sample Factoid
  • Sample Factoid

Planet b Factoids

  • Sample Factoid
  • Sample Factoid

Map of Gliese 876 System

0.00 AU - Gliese 876
x.xx AU - <periapsis/semi-major-axis/apapsis of sample planet>
x.xx AU - <habitability zone/stability zone/disk feature positions>

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