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The following are lists of extremes among the known
exoplanets. The properties listed here are those for which values are known reliably.
Extremes from Earth's viewpoint [ edit ]
Planetary characteristics [ edit ]
Orbit characteristics [ edit ]
GU Piscium b GU Piscium
Shortest orbital period
Kepler-70 [21 ]
0.24 days (5.8 hours) Star is a
post-red-giant with another close-period planet, Kepler-70c [22 ]
HD 20782 b [23 ]
HD 20782 [23 ] eccentricity of 0.97±0.01
HD 80606 b has an orbital eccentricity of 0.9349,
previously held record [24 ]
Least eccentric orbit
HD 209458 b
HD 209458 eccentricity of 0.001
Largest orbit around a single star
[25 ] [26 ]
HD 106906 b [25 ]
HD 106906 [25 ] ~650 AU
Kepler-70 0.006 AU
Smallest orbit around binary star
Kepler-47AB ≃0.3 AU
Smallest ratio of
semi-major axis of a planet orbit to binary star orbit
Kepler-16AB 3.14 ± 0.01
Largest orbit around binary star
DT Virginis c
DT Virginis 1168 AU
Star system is also known as Ross 458 AB. The planet was eventually confirmed to be below deuterium burning limit but its formation origin is unknown.
Largest orbit around a single star in a multiple star system
Fomalhaut 115 AU
The second stellar component of the system,
TW Piscis Austrini, has a semi-major axis of 57,000 AU from Fomalhaut and the third stellar component, LP 876-10 orbits 158,000 AU away from Fomalhaut.
Largest distance between binary stars with a circumbinary planet
FW Tauri AB b
FW Tau AB ≈11 AU
Closest orbit between stars with a planet orbiting one of the stars
OGLE-2013-BLG-0341LB ~12-17 AU
(10 or 14 AU projected distance) [29 ] OGLE-2013-BLG-0341L b's semi-major axis is 0.7 AU.
Smallest semi-major axis difference between planets
Kepler-70b and Kepler-70c [31 ]
Kepler-70 0.0016 AU (about 240000 km)
During closest approach, Kepler-70c would appear 5 times the size of the Moon in Kepler-70b's sky.
Smallest semi-major axis ratio between planets
Kepler-36b and Kepler-36c
Kepler-36b and c have semi-major axes of 0.1153 AU and 0.1283 AU respectively, c is 11% further from star than b .
Stellar characteristics [ edit ]
System characteristics [ edit ]
System with most (confirmed) planets
HD 10180 9
The planets are HD 10180b, c, ..., h. This system has 2 unconfirmed planets and more data is needed to confirm their existence.
[38 ] [38 ]
System with most stars
PH1b (Kepler 64b) 4
PH1 has a circumbinary orbit.
See also [ edit ]
References [ edit ]
^ a b USA Today, "Smallest, most distant planet outside solar system found", Malcolm Ritter, 25 January 2006 (accessed 5 August 2010)
^ Schneider, J. "Notes for star PA-99-N2". The Extrasolar Planets Encyclopaedia . Retrieved . 2010-08-06
^ Exoplaneten.de, "The Microlensing Event of Q0957+561" (accessed 5 August 2010)
^ Astrophysical Journal, "Microlensing Variability of the Gravitationally Lensed Quasar Q0957+561 A,B", R.E. Schild, June 1996, v.464, p.125, doi: 10.1086/177304 , Bibcode: 1996ApJ...464..125S
^ a b c "Planet Found in Nearest Star System to Earth". European Southern Observatory. 16 October 2012 . Retrieved . 2012-10-17
^ Lee, T. A. (October 1970), "Photometry of high-luminosity M-type stars", Astrophysical Journal 162: 217, Bibcode: 1970ApJ...162..217L, doi: 10.1086/150648
^ "NASA, ESA Telescopes Find Evidence for Asteroid Belt Around Vega" (Press release). Whitney Clavin, NASA. 8 January 2013 . Retrieved . 4 March 2013
^ a b Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, E. L.; Queloz, D.; Mayor, M.; Udry, S. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". . Harvard University arXiv: 1306.3225. Bibcode: 2013A&A...556A.133S. doi: 10.1051/0004-6361/201321871.
^ Staff (8 March 2014). "DENIS-P J082303.1-491201". SIMBAD . Retrieved . 8 March 2014
^ Staff. "DENIS-P J082303.1-491201 b". Caltech . Retrieved . 8 March 2014
^ a b c New Scientist, "Smallest known exoplanet may actually be Earth-mass", Stephen Battersby, 19 January 2009 (accessed 5 August 2010)
^ a b c "Planets Around Pulsars", Alex Wolszczan (accessed 5 August 2010)
^ http://iopscience.iop.org/0067-0049/210/2/20/article; 2.78 ± 3.7 M Earth means 0 to 6 M Earth at 1 sigma
^ a b c d Very Low-Density Planets around Kepler-51 Revealed with Transit Timing Variations and an Anomaly Similar to a Planet-Planet Eclipse Event: Kento Masuda
^ "HEC Top 10 Lists of Exoplanets" . Retrieved . 11 November 2014
^ a b David M. Kipping et al. "Detection of visible light from the darkest world" (PDF). Monthly Notices of the Royal Astronomical Society . Retrieved . 2011-08-12
^ "Notes for star KOI-55". Extrasolar Planets Encyclopedia . Retrieved . 1 January 2012
^ "Notes for Planet KOI-55 c". Extrasolar Planets Encyclopedia . Retrieved . 1 January 2012
^ a b , (accessed 29 May 2014)
^ ScienceDaily, "Students Find Jupiter-Sized Oddball Planet", 22 April 2009 (accessed 5 August 2010)
^ a b c d Chow, Denise (December 6, 2013). "Giant Alien Planet Discovered in Most Distant Orbit Ever Seen". space.com . Retrieved . December 8, 2013
^ Bailey, Vanessa et al. (January 2014). "HD 106906 b: A planetary-mass companion outside a massive debris disk". The Astrophysical Journal Letters 780 (1). arXiv: 1312.1265. Bibcode: 2014ApJ...780L...4B. doi: 10.1088/2041-8205/780/1/L4. L4.
^ OROSZ J.; WELSH W.; CARTER J.; FABRYCKY D.; COCHRAN W. et al. (2012). "Kepler-47: A Transiting Circumbinary Multi-Planet System". Science. v1 337 (6101): 1511–4. arXiv: 1208.5489. Bibcode: 2012Sci...337.1511O. doi: 10.1126/science.1228380. PMID 22933522.
^ Laurance R. Doyle; Joshua A. Carter; Daniel C. Fabrycky; Robert W. Slawson; Steve B. Howell; Joshua N. Winn; Jerome A. Orosz; Andrej Prsa; William F. Welsh et al. (2011). "Kepler-16: A Transiting Circumbinary Planet". v1. arXiv: 1109.3432 [ astro-ph.EP].
^ arxiv.org/pdf/1407.1115v1.pdf; "(these projected separations are good proxies for the semi-major axis (afterupward adjustment by to correct for projection effects)"
^ J. H. Telting, S. Charpinet. "A compact system of small planets around a former red-giant star". Nature . Retrieved . 23 April 2013
^ a b c Schneider, J.. "Notes for planet HD 13189 b". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/planet.php?p1=HD+13189&p2=b. Retrieved 2010-11-28.
^ a b c Schneider, J.. "Notes for planet 2M J044144 b". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/planet.php?p1=2M+J044144&p2=b. Retrieved 2010-11-28.
^ a b c d e The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/catalog/hd_164922_b/. Retrieved 2012-12-19.
External links [ edit ]