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The following are
lists of extremes among the known . The properties listed here are those for which values are known reliably. exoplanets
Extremes from Earth's viewpoint [ edit ]
Planetary characteristics [ edit ]
Orbit characteristics [ edit ]
JMASS J2126-8140 TYC 9486-927-1
Shortest orbital period
Kepler-70 [25 ]
0.24 days (5.8 hours) Star is a
post-red-giant with another close-period planet, Kepler-70c. [26 ]
HD 20782 b [27 ]
HD 20782 [27 ] eccentricity of 0.97±0.01
HD 80606 b has an orbital eccentricity of 0.9349,
previously held record [28 ]
Least eccentric orbit
HD 209458 b
HD 209458 eccentricity of 0.001
Largest orbit around a single star
[29 ] [30 ]
HD 106906 b [29 ]
HD 106906 [29 ] ~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) [33 ] 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 [35 ]
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.
[46 ] [47 ]
System with most stars
PH1b (Kepler 64b) 4
PH1 has a circumbinary orbit.
See also [ edit ]
^ NASA does not give a direct density value, however both mass and radius values are given. Using the PHL density Calculator the mass value of 445 M e and 2.5 R e were used and gave a result of 157.1 g/cm 3 which was far higher than PSR J1719-1438 b's densities. However, since both these values are very much upper bound and the actual mass is likely dramatically lower, the density could be much lower or higher, as the mass is an absolute upper bound. [18 ]
^ NASA does not give a direct density value, however both mass and radius values are given. Using the PHL density Calculator mass value of 0-30 M e and 6.204 R e were used and gave a result of 0-0.7 g/cm which may or may not be lower than Kepler-51d's density depending on the radius of Kepler-52d and the mass of Kepler-453b. The volume of Kepler-51d may be an order of magnitude smaller, or somewhat larger, than that of Jupiter, with possible densities between 10 and about 500 grams per liter. [21 ]
References [ edit ]
^ "PIA19832: Location of Nearest Rocky Exoplanet Known". . 30 July 2015 NASA . Retrieved . 30 July 2015
^ a b Chou, Felicia; Clavin, Whitney (30 July 2015). "NASA's Spitzer Confirms Closest Rocky Exoplanet". NASA . Retrieved . 31 July 2015
^ 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
^ 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
^ "GU Psc b". The Extrasolar Planet Encyclopaedia.
^ 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)
^ [NULL]. "Kepler: Discovery: Kepler-37b, a planet only slightly larger than the Moon". nasa.gov.
^ 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
^ "HAT-P-32 b". The Extrasolar Planet Encyclopaedia.
^ HEC, Calculator (22 October 2015). "Exoplanet Calculator". PHL . Retrieved . 22 Oct 2015
^ "K2-22 b CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive . Retrieved . 2015-10-14
^ "Kepler-453 b". caltech.edu.
^ HEC, Calculator (8 October 2015). "Exoplanet Calculator". PHL . Retrieved . 8 Oct 2015
^ "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 doi: 10.1111/j.1745-3933.2011.01127.x . 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 337 (6101): 1511–4. 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". arXiv: 1109.3432v1 [ 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)"
^ A. Gould. "A terrestrial planet in a ~1-AU orbit around one member of a ∼15-AU binary". sciencemag.org.
^ 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 "Notes for planet HD 13189 b". The Extrasolar Planets Encyclopaedia . Retrieved . 2015-09-15
^ "Notes for planet eps Tau b". The Extrasolar Planets Encyclopaedia . Retrieved . 2015-09-15
^ a b c Schneider, J. "Notes for planet 2M J044144 b". The Extrasolar Planets Encyclopaedia . Retrieved . 2010-11-28
^ "HD 208527 b". The Extrasolar Planet Encyclopaedia.
^ "Kepler-42 b". The Extrasolar Planet Encyclopaedia.
^ "The Extrasolar Planet Encyclopaedia — 2M 0746+20 b". exoplanet.eu.
^ "PSR J1719-1438 b". caltech.edu.
^ a b "HD 164922 b". The Extrasolar Planets Encyclopaedia . Retrieved . 2012-12-19
^ Joe Bauwens. "Sciency Thoughts: Planets in the NY Virginis system.". sciencythoughts.blogspot.com.
^ "Formalhaut b". The Extrasolar Planets Encyclopaedia . Retrieved . 2013-03-30
^ "HD 10180 i". The Extrasolar Planets Encyclopaedia . Retrieved . 2012-12-24
^ "HD 10180 j". The Extrasolar Planets Encyclopaedia . Retrieved . 2012-12-24
External links [ edit ]