Exoplanet candidate in the constellation of Pictor
HD 40307 g
Approximate size comparison of HD 40307 g with Earth.
Discovery
Discovered by
Mikko Tuomi et al.
Discovery site
La Silla Observatory, Chile
Discovery date
October 28, 2012
Detection method
radial velocity, using HARPS
Orbital characteristics
Semi-major axis
0.600 AU (89,800,000 km)
Eccentricity
0.22[1]
Orbital period (sidereal)
197.8 ± 9.0[1] d
Semi-amplitude
0.95 ± 0.3[1]
Star
HD 40307
Physical characteristics
Mean radius
2.39[2]R🜨
Mass
7.09[2]ME
Temperature
277.6[3]
NASA Exoplanet Exploration Program "travel poster" for HD 40307 g
HD 40307 g is an exoplanet candidate suspected to be orbiting in the habitable zone of HD 40307. It is located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the European Southern Observatory's HARPS apparatus[1][4][5] by a team of astronomers led by Mikko Tuomi at the University of Hertfordshire and Guillem Anglada-Escude of the University of Göttingen, Germany.[6]
The existence of the planet was disputed in 2015, as more Doppler spectroscopy data has become available.[7]
^ abcdTuomi, Mikko; Anglada-Escudé, Guillem; Gerlach, Enrico; Jones, Hugh R. A.; Reiners, Ansgar; Rivera, Eugenio J.; Vogt, Steven S.; Butler, R. Paul (17 December 2012). "Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307". Astronomy & Astrophysics. 549: A48. arXiv:1211.1617. Bibcode:2013A&A...549A..48T. doi:10.1051/0004-6361/201220268. S2CID 7424216.
^ ab"PHL's Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". Archived from the original on 2019-05-21. Retrieved 2014-01-09.
^"HEC: Data of Potential Habitable Worlds". University of Puerto Rico at Arecibo (Planetary Habitability Laboratory). November 12, 2012. Archived from the original on December 1, 2017. Retrieved November 16, 2012.
^Wall, Mike (November 7, 2012). "'Super-Earth' Alien Planet May Be Habitable for Life". Space.com. Retrieved November 8, 2012.
^Tate, Karl (November 7, 2012). "Super-Earth Planet: Potentially Habitable Alien World Explained (Infographic)". Space.com. Retrieved November 8, 2012.
^Murrin, Marc (November 8, 2012). "Astronomers discover a potentially habitable Super-Earth HD 40307g (Infographic)". tech-stew.com. Archived from the original on November 10, 2012. Retrieved November 8, 2012.
^Díaz, R. F.; et al. (2016). "The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles". Astronomy and Astrophysics. 585. A134. arXiv:1510.06446. Bibcode:2016A&A...585A.134D. doi:10.1051/0004-6361/201526729. S2CID 118531921.
HD40307 is an orange (K-type) main-sequence star located approximately 42 light-years away in the constellation of Pictor (the Easel), taking its primary...
observed to have planets. Among them is HD40307, an orange dwarf that has six planets orbiting it, one of which—HD40307g—is a potential super-Earth in the...
activity. These include Gliese 581 d & g, Gliese 667 Ce & f, Gliese 682 b & c, Kapteyn b, and Gliese 832 c. HD 85512 b was initially estimated to be potentially...
"Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD40307". Astronomy & Astrophysics. 549: A48. arXiv:1211.1617. Bibcode:2013A&A...
about 60° C. HD40307g, a candidate planet tentatively discovered in November 2012, is in the circumstellar habitable zone of HD40307. In December 2012...
system called "Chu'ot" and their homeworld being called Eayn. HD 169830 HD40307HD 60532 List of extrasolar planets List of star systems within 40–45 light-years...
Astronomers report that HD40307g, a super-Earth exoplanet 42 light-years away from Earth, is within the habitable zone of its host star HD40307 and may be "just...
more data are required to constrain the orbital position of planet d. HD40307HD 47186 MOA-2007-BLG-192L Anderson, E.; Francis, Ch. (2012). "XHIP: An...
"Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD40307", Astronomy & Astrophysics, 549: A48, arXiv:1211.1617, doi:10.1051/0004-6361/201220268...
"Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD40307". Astronomy & Astrophysics. 549: A48. arXiv:1211.1617. Bibcode:2013A&A...
2006-12-26. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 2006-12-26. Roman, N. G. (1987). "Identification of a Constellation...
circular path while the outer planet orbits in an eccentric path. HD 181433 HD40307 MOA-2007-BLG-192L Vallenari, A.; et al. (Gaia collaboration) (2023)...
time a key molecule for organic life was found on an extrasolar planet. HD40307: On June 16, Michel Mayor announced a planetary system with three super-Earths...
Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan...
discoveries from HARPS HARPS spectrograph HARPS spectrograph detail Animation of HD 10180 with its seven planets Similar instruments: HARPS-N is a copy of this...
study Tuomi has contributed include HD40307, HD 154857 c, Kapteyn c, Gliese 682 c, HD 154857, Gliese 221, Gliese 581 g and the planetary system orbiting...
Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Department of Astronomy, University of Michigan...
Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", Astronomy & Astrophysics, 562 (A71):...
Nancy (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Ann Arbor: Dept. Of Astronomy, 2, Ann Arbor: Dept. of Astronomy, University...
Sun, and have an estimated age of around 500–600 million years. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary...
Global Information
