Artist's impression of the planet Ross 128 b, with the star Ross 128 in the background.
Discovery
Discovered by
Xavier Bonfils
Discovery date
November 15, 2017
Detection method
Radial velocity
Orbital characteristics
Apastron
0.0511 (± 0.0031) AU
Periastron
0.0475 (± 0.0031) AU
Semi-major axis
0.0496 (± 0.0017) AU
Eccentricity
0.036 (± 0.092)
Orbital period (sidereal)
9.8658 (± 0.0070) d
Star
Ross 128
Physical characteristics
Mean radius
1.6+1.1 −0.65[1]R🜨
Mass
1.8+0.56 −0.43[1]ME
Temperature
213–301 K (−60–28 °C; −76–82 °F)
Ross 128 b is a confirmed Earth-sized exoplanet, likely rocky, that is orbiting within the inner habitable zone of the red dwarf star Ross 128, at a distance of around 11 light-years from Earth.[2] The exoplanet was found using a decade's worth of radial velocity data using the European Southern Observatory's HARPS spectrograph (High Accuracy Radial velocity Planet Searcher) at the La Silla Observatory in Chile. Ross 128 b is the nearest exoplanet around a quiet red dwarf, and is considered one of the best candidates for habitability. The planet is only 35% more massive than Earth, receives only 38% more starlight, and is expected to be a temperature suitable for liquid water to exist on the surface, if it has an atmosphere.[3]
The planet does not transit its host star, which historically made atmospheric characterization very difficult, but this has become possible with the construction of larger telescopes like the James Webb Space Telescope.[3]
^ abTasker, Elizabeth J.; Laneuville, Matthieu; Guttenberg, Nicholas (7 January 2020). "Estimating Planetary Mass with Deep Learning". The Astronomical Journal. 159 (2): 41. arXiv:1911.11035. Bibcode:2020AJ....159...41T. doi:10.3847/1538-3881/ab5b9e. ISSN 1538-3881. S2CID 208267900.
^Newfound Earth-like exoplanet a good spot to hunt for aliens. Eric Mack, CBS News. 15 November 2017.
^ abBonfils, Xavier (2017). "A temperate exo-Earth around a quiet M dwarf at 3.4 parsecs". Astronomy and Astrophysics. 613: A25. arXiv:1711.06177. Bibcode:2018A&A...613A..25B. doi:10.1051/0004-6361/201731973. S2CID 37148632.
Ross128b is a confirmed Earth-sized exoplanet, likely rocky, that is orbiting within the inner habitable zone of the red dwarf star Ross128, at a distance...
Ross128 is a red dwarf in the equatorial zodiac constellation of Virgo, near β Virginis. The apparent magnitude of Ross128 is 11.13, which is too faint...
light-years. Only Proxima Centauri b, Ross128b, and GJ 1061 d are closer. Discovered alongside Gliese 273c in June 2017, Luyten b is a super-Earth of around...
orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508". Publications of the Astronomical Society of Japan. 74 (4): 904–922...
Luyten b orbits within the habitable zone of Luyten's Star just 12.2 light-years away. At 11 light-years away, the second closest planet, Ross128b, was...
Centauri, the closest star to Earth (not counting the Sun). Called Proxima b, the planet is 1.3 times the mass of Earth and has an orbital period of roughly...
closest known potentially habitable planets to Earth after Proxima b, Ross128b, and Luyten b. The next planet out, Wolf 1061 d, could be marginally habitable...
parent star. Ross128b is a confirmed Earth-sized exoplanet, likely rocky, orbiting within the inner habitable zone of the red dwarf Ross128. It is the...
two confirmed planets orbiting it. The first to be discovered was LHS 1140 b, discovered by the MEarth Project in 2017 using the transit method. Follow-up...
exoplanets from the CoRoT space mission XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b". Astronomy & Astrophysics. 635: A122. March 2020. doi:10.1051/0004-6361/201732393...
d HD 126614 Ab HD 130322 b (Eiger) HR 5183 b K2-229b KELT-21b PSR B1257+12 A (Draugr) B (Poltergeist) C (Phobetor) Ross128b WASP-16b WASP-24b WASP-39b...
ISBN 0-595-33582-9. Ross, Frank E. (February 1926). "New proper-motion stars, (second list)". Astronomical Journal. 36 (856): 124–128. Bibcode:1926AJ.....
d HD 126614 Ab HD 130322 b (Eiger) HR 5183 b K2-229b KELT-21b PSR B1257+12 A (Draugr) B (Poltergeist) C (Phobetor) Ross128b WASP-16b WASP-24b WASP-39b...
of an overall lukewarm critical response. The film ultimately grossed US$128 million worldwide. She and Toni Collette starred in Miss You Already (2015)...
Route 128 station (sometimes titled Route 128/University Park) is a passenger rail station located at the crossing of the Northeast Corridor and Interstate...
Sul Ross State University (SRSU) is a public university in Alpine, Texas. The main campus is the primary institution of higher education serving the nineteen-county...
and B. λ Virginis (Latinised to Lambda Virginis) is the system's Bayer designation. The designations of the two components as Lambda Virginis A and B derives...
Benner (1983), p. 128. Benner (1983), p. 129. Benner (1983), pp. 131–133 Benner (1983), p. 140. Benner (1983), p. 141. "Lawrence Sullivan Ross". Texas Legislators:...
Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M Famaey, B.; et al. (2009), "Spectroscopic binaries among Hipparcos M giants. I. Data...
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