astro.wikisort.org - MeteoriteLacaille 9352 c or GJ 887 c is an exoplanet announced in 2020 and located 10.74 light years away, in the constellation of Piscis Austrinus.[3]
Super-Earth orbiting Lacaille 9352
Lacaille 9352 c|
Discovered by | Tuomi et al. |
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Discovery date | June 2019 |
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Detection method | Radial velocity |
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Alternative names | Gliese 887 c |
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Semi-major axis | 0.120±0.004 AU[2] |
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Eccentricity | 0.03+0.21 −0.03[1] |
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Orbital period (sidereal) | 21.789+0.004 −0.005 d[2] |
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Semi-amplitude | 2.8±0.4[2] |
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Star | Lacaille 9352 |
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Mass | ≥7.6±1.2 MEarth[2] |
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Temperature | 352 K (79 °C; 174 °F)[2] |
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It was detected using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii.[2]
Characteristics
The planet orbits the red dwarf star Lacaille 9352, which has an age of 4.57 billion years.[4]
Lacaille 9352 c is considered a Super-Earth with a minimum mass of 7.6 Earth masses.[5]
Habitability
With an orbital period of 21.8 days, the exoplanet is located at 0.12 AU from the star, which is close to the inner edge of the habitable zone (but still outside).[6]
Lacaille 9352 c could be considered potentially habitable within the optimistic sample (between 5 and 10 earth masses).[citation needed]
The exoplanet has a calculated equilibrium temperature of 352 K (79 °C; 174 °F).[2]
References
- Tuomi, M.; et al. (11 June 2019). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644 [astro-ph.EP].
- Jeffers, S. V.; Dreizler, S.; Barnes, J. R.; Haswell, C. A.; Nelson, R. P.; Rodríguez, E.; López-González, M. J.; Morales, N.; Luque, R.; et al. (2020), "A multiple planet system of super-Earths orbiting the brightest red dwarf star GJ887", Science, 368 (6498): 1477–1481, arXiv:2006.16372, Bibcode:2020Sci...368.1477J, doi:10.1126/science.aaz0795, PMID 32587019, S2CID 220075207
- "The Extrasolar Planet Encyclopaedia — GJ 887 c". exoplanet.eu. Retrieved 2020-06-30.
- Yee, Samuel W.; Petigura, Erik A.; von Braun, Kaspar (2017). "Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library". The Astrophysical Journal. 836 (1): 77. arXiv:1701.00922. Bibcode:2017ApJ...836...77Y. doi:10.3847/1538-4357/836/1/77.
- Prostak, Sergio (June 26, 2020). "Compact System of Super-Earths Found around Lacaille 9352". Sci News. Retrieved June 30, 2020.
- Carter, Jamie. "Planets Found Around 'Best Star By Far' Just 11 Light-Years Away". Forbes. Retrieved 2020-06-30.
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