Lacaille 9352 c
{{Short description|Super-Earth orbiting Lacaille 9352}}
{{Infobox planet
| extrasolarplanet = yes
| name = Lacaille 9352 c
| image =
| image_size =
| image_alt =
| caption =
| apsis = astron
| discoverer = Tuomi et al.
| discovery_site =
| discovered = June 2019
| discovery_method = Radial velocity
| alt_names = Gliese 887 c
| periastron =
| apoastron =
| semimajor = {{val|0.120|0.004}} AU
| avg_speed =
| eccentricity = {{val|0.03|0.21|0.03}}
| period = {{val|21.789|0.004|0.005}} d
| inclination =
| angular_dist =
| long_periastron =
| time_periastron =
| semi-amplitude = {{val|2.8|0.4}}
| star = Lacaille 9352
| mean_radius =
| surface_area =
| volume =
| density =
| mass = ≥{{val|7.6|1.2}} {{Earth mass|link=y}}
| surface_grav =
| moment_of_inertia_factor =
| escape_velocity =
| albedo =
| single_temperature = {{convert|352|K|C F}}
}}
Lacaille 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.{{Cite web|title=The Extrasolar Planet Encyclopaedia — GJ 887 c|url=https://exoplanet.eu/catalog/gj_887_c--7426/|access-date=2020-06-30|work=Extrasolar Planets Encyclopaedia|date=1995 }}
It was detected using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii.
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Characteristics
Lacaille 9352 c is considered a Super-Earth with a minimum mass of 7.6 Earth masses.{{cite web|url=http://www.sci-news.com/astronomy/compact-system-super-earths-lacaille-9352-08577.html|title=Compact System of Super-Earths Found around Lacaille 9352|website=Sci News|last1=Prostak|first1=Sergio|date=June 26, 2020|accessdate=June 30, 2020}}
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).{{Cite web|last=Carter|first=Jamie|title=Planets Found Around 'Best Star By Far' Just 11 Light-Years Away|url=https://www.forbes.com/sites/jamiecartereurope/2020/06/25/meet-gj-887-the-12th-closest-and-best-star-by-far-for-nasas-10-billion-planet-hunter-to-target/|access-date=2020-06-30|website=Forbes|language=en}}
The exoplanet has a calculated equilibrium temperature of {{convert|352|K|C F}}.
Host star
{{main|Lacaille 9352}}
The planet orbits the red dwarf star Lacaille 9352, which has an age of 4.57 billion years.{{cite journal |bibcode=2017ApJ...836...77Y |title=Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library |journal=The Astrophysical Journal |volume=836 |issue=1 |pages=77 |last1=Yee |first1=Samuel W. |last2=Petigura |first2=Erik A. |last3=von Braun |first3=Kaspar |year=2017 |arxiv=1701.00922 |doi=10.3847/1538-4357/836/1/77 |doi-access=free }}
References
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Category:Exoplanets discovered in 2019
Category:Exoplanets detected by radial velocity
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