Lacaille 9352 c

Short description: Super-Earth orbiting Lacaille 9352

Lacaille 9352 cDiscovery[1]

Discovered by| Tuomi et al.
Discovery date| June 2019

Detection method

| Radial velocity
Designations

Alternative names

| Gliese 887 c
Orbital characteristics

Semi-major axis

| 0.120±0.004 AU[2]
Eccentricity| 0.03+0.21
−0.03[1]
Orbital period| 21.789+0.004
−0.005 d[2]
Semi-amplitude| 2.8±0.4[2]
Star| Lacaille 9352
Physical characteristics
Mass| ≥7.6±1.2 M⊕[2]
Physics| 352 K (79 °C; 174 °F)[2]

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.[3]

It was detected using the radial velocity method from observations with HARPS in Chile and HIRES in Hawaii.[2]

## Contents

* 1 Characteristics
* 2 Host star
* 3 References

## Characteristics

Lacaille 9352 c is considered a Super-Earth with a minimum mass of 7.6 Earth masses.[4]

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).[5]

The exoplanet has a calculated equilibrium temperature of 352 K (79 °C; 174 °F).[2]

## Host star

Main page: Astronomy:Lacaille 9352

The planet orbits the red dwarf star Lacaille 9352, which has an age of 4.57 billion years.[6]

## References

1. ↑ 1.0 1.1 "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". 11 June 2019. arXiv:1906.04644 [astro-ph.EP].
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Jeffers, S. V.; Dreizler, S.; Barnes, J. R.; Haswell, C. A.; Nelson, R. P.; Rodríguez, E.; López-González, M. J.; Morales, N. et al. (2020), "A multiple planet system of super-Earths orbiting the brightest red dwarf star GJ887", Science 368 (6498): 1477–1481, doi:10.1126/science.aaz0795, PMID 32587019, Bibcode: 2020Sci...368.1477J
3. ↑ "The Extrasolar Planet Encyclopaedia — GJ 887 c". Extrasolar Planets Encyclopaedia. 1995. https://exoplanet.eu/catalog/gj_887_c--7426/.
4. ↑ Prostak, Sergio (June 26, 2020). "Compact System of Super-Earths Found around Lacaille 9352". http://www.sci-news.com/astronomy/compact-system-super-earths-lacaille-9352-08577.html. Retrieved June 30, 2020.
5. ↑ Carter, Jamie. "Planets Found Around 'Best Star By Far' Just 11 Light-Years Away" (in en). 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/.
6. ↑ 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. doi:10.3847/1538-4357/836/1/77. Bibcode: 2017ApJ...836...77Y.

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