HIP 70849 b

Short description: Extrasolar planet in the constellation Lupus

HIP 70849 bDiscovery

Discovered by| Segransan et al.[1]
Discovery site| La Silla Observatory
Discovery date| October 19, 2009[2]

Detection method

| radial velocity (HARPS)
Orbital characteristics[3]

Semi-major axis

| 3.99+0.06
−0.07 astronomical unit|AU
Eccentricity| 0.65+0.02
−0.01
Orbital period| 3,649 ± 18 days (9.990 ± 0.049 a)
Inclination| 96°±16°
Longitude of ascending node| 35°±6°

astron|astron|helion}}

| 182°±1°
Star| HIP 70849
Physical characteristics[3]
Mass| 4.5+0.4
−0.3 MJ

HIP 70849 b is an extrasolar planet which orbits the K-type main sequence star HIP 70849, located approximately 79 light years away in the constellation Lupus. This planet was detected by HARPS and announced on October 19, 2009, together with 31 other planets.[2] Its parameters were initially poorly constrained, estimated to have a minimum mass of 3-15 |♃|J}}}}}} and take anywhere from 5-90 years to orbit the star at a semimajor axis of 4.5-36 AU, with the eccentricity and inclination being unknown.[1] This was significantly updated in a December 2022 paper, which found much better constrained parameters including a high eccentricity,[4] and in a January 2023 paper which determined the planet's inclination and true mass via astrometry.[3]

## References

1. ↑ 1.0 1.1 Ségransan, D. et al. (2011). "The HARPS search for southern extra-solar planets. XXIX. Four new planets in orbit around the moderately active dwarfs HD 63765, HD 104067, HD 125595, and HIP 70849". Astronomy and Astrophysics 535: A54. doi:10.1051/0004-6361/200913580. Bibcode: 2011A&A...535A..54S. http://www.aanda.org/articles/aa/full_html/2011/11/aa13580-09/aa13580-09.html.
2. ↑ 2.0 2.1 "32 New Exoplanets Found". ESO. 19 October 2009. https://www.eso.org/public/news/eso0939/.
3. ↑ 3.0 3.1 3.2 Philipot, F. et al. (January 2023). "Updated characterization of long-period single companion by combining radial velocity, relative astrometry, and absolute astrometry". Astronomy & Astrophysics 670: A65. doi:10.1051/0004-6361/202245396. Bibcode: 2023A&A...670A..65P.
4. ↑ Šubjak, J. et al. (2023). "Search for planets around stars with wide brown dwarfs". Astronomy & Astrophysics 671: A10. doi:10.1051/0004-6361/202244238. Bibcode: 2023A&A...671A..10S.

Coordinates:  14h 29m 18.5631s, −46° 27′ 49.738″

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