HIP 70849

HIP 70849 is a 10th magnitude K-type main sequence star located approximately 78 light years away in the constellation Lupus. This star, which resembles a brighter red dwarf, is smaller, cooler, dimmer, and less massive than our Sun. In 2009, a gas giant planet/brown dwarf was found in orbit around it.

HIP 70849
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lupus
Right ascension 14h 29m 18.563s[1]
Declination −46° 27′ 49.74″[1]
Apparent magnitude (V) 10.4
Characteristics
Spectral type K7V
Apparent magnitude (B) 11.6
Apparent magnitude (J) 7.639
Apparent magnitude (H) 7.006
Apparent magnitude (K) 6.790
B−V color index 1.2
Astrometry
Proper motion (μ) RA: −47.12 ± 2.15[1] mas/yr
Dec.: −203.52 ± 1.93[1] mas/yr
Parallax (π)42.42 ± 2.09[1] mas
Distance77 ± 4 ly
(24 ± 1 pc)
Absolute magnitude (MV)8.5
Details
Mass0.62 M☉
Radius0.67 ± 0.04 R☉
Luminosity0.097 ± 0.012 L☉
Surface gravity (log g)4.34 cgs
Temperature3950 ± 100 K
Other designations
CD−45°9206, Gliese 550.3, LTT 5717, NLTT 37446, NSV 6678, PPM 760399
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

There is also a potential T4.5 brown dwarf companion orbiting ~9000AU from HIP 70849.[2]

Planetary system

HIP 70849 b is an extrasolar planet orbiting the star. It has more than five times the mass of Jupiter and takes more than 3000 days to orbit at a semimajor axis of more than 3.5 AU.[3]

The HIP 70849 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >5 MJ >3.5 >3000 ? — —

See also
  • List of extrasolar planets

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.Vizier catalog entry
  2. Lodieu, N.; et al. (2014). "Binary frequency of planet-host stars at wide separations. A new brown dwarf companion to a planet-host star". Astronomy and Astrophysics. 569. A120. arXiv:1408.1208. Bibcode:2014A&A...569A.120L. doi:10.1051/0004-6361/201424210. S2CID 118516214.
  3. 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. arXiv:1107.0339. Bibcode:2011A&A...535A..54S. doi:10.1051/0004-6361/200913580. S2CID 119197766.


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