HIP 79431

HIP 79431 is an 11th magnitude M-type main sequence star located approximately 47 light years away in the constellation Scorpius. This star is smaller, cooler, dimmer, and less massive than our Sun. Also its metal content is 2.5 times as much as the Sun. In 2010, a superjovian planet was found in orbit around the star. This planet is one of the most massive found around a red dwarf star.

HIP 79431
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 16h 12m 41.77s
Declination −18° 52 31.8
Apparent magnitude (V) 11.337
Characteristics
Spectral type M3V
Apparent magnitude (B) 14.39
Apparent magnitude (R) 10.46
Apparent magnitude (I) 9.37
Apparent magnitude (J) 7.555
Apparent magnitude (H) 6.855
Apparent magnitude (K) 6.589
B−V color index 3.05
V−R color index 0.88
R−I color index 1.09
Variable type none
Astrometry
Proper motion (μ) RA: 24.12 mas/yr
Dec.: −210.89 mas/yr
Parallax (π)69.46 ± 3.12[1] mas
Distance47 ± 2 ly
(14.4 ± 0.6 pc)
Absolute magnitude (MV)10.47
Details
Mass0.49 ± 0.05 M
Temperature3,689 ± 20[2] K
Metallicity [Fe/H]+0.46 ± 0.17[2] dex
Other designations
Sharjah, LP 804-27, NLTT 42226
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata
Extrasolar Planets
Encyclopaedia
data

The star HIP 79431 is named Sharjah. The name was selected in the NameExoWorlds campaign by United Arab Emirates, during the 100th anniversary of the IAU. Sharjah is the cultural capital of United Arab Emirates.[3][4]

The HIP 79431 planetary system[5]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥2.1 MJ 0.36 111.7 ± 0.7 0.29 ± 0.02

See also

References


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