VHS 1256-1257

VHS 1256-1257  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Corvus
Right ascension |  12h 56m 02.0s
Declination | −12° 57′ 24″
Apparent magnitude (V) | 17.759 ± 0.059
Characteristics
Spectral type | M7.5 ± 0.5[citation needed]
Astrometry
Radial velocity (Rv)| -1.4 ± 4.5 km/s
Proper motion (μ)|  RA: -281.5 ± 5.3 mas/yr
Dec.: -205.5 ± 15.2 mas/yr
Parallax (π)| 78.79 ± 6.4[1] mas
Distance| 41 ± 3 ly
(13 ± 1 pc)
Details
Mass| 0.07 ± 0.015[citation needed] M☉
Luminosity| -3.14 ± 0.1[clarification needed] L☉
Surface gravity (log g)| 5.05 ± 0.1 cm/s[citation needed] cgs
Temperature| 2,620 ± 140[citation needed] K
Age| 225 ± 75[citation needed] Myr
Other designations

VHS J125601.92-125723.9, WISE J125601.94-125723.7, 2MASS J12560215-1257217

VHS J125601.92-125723.9 (abbreviated as VHS 1256-1257 or HSV 1 256) is a red dwarf of spectral type M7.5 located approximately 13 parsecs from the sun, which was discovered by a team led by the Polish astronomer Bartosz Gauza. It is the central object of a planetary system with one known confirmed planet, VHS 1256-1257 b.[2]

## VHS 1256-1257 b

The red dwarf's only discovered companion planet was first identified and documented by the 2MASS survey in 2015. It orbits at a distance of 102 ± 9 AU and has an estimated mass of approximately 11 times Jupiter's,[1] which is below the minimum mass required for the thermonuclear fusion of deuterium.

## References

1. ↑ 1.0 1.1 Gauza, Bartosz; Béjar, Victor J. S.; Pérez-Garrido, Antonio; Maria Rosa Zapatero Osorio; Lodieu, Nicolas; Rebolo, Rafael; Pallé, Enric; Nowak, Grzegorz (2015). "Discovery of a young planetary mass companion to the nearby M dwarf VHS J125601.92-125723.9". The Astrophysical Journal 804 (2): 96. doi:10.1088/0004-637X/804/2/96. Bibcode: 2015ApJ...804...96G.
2. ↑ "Planet VHS 1256-1257 b". http://exoplanet.eu/catalog/vhs_1256-1257_b/.

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*[RA:]: Right Ascension
*[Dec.:]: Declination