HD 42936

HD 42936

Location of HD 42936 in the night sky. The star is marked within the red diamond.
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Mensa
Right ascension	06h 06m 29.8496258601s[1]
Declination	−72° 30′ 45.554148585″[1]
Apparent magnitude (V)	9.09[1]
Characteristics
HD 42936A
Evolutionary stage	main sequence star
Spectral type	K0IV/V[1]
B−V color index	0.91[1]
HD 42936B
Evolutionary stage	main sequence star
Spectral type	L[2]
Astrometry
Radial velocity (Rv)	+34.08 ± 0.77[1] km/s
Proper motion (μ)	RA: -1.412 [1] mas/yr Dec.: -383.637 [1] mas/yr
Parallax (π)	21.2977 ± 0.1032[1] mas
Distance	153.1 ± 0.7 ly (47.0 ± 0.2 pc)
Absolute magnitude (MV)	5.73
Details
HD 42936A
Mass	0.87 M☉
Radius	0.91 R☉
Luminosity (visual, LV)	0.43 L☉
Surface gravity (log g)	4.3 cgs
Temperature	5138 K
Metallicity [Fe/H]	0.18 dex
Age	10.9 Gyr
HD 42936B
Mass	79.9 MJup
Age	10.9 Gyr
Other designations
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets Encyclopaedia	data

HD 42936 is a binary star composed of an orange (K-type) main-sequence star and an L-type dwarf star just massive enough to burn hydrogen, located approximately 153 light-years away in the constellation of Mensa, taking its primary name from its Henry Draper Catalogue designation.

History and nomenclature[]

The designation HD 42936 is from the Henry Draper Catalogue, which is based on spectral classifications made between 1911 and 1915 by Annie Jump Cannon and her co-workers, and was published between 1918 and 1924.

Characteristics[]

As a primary component of HD 42936 is K-type star, HD 42936 emits orange-tinted light.

Planetary system[]

In 2019, an analysis carried out by a team of astronomers led by astronomer John R. Barnes of the (DMPP) confirmed the existence of a super-Earth^[3] in orbit around HD 42936 A (DMPP-3).