HD 141937

HD 141937
Observation data
Epoch J2000      Equinox J2000
Constellation Libra
Right ascension 15h 52m 17.54814s[1]
Declination −18° 26′ 09.7939″[1]
Apparent magnitude (V) 7.25[2]
Characteristics
Spectral type G1V[3]
B−V color index +0.628±0.002[2]
Astrometry
Radial velocity (Rv)−2.20±0.68[2] km/s
Proper motion (μ) RA: +97.231±0.133[1] mas/yr
Dec.: +19.113±0.116[1] mas/yr
Parallax (π)29.9453 ± 0.0640 mas[1]
Distance108.9 ± 0.2 ly
(33.39 ± 0.07 pc)
Absolute magnitude (MV)4.71[2]
Details
Mass1.03[4] M☉
Radius1.05[1] R☉
Luminosity1.202±0.003[1] L☉
Surface gravity (log g)4.44[4] cgs
Temperature5,890+15
−30[1] K
Metallicity [Fe/H]+0.10±0.01[2] dex
Rotational velocity (v sin i)6.0[2] km/s
Age3.82[4] Gyr
Other designations
BD−17° 4442, HD 141937, HIP 77740, SAO 159551[5]
Database references
SIMBADdata

HD 141937 is a star in the southern zodiac constellation of Libra, positioned a couple of degrees to the north of Lambda Librae. It is a yellow-hued star with an apparent visual magnitude of 7.25,[2] which means it is too faint to be seen with the naked eye. This object is located at a distance of 108.9 light years from the Sun based on parallax,[1] but is drifting closer with a radial velocity of −2.2 km/s.[2] It has an absolute magnitude of 4.71.[2]

This is a G-type main-sequence star with a stellar classification of G1V.[3] It is a solar-type star with slightly higher mass and radius compared to the Sun. The metallicity is higher than solar. It is an estimated 3.8[4] billion years old and is spinning with a projected rotational velocity of 6 km/s.[6] The star is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,890 K.[1]

The star has a substellar companion (HD 141937 b) announced in April 2001 by the European Southern Observatory. It has a minimum mass of 9.7 MJ. In 2020, the inclination of the orbit was measured, revealing its true mass to be 27.4 MJ, which makes it a brown dwarf. A 653-day orbit places the orbital distance 1.5 times farther away from the star as Earth is from the Sun, with a high eccentricity of 41%.[7][8]

The HD 141937 planetary system[9][10][8]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 27.42+6.78
−9.86 MJ 		1.4877±0.0018 653.22±1.21 0.41±0.01 20.52+12.47
−4.16° 		—
  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Mena2014 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference eso0114 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kiefer2020 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Udry2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Liu2014 was invoked but never defined (see the help page).