HD 141937
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, 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, but is drifting closer with a radial velocity of −2.2 km/s. It has an absolute magnitude of 4.71.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Libra |
| Right ascension | 15h 52m 17.54814s |
| Declination | −18° 26′ 09.7939″ |
| Apparent magnitude (V) | 7.25 |
| Characteristics | |
| Spectral type | G1V |
| B−V color index | +0.628±0.002 |
| Astrometry | |
| Radial velocity (Rv) | −2.20±0.68 km/s |
| Proper motion (μ) | RA: +97.231±0.133 mas/yr Dec.: +19.113±0.116 mas/yr |
| Parallax (π) | 29.9453 ± 0.0640 mas |
| Distance | 108.9 ± 0.2 ly (33.39 ± 0.07 pc) |
| Absolute magnitude (MV) | 4.71 |
| Details | |
| Mass | 1.03 M☉ |
| Radius | 1.05 R☉ |
| Luminosity | 1.202±0.003 L☉ |
| Surface gravity (log g) | 4.44 cgs |
| Temperature | 5,890+15 −30 K |
| Metallicity [Fe/H] | +0.10±0.01 dex |
| Rotational velocity (v sin i) | 6.0 km/s |
| Age | 3.82 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a G-type main-sequence star with a stellar classification of G1V. 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 billion years old and is spinning with a projected rotational velocity of 6 km/s. The star is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,890 K.
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%.
| 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° |
— |