HD 141937
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Libra[1] |
| Right ascension | 15h 52m 17.54740s[2] |
| Declination | −18° 26′ 09.8432″[2] |
| Apparent magnitude (V) | 7.25[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G1V[3] |
| B−V color index | +0.628±0.002[1] |
| Astrometry | |
| Radial velocity (Rv) | −3.36±0.14[2] km/s |
| Proper motion (μ) | RA: +97.862 mas/yr[2] Dec.: +22.363 mas/yr[2] |
| Parallax (π) | 30.5637±0.0898 mas[2] |
| Distance | 106.7 ± 0.3 ly (32.72 ± 0.10 pc) |
| Absolute magnitude (MV) | 4.71[1] |
| Details | |
| Mass | 1.03[4] M☉ |
| Radius | 1.05[5] R☉ |
| Luminosity | 1.202±0.003[5] L☉ |
| Surface gravity (log g) | 4.44[4] cgs |
| Temperature | 5,890+15 −30[5] K |
| Metallicity [Fe/H] | +0.10±0.01[1] dex |
| Rotational velocity (v sin i) | 6.0[1] km/s |
| Age | 3.82[4] Gyr |
| Other designations | |
| BD−17°4442, HD 141937, HIP 77740, SAO 159551[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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,[1] which means it is too faint to be seen with the naked eye. This object is located at a distance of 106.7 light-years from the Sun based on parallax, but is drifting closer with a radial velocity of −3.4 km/s.[2] It has an absolute magnitude of 4.71.[1]
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.[7] The star is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,890 K.[5]
The star has a substellar companion (HD 141937 b), either a planet or a brown dwarf, announced in April 2001 by the European Southern Observatory.[8] It has a minimum mass of 9.7 MJ.[9] In 2020, the inclination of the orbit was measured via astrometry, indicating a true mass of 27.4 MJ, which would make it a brown dwarf.[10] However, a more recent astrometric study in 2026 found an edge-on orbit, indicating a planetary mass.[11] A 662-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 0.46.[11]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 11.3±0.5 MJ | 1.54±0.02 | 662.37±0.09 | 0.460±0.004 | 90.00+6.75 −6.76° |
— |
See also
References
- ^ a b c d e f g h Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
- ^ a b c d Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 19. arXiv:1611.02897. Bibcode:2017AJ....153...21L. doi:10.3847/1538-3881/153/1/21. S2CID 119511744. 21.
- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ "HD 117207". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-23.
- ^ Delgado Mena, E.; et al. (February 2014). "Li depletion in solar analogues with exoplanets. Extending the sample". Astronomy & Astrophysics. 562: 17. arXiv:1311.6414. Bibcode:2014A&A...562A..92D. doi:10.1051/0004-6361/201321493. S2CID 56104807. A92.
- ^ "Exoplanets: The Hunt Continues!" (Press release). Garching, Germany: European Southern Observatory. April 4, 2001. Retrieved December 29, 2012.
- ^ Udry, S.; et al. (2002). "The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD141937, HD162020, HD168443, HD202206: brown dwarfs or superplanets?". Astronomy and Astrophysics. 390 (1): 267–279. arXiv:astro-ph/0202458. Bibcode:2002A&A...390..267U. doi:10.1051/0004-6361:20020685. S2CID 9389274.
- ^ Kiefer, F.; et al. (January 2021). "Determining the true mass of radial-velocity exoplanets with Gaia. Nine planet candidates in the brown dwarf or stellar regime and 27 confirmed planets". Astronomy & Astrophysics. 645 A7. arXiv:2009.14164. Bibcode:2021A&A...645A...7K. doi:10.1051/0004-6361/202039168. S2CID 221995447.
- ^ a b c Piccinini, G.; Petralia, A.; et al. (January 2026). "True Masses using RV data with Hipparcos and Gaia Astrometry". Astronomy & Astrophysics. arXiv:2601.09401.