HD 93963
HD 93963 is a binary star in the constellation Leo Minor. At an apparent magnitude of +9.18, it is not visible to the naked eye. Parallax measurements give a distance of 268 light-years (82.3 parsecs) and 273 light-years (83.8 parsecs) for the primary and secondary component, respectively. Interstellar extinction causes the system's magnitude to be reduced by 0.10±0.05 magnitudes.[6]
Characteristics
The primary, HD 93963 A, is main sequence star[6] of class G0V.[6] The star has a mass 1.11 times that of the Sun and a radius 1.043 times solar. It irradiates 25% more luminosity than the Sun and has an effective temperature of 5,987 K,[6] giving it a yellowish-white hue as typical of G-type stars.[8]
The companion, HD 93963 B, is a red dwarf star of class M5V. The star has 0.16 times the mass and 0.20 times the radius of the Sun, with a cool effective temperature of 3,060 K. It has a projected separation of 484 au from the primary.[6]
Planetary system
Two planets have been discovered around the primary star in 2022 with the joint use of transit photometry and radial velocity.[6]
- HD 93963 A b is a super-Earth with an orbital period of 1.04 days. It orbits at a semi-major axis of 0.0209 AU and shows an inclination of 86.21 degrees. The planet has a radius of 1.35±0.042 Earth radii. Its mass estimate sits at 7.8±3.2 Earth masses.[6]
- HD 93963 A c is a sub-Neptune planet that completes an orbit every 3.65 days. Its radius measures 3.228±0.059 Earth radii and its mass measures 19.2±4.1 Earth masses.[6]
References
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e 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.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b c d e 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.
- ^ MacDougall, Mason G.; Petigura, Erik A.; Gilbert, Gregory J.; Angelo, Isabel; Batalha, Natalie M.; Beard, Corey; Behmard, Aida; Blunt, Sarah; Brinkman, Casey; Chontos, Ashley; Crossfield, Ian J. M.; Dai, Fei; Dalba, Paul A.; Dressing, Courtney; Fetherolf, Tara (2023-06-27). "The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars". The Astronomical Journal. 166 (1): 33. doi:10.3847/1538-3881/acd557. ISSN 0004-6256.
- ^ a b c d e f g h i j k l Serrano, L. M.; Gandolfi, D.; Hoyer, S.; Brandeker, A.; Hooton, M. J.; Sousa, S.; Murgas, F.; Ciardi, D. R.; Howell, S. B.; Benz, W.; Billot, N.; Florén, H.-G.; Bekkelien, A.; Bonfanti, A.; Krenn, A. (2022-11-01). "The HD 93963 A transiting system: A 1.04 d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS". Astronomy & Astrophysics. 667: A1. arXiv:2207.13920. doi:10.1051/0004-6361/202243093. ISSN 0004-6361.
- ^ "HD 93963". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. Archived from the original on 2013-12-03. Retrieved 2012-01-16.