TOI-763
.png) Location of TOI-763 in the night sky. The general location of the star is marked within the red square. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 57m 52.447s[2] |
| Declination | −39° 45′ 27.71″[2] |
| Apparent magnitude (V) | 10.28[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4][2] |
| Spectral type | G[4] |
| Astrometry | |
| Radial velocity (Rv) | −13.82±0.16[2] km/s |
| Proper motion (μ) | RA: −76.744 mas/yr[2] Dec.: −84.721 mas/yr[2] |
| Parallax (π) | 10.4655±0.0183 mas[2] |
| Distance | 311.6 ± 0.5 ly (95.6 ± 0.2 pc) |
| Details[4] | |
| Mass | 0.917±0.028 M☉ |
| Radius | 0.897±0.013 R☉ |
| Luminosity | 0.68[5] L☉ |
| Surface gravity (log g) | 4.45±0.05 cgs |
| Temperature | 5,450±60 K |
| Metallicity [Fe/H] | +0.01±0.05 dex |
| Rotation | 27±16 days |
| Age | 6.0[6] Gyr |
| Other designations | |
| CD−39 7945, TOI-763, TIC 178819686, 2MASS J12575245-3945275[3] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
TOI-763 is a single high proper motion G-type star in the constellation of Centaurus, near the galaxy NGC 4832 in the sky.[3] It is approximately 0.9 times the mass and radius of the Sun, with a surface temperature of 5,450±60 K and a spectral type of G7.[7] TOI-763 is too faint to be visible to the naked eye. Based upon parallax measurements, it is located 312 light-years (95.6 parsecs) in distance from the Sun. The object is drifting towards the Sun with a radial velocity of −13.8 km/s.[2]
Planetary system
[edit]In August of 2020, two exoplanets were identified via the transit method of exoplanet detection by the Transiting Exoplanet Survey Satellite (TESS), a space telescope for NASA's Explorer program, designed to search for exoplanets. A third candidate planet is suspected based on radial velocity observations.[4]
Neither of these two planets orbit in the habitable zone and are both believed to be sub-Neptune planets.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 9.79±0.78 M🜨 | 0.0600±0.0006 | 5.6057±0.0013 | 0.04+0.04 −0.03 |
— | 2.28±0.11 R🜨 |
| c | 9.32±1.02 M🜨 | 0.1011±0.0010 | 12.2737+0.0053 −0.0077 |
0.04+0.04 −0.03 |
— | 2.63±0.12 R🜨 |
| d (unconfirmed) | ≥9.54±1.59 M🜨 | 0.2504+0.0093 −0.0105 |
47.7991±2.7399 | ~0 | — | — |
See also
[edit]References
[edit]- ^ 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 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 c "CD-39 7945". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-04-25.
- ^ a b c d e Fridlund, M; Livingston, J; Gandolfi, D; Persson, C M; Lam, K W F; Stassun, K G; Hellier, C; Korth, J; Hatzes, A P; Malavolta, L; Luque, R; Redfield, S; Guenther, E W; Albrecht, S; Barragan, O (2020-10-01). "The TOI-763 system: sub-Neptunes orbiting a Sun-like star". Monthly Notices of the Royal Astronomical Society. 498 (3): 4503–4517. arXiv:2008.12535. Bibcode:2020MNRAS.498.4503F. doi:10.1093/mnras/staa2502. ISSN 0035-8711.
- ^ De Laverny, Patrick; Ligi, Roxanne; Crida, Aurélien; Recio-Blanco, Alejandra; Palicio, Pedro A. (2025). "The Gaia spectroscopic catalogue of exoplanets and host stars". Astronomy & Astrophysics. 699: A100. arXiv:2505.22205. Bibcode:2025A&A...699A.100D. doi:10.1051/0004-6361/202554739.
- ^ Leleu, Adrien; Delisle, Jean-Baptiste; Burn, Remo; Izidoro, André; Udry, Stéphane; Dumusque, Xavier; Lovis, Christophe; Millholland, Sarah; Parc, Léna; Bouchy, François; Bourrier, Vincent; Alibert, Yann; Faria, João; Mordasini, Christoph; Ségransan, Damien (2024). "Resonant sub-Neptunes are puffier". Astronomy & Astrophysics. 687: L1. arXiv:2406.18991. Bibcode:2024A&A...687L...1L. doi:10.1051/0004-6361/202450587.
- ^ "TOI-763". www.exoplanetkyoto.org. Retrieved 2025-04-25.
- ^ "TOI-763 c - NASA Science". 2020-09-24. Retrieved 2025-04-25.
