TOI-813 (also known as TIC 55525572[5] and 2MASS J04504658-6054196) is a bright subgiant G-type star[6] located 858 light-years (263 parsecs) away from planet Earth. It is too faint to be seen with the naked eye. TOI-813 has a mass of 1.32 solar masses, a radius of 1.95 solar radii and a luminosity of 4.3 times the solar luminosity.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Dorado[1] |
| Right ascension | 04h 50m 46.57013s[2] |
| Declination | −60° 54′ 19.6171″[2] |
| Apparent magnitude (V) | 10.322[3] |
| Characteristics | |
| Evolutionary stage | Subgiant |
| Spectral type | G0IV[3] |
| Astrometry | |
| Radial velocity (Rv) | 1.24±0.30[2] km/s |
| Proper motion (μ) | RA: -3.605 mas/yr[2] Dec.: -2.699 mas/yr[2] |
| Parallax (π) | 3.8031 ± 0.0141 mas[2] |
| Distance | 858 ± 3 ly (262.9 ± 1.0 pc) |
| Details[3] | |
| Mass | 1.32±0.06 M☉ |
| Radius | 1.94±0.10 R☉ |
| Surface gravity (log g) | 3.86±0.14 cgs |
| Temperature | 5907±150 K |
| Metallicity [Fe/H] | 0.10±0.10 dex |
| Rotational velocity (v sin i) | 8.2±0.9 km/s |
| Age | 3.73±0.62 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
editThe star has one known exoplanet orbiting it named TOI-813 b, a Neptune-like gas giant.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | — | 0.423+0.031 −0.037 |
83.8911+0.0027 −0.0031 |
0 | 89.64+0.24 −0.27° |
6.71±0.38 R🜨 |
References
edit- ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- ^ 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.
- ^ a b c d Eisner, N. L.; Barragán, O.; et al. (May 2020). "Planet Hunters TESS I: TOI 813, a subgiant hosting a transiting Saturn-sized planet on an 84-day orbit". Monthly Notices of the Royal Astronomical Society. 494 (1): 750–763. arXiv:1909.09094. Bibcode:2020MNRAS.494..750E. doi:10.1093/mnras/staa138.
- ^ "CD-61 970". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 November 2023.
- ^ "TOI-813 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2023-11-01.
- ^ Anderson, Natali (2019-12-09). "TOI 813b: Saturn-Sized Exoplanet Found Orbiting Subgiant Star | Astronomy | Sci-News.com". Sci.News: Breaking Science News. Retrieved 2023-11-01.
- ^ a b "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2023-11-01.