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]

TOI-813
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]
Distance858 ± 3 ly
(262.9 ± 1.0 pc)
Details[3]
Mass1.32±0.06 M
Radius1.94±0.10 R
Surface gravity (log g)3.86±0.14 cgs
Temperature5907±150 K
Metallicity [Fe/H]0.10±0.10 dex
Rotational velocity (v sin i)8.2±0.9 km/s
Age3.73±0.62 Gyr
Other designations
CD−61 970, CPD−61 371, PPM 354364, TOI-813, TIC 55525572, TYC 8876-1059-1, 2MASS J04504658-6054196[4]
Database references
SIMBADdata

Planetary system

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The star has one known exoplanet orbiting it named TOI-813 b, a Neptune-like gas giant.[7]

The TOI-813 planetary system[3]
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

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  1. ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. ^ 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.
  3. ^ 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.
  4. ^ "CD-61 970". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 November 2023.
  5. ^ "TOI-813 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2023-11-01.
  6. ^ 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.
  7. ^ a b "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2023-11-01.