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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Octans[1] |
| Right ascension | 21h 37m 32.864s[2] |
| Declination | −77° 58′ 43.51″[2] |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | M0V |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | −4.43±0.36[2] km/s |
| Proper motion (μ) | RA: 120.333(19) mas/yr[2] Dec.: −91.503(18) mas/yr[2] |
| Parallax (π) | 16.2487 ± 0.0184 mas[2] |
| Distance | 200.7 ± 0.2 ly (61.54 ± 0.07 pc) |
| Details | |
| Mass | 0.6296 ±0.0086 M☉ |
| Radius | 0.599 ±0.013 R☉ |
| Luminosity | −1.13+0.03 −0.03 L☉ |
| Temperature | 3901 ±69 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
TOI-4342 is a red dwarf star in the constellation Octans located 201 light-years from Earth.
Planetary system
[edit]It hosts two planets discovered in 2023.[4][5] They are locked in a near 2:1 orbital resonance.
TOI-4342 b is a Neptune-like body located 0.05251 AU from its star. Its orbital period around the star is 5.5 days. TOI-4342 b has a radius that is 0.202 that of Jupiter and a mass of 5.76 that of Earth. Its discovery in early 2023 was made through the use of a transit detection method of TOI-4342. The transit method was performed by the Transiting Exoplanet Survey Satellite (TESS). TOI-4342 b was the first of two exoplanets found orbiting TOI-4342. The other planet is TOI-4342 c.[4]
TOI-4342 c is a Neptune-like body located 0.0814 AU from its star. Its orbital period around the star is 10.7 days. TOI-4342 c has a radius that is 0.215 that of Jupiter and a mass of 6.41 that of Earth. Its discovery in early 2023 was made through the use of a transit detection method of TOI-4342. The transit method was performed by the Transiting Exoplanet Survey Satellite (TESS). TOI-4342 b was the first of two exoplanets found orbiting TOI-4342. The other planet is TOI-4342 b.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 5.76 M🜨 | 0.05251 | 5.5 | 0 | — | — |
| c | 6.41 M🜨 | 0.0814 | 10.7 | 0 | — | — |
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.
- ^ "TOI-4342". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 September 2023.
- ^ a b "The Extrasolar Planet Encyclopaedia — TOI-4342 b". Extrasolar Planets Encyclopaedia. Retrieved 11 September 2023.
- ^ a b "The Extrasolar Planet Encyclopaedia — TOI-4342 c". Extrasolar Planets Encyclopaedia. Retrieved 11 September 2023.
