TOI 1338
TOI 1338 is a binary star system located in the constellation Pictor, about 1,300 light-years from Earth. It was discovered by TESS and is orbited by a circumbinary planet known as TOI 1338 b.[1][2] The two stars with masses of about 1.2 and 0.325 M☉ revolve around each other every 14.6 days.[3]
![]() Position of TOI 1338 in Pictor | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pictor |
Right ascension | 06h 08m 31.94s.[1] |
Declination | −59° 32′ 27.55″.[1] |
Apparent magnitude (V) | 11.975±0.025 |
Characteristics | |
Astrometry | |
Radial velocity (Rv) | 24.68±8.08[2] km/s |
Proper motion (μ) | RA: -12.258±0.037[2] mas/yr Dec.: 34.405±0.041[2] mas/yr |
Parallax (π) | 2.4774 ± 0.0196[2] mas |
Distance | 1,320 ± 10 ly (404 ± 3 pc) |
Details | |
TOI 1338 A | |
Mass | 1.20[3] M☉ |
TOI 1338 B | |
Mass | 0.3250[3] M☉ |
Other designations | |
TYC 8533-950-1, EBLM J0608-59, 2MASS J06083197-5932280, RAVE J060832.0-593228 | |
Database references | |
SIMBAD | data |
Extrasolar Planets Encyclopaedia | data |
Nomenclature and history
The acronym "TOI" refers to stars and exoplanets studied by TESS, and is short for: "Transiting Exoplanet Survey Satellite Object of Interest". The planet was found by a high school student, who joined the Goddard Space Flight Center as a summer intern. He looked through light curves that were flagged as eclipsing binaries by volunteers of the Planet Hunters citizen science project.[4]
Planetary system
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥ 6.9 M⊕ | — | 94 | — | — | — |
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References
- "ExoFOP TIC 260128333". exofop.ipac.caltech.edu. Retrieved 9 January 2020.
- Gaia Collaboration (1 August 2018). "Gaia Data Release 2 - Summary of the contents and survey properties". Astronomy & Astrophysics. 616: A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. ISSN 0004-6361.
- Martin, David V.; Triaud, Amaury H. M. J.; Udry, Stephane; Marmier, Maxime; Maxted, Pierre F. L.; Cameron, Andrew Collier; Hellier, Coel; Pepe, Francesco; Pollacco, Don; Segransan, Damien; West, Richard (April 2019). "The BEBOP radial-velocity survey for circumbinary planets I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets". Astronomy & Astrophysics. 624: A68. arXiv:1901.01627. Bibcode:2019A&A...624A..68M. doi:10.1051/0004-6361/201833669. ISSN 0004-6361.
- "Discovery Alert! High School Student Finds a World With Two Suns". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 14 February 2020.
- Reddy, Francis (6 January 2020). "TESS Discovers Its 1st Planet Orbiting 2 Stars". NASA.
External link
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