Epoch J2000 Equinox J2000
|Right ascension||06h 08m 31.94s.|
|Declination||−59° 32′ 27.55″.|
|Apparent magnitude (V)||11.975±0.025|
|Radial velocity (Rv)||24.68±8.08 km/s|
|Proper motion (μ)|| RA: -12.258±0.037 mas/yr |
Dec.: 34.405±0.041 mas/yr
|Parallax (π)||2.4774 ± 0.0196 mas|
|Distance||1,320 ± 10 ly |
(404 ± 3 pc)
|TOI 1338 A|
|TOI 1338 B|
TYC 8533-950-1, EBLM J0608-59, 2MASS J06083197-5932280, RAVE J060832.0-593228
TOI 1338 is a binary star system, discovered by TESS, and TESS's first binary system confirmed to contain a planet, called a circumbinary planet. The system is 1,300 light-years away in the constellation Pictor. The two stars with masses of about 1.2 and 0.325 M☉ revolve around each other every 14.6 days.
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.
(in order from star)
|b||≥ 6.9 M⊕||—||94||—||—||—|
The planet TOI 1338 b, announced 6 January 2020, was the first discovered circumbinary planet.
- "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. 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. 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.
- TESS – Official WebSite
- NASA Telescope Discovers Its First Planet Orbiting Two Stars
- TOI 1338 at ExoFOP TESS
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