Astronomers identify 10,000 exoplanet candidates

Joshua T. Roth and collaborators reported on April 20 that a new search of NASA’s Transiting Exoplanet Survey Satellite, or TESS, data identified 10,091 new exoplanet candidates. The paper, accepted for publication in *The Astrophysical Journal Supplement*, said the team searched TESS Cycle 1 full-frame images and found 11,554 planet candidates in total, including 1,052 previously known TESS candidates and 411 single-transit events. (arxiv.org) NASA’s Exoplanet Archive listed 6,286 confirmed exoplanets as of May 7, underscoring how large the new candidate set is relative to the confirmed census. Eos, which reported on the work on May 13, said the new batch exceeds the number found across NASA’s Kepler and K2 missions. (exoplanetarchive.ipac.caltech.edu) ### Where did the 10,000 candidates come from? The T16 project used TESS Cycle 1 full-frame image light curves to search stars down to 16th magnitude in the TESS band, according to the paper. Roth and co-authors said that produced a uniformly detrended and systematics-corrected set of 83,717,159 light curves, allowing the team to search beyond the stars usually emphasized by official TESS pipelines. NASA launched TESS on April 18, 2018, and the mission remains in extended operations. NASA says TESS surveys the sky for exoplanets by tracking changes in starlight brightness, and by September 2025 the mission had mapped nearly 6,000 locations of confirmed or candidate exoplanets in a mission sky view. (arxiv.org) ### Why is this batch bigger than earlier TESS candidate lists? The paper said most existing TESS planet searches focus on relatively bright targets, while the T16 analysis pushed to fainter stars. Eos reported that the method let the team search stars up to 16 times fainter than TESS typically searches, widening the field of possible detections. (arxiv.org) The result was a candidate list with orbital periods between 0.5 and 27 days, according to the paper. Eos said those short periods mean the newly flagged worlds are likely to orbit close to their host stars, and many are therefore unlikely to be habitable. (science.nasa.gov) ### Are these planets confirmed yet? The 10,091 objects are candidates, not confirmed planets. The paper said 411 of the detections were single-transit events for which the team did not determine orbital parameters, and Eos reported that the remaining 10,090 newly identified candidates still require additional verification. (arxiv.org) MIT’s TESS Exoplanet Vetter site says the official TESS Objects of Interest catalog is a “living document” that changes as new data and follow-up observations come in. The site says objects can be labeled as planet candidates, confirmed planets, known planets, false positives or false alarms as vetting proceeds. (arxiv.org) ### Did the team confirm anything in the paper? The paper said the researchers used Magellan/PFS radial-velocity measurements to confirm one signal, around TIC 183374187, as a newly identified hot Jupiter. Roth and co-authors said that detection showed the pipeline could recover real, previously undiscovered transiting planets. (arxiv.org) Eos described the planet as hot and slightly larger than Jupiter. NASA’s Exoplanet Archive said TESS had 892 confirmed planets and 7,931 TESS project candidates as of May 1-7. Against that baseline, the T16 paper’s authors said their findings more than double the number of known TESS exoplanet candidates. (tess.mit.edu) ### What happens to the list now? The TESS Exoplanet Vetter site says candidate signals are reviewed by the TESS Science Office and then prepared for follow-up through the TESS Follow-up Observing Program if they are deemed suitable. The NASA Exoplanet Archive also serves as the public record for confirmed planets, project candidates and related updates. (arxiv.org) As of May 14, 2026, the next step is not another headline number but a long sorting process. The 10,091 new candidates reported in the April 20 paper will move through catalog vetting, archive updates and telescope follow-up, while TIC 183374187 stands as the paper’s one newly confirmed planet from the batch. (exoplanetarchive.ipac.caltech.edu) (arxiv.org) (tess.mit.edu)