{"id":817677,"date":"2026-10-29T15:16:10","date_gmt":"2026-10-29T15:16:10","guid":{"rendered":"https:\/\/www.newsbeep.com\/uk\/817677\/"},"modified":"2026-10-29T15:16:10","modified_gmt":"2026-10-29T15:16:10","slug":"boffins-software-found-a-possible-dwarf-planet","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/uk\/817677\/","title":{"rendered":"Boffin’s software found a possible dwarf planet"},"content":{"rendered":"

<\/p>\n

\n science\n <\/p>\n

<\/a><\/p>\n

\n 2026 ED138 is way out beyond Neptune and perhaps the smallest known object of its type\n <\/p>\n

A scientist working on data gathered by the Rubin Observatory has found a strong candidate for our solar system\u2019s sixth known dwarf planet.<\/p>\n

The Observatory is run by the USA\u2019s National Science Foundation and Department of Energy, who built it on a remote hilltop in Chile and equipped it with the 3200-megapixel Legacy Survey of Space and Time (LSST) Camera, which came online in June 2026.<\/p>\n

As explained in a Tuesday announcement<\/a>, Rubin Operations team member and project contributor Matthew Holman, of the Center for Astrophysics (CfA) at Harvard & Smithsonian, used search code he developed with CfA colleague Kevin Napier to analyze data captured before LSST operations commenced.<\/p>\n

The Observatory says Holman\u2019s and Napier\u2019s code \u201cis built to look at billions of detections of moving objects, compare them, and find the detections that correspond to the same object.\u201d<\/p>\n

On October 13, the code spotted an object so bright and distant that it is likely unusually large.<\/p>\n

\u201cMy first reaction was one of excited disbelief,\u201d Holman said. \u201cObjects like this are very rare, so I immediately started checking whether I or the code had done something wrong.\u201d<\/p>\n

Other astroboffins sprang into action, dug into other records, and soon found ten years\u2019 worth of relevant data.<\/p>\n

Once they all checked their sums, the Minor Planet Center reviewed their work and announced<\/a> the discovery of the romantically named 2026 ED138 and published lots of data about its orbit, which is at around 46 astronomical units (au). A single au is the distance from Earth to the Sun, and Pluto\u2019s orbit averages 40 au.<\/p>\n

\"\"<\/p>\n

Orbital pathway of newly discovered dwarf planet candidate 2026 ED138 (ED138), as observed by NSF\u2013DOE Vera C. Rubin Observatory. This image is a composite of multiple images captured by Rubin between 4 March and 11 July 2026 at intervals indicated by the teal circles. ED138 is visible at the center of each circle.<\/p>\n

https:\/\/rubinobservatory.org\/gallery\/collections\/news-images\/noirlab2626a<\/a><\/p>\n

Rubin Observatory revealed its part in the effort and declared that 2026 ED138 is a good candidate for certification as a dwarf planet.<\/p>\n

The 2026 International Astronomical Union defines<\/a> a dwarf planet as \u201can object in orbit around the Sun that is large enough to pull itself into a nearly round shape but has not been able to clear its orbit of debris.\u201d<\/p>\n

The Union\u2019s definition of a full planet includes having \u201can important influence on the orbital stability of the other objects in its neighbourhood.\u201d Dwarf planets whirl about the solar system in relatively close company with many rocky and\/or icy objects that orbit under the influence of other bodies, not the nearby dwarf planet.<\/p>\n

Rubin boffins think ED138 is between 600 and 1500 kilometers across. If the lower number is correct, it\u2019s the smallest dwarf planet yet observed. Should the larger number be correct, it would be smaller than Pluto, Eris, and Haumea, but larger than Makemake and Ceres.<\/p>\n

Scientists at the observatory think ED138 has evaded detection to date because it was found in a region of sky close to the plane of the Milky Way \u2014 meaning observers had to pick it out from light cast by billions of stars.<\/p>\n

\u201cRubin Observatory\u2019s regular and continuous monitoring of the entire Southern Hemisphere sky, combined with powerful algorithms that sift through millions to billions of points of light to identify those corresponding to small moving objects, enabled the team to spot ED138 within the crowded field,\u201d the facility boasted. \u00ae<\/p>\n

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