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Rubin Observatory discovers dwarf planet candidate 2026 ED138 beyond Pluto

Rubin Observatory announces discovery on social media

Rubin Observatory posted to Bluesky describing the dwarf planet candidate as orbiting past Pluto and estimated to be approximately 600–1500 km across, making it one of the largest objects found beyond Neptune.

Rubin Observatory announces discovery on social media
rubinobservatory.org

“Meet our Solar System's newest dwarf planet candidate: 2026 ED138! Orbiting past Pluto, scientists found it in NSF–DOE Rubin Observatory data from earlier this year.”

Rubin Observatory

Matthew Holman Astrophysicist, Center for Astrophysics | Harvard & SmithsonianMario Jurić Rubin Solar System Lead Scientist, University of WashingtonEdward Ajhar NSF Program Director for Rubin ObservatoryKathy Turner DOE Program Manager for Rubin Observatory

The whole story articlesposts the bright band is this development · numbered dots are the others · click one to jump

Peak 14 pieces in 3h at Oct 27, 5 PM; 134 pieces over 12 days (81 articles · 42 posts · 11 comments) Oct 27, 2 PM — 9 pieces · 8 articles · 1 post — Google News 8, Bluesky 1Oct 27, 5 PM — 14 pieces · 7 articles · 7 posts — Mastodon 4, Google News 4, Newswires 3, +3 moreOct 27, 8 PM — 8 pieces · 1 article · 4 posts · 3 comments — Reddit 3, Hacker News 2, Mastodon 2, +1 moreOct 27, 11 PM — 1 piece · 1 comment — Reddit 1Oct 28, 2 AM — 3 pieces · 1 article · 2 comments — Reddit 2, Google News 1Oct 28, 5 AM — 3 pieces · 1 article · 1 post · 1 comment — Reddit 2, Newswires 1Oct 28, 8 AM — 8 pieces · 7 articles · 1 post — Google News 5, Mastodon 2, Newswires 1Oct 28, 11 AM — 11 pieces · 9 articles · 2 posts — Google News 5, Newswires 4, Bluesky 1, +1 moreOct 28, 2 PM — 12 pieces · 7 articles · 5 posts — Google News 6, Hacker News 2, Mastodon 2, +2 moreOct 28, 5 PM — 8 pieces · 5 articles · 3 posts — Google News 5, Bluesky 2, Mastodon 1Oct 28, 8 PM — 1 piece · 1 post — Bluesky 1Oct 28, 11 PM — quietOct 29, 2 AM — 4 pieces · 2 articles · 2 posts — Mastodon 2, Newswires 2Oct 29, 5 AM — 4 pieces · 3 articles · 1 post — Google News 2, Reddit 1, Newswires 1Oct 29, 8 AM — 4 pieces · 1 article · 3 posts — Mastodon 2, Newswires 1, Hacker News 1Oct 29, 11 AM — 2 pieces · 1 article · 1 post — Google News 1, Mastodon 1Oct 29, 2 PM — 2 pieces · 2 articles — Google News 1, Newswires 1Oct 29, 5 PM — quietOct 29, 8 PM — 1 piece · 1 post — Mastodon 1Oct 29, 11 PM — quietOct 30, 2 AM — 9 pieces · 9 articles — Google News 9Oct 30, 5 AM — 1 piece · 1 article — Google News 1Oct 30, 8 AM — quietOct 30, 11 AM — 3 pieces · 2 articles · 1 post — Mastodon 2, Newswires 1Oct 30, 2 PM — quietOct 30, 5 PM — 1 piece · 1 post — Mastodon 1Oct 30, 8 PM — quietOct 30, 11 PM — 1 piece · 1 post — Mastodon 1Oct 31, 2 AM — quietOct 31, 5 AM — 4 pieces · 4 articles — Google News 4Oct 31, 8 AM — 3 pieces · 1 article · 1 post · 1 comment — Reddit 2, Google News 1Oct 31, 11 AM — quietOct 31, 2 PM — quietOct 31, 5 PM — quietOct 31, 8 PM — quietOct 31, 11 PM — 3 pieces · 2 posts · 1 comment — Reddit 2, Hacker News 1Nov 1, 1 AM — 1 piece · 1 comment — Reddit 1Nov 1, 4 AM — 1 piece · 1 article — Mastodon 1Nov 1, 7 AM — quietNov 1, 10 AM — quietNov 1, 1 PM — quietNov 1, 4 PM — quietNov 1, 7 PM — quietNov 1, 10 PM — 1 piece · 1 post — Mastodon 1Nov 2, 1 AM — 1 piece · 1 post — Mastodon 1Nov 2, 4 AM — quietNov 2, 7 AM — 1 piece · 1 article — Google News 1Nov 2, 10 AM — 4 pieces · 3 articles · 1 post — Google News 3, Reddit 1Nov 2, 1 PM — 1 piece · 1 comment — Reddit 1Nov 2, 4 PM — 2 pieces · 2 articles — Newswires 1, Google News 1Nov 2, 7 PM — quietNov 2, 10 PM — quietNov 3, 1 AM — 1 piece · 1 article — Google News 1Nov 3, 4 AM — quietNov 3, 7 AM — quietNov 3, 10 AM — 1 piece · 1 article — Google News 1Nov 3, 1 PM — quietNov 3, 4 PM — quietNov 3, 7 PM — quietNov 3, 10 PM — quietNov 4, 1 AM — quietNov 4, 4 AM — quietNov 4, 7 AM — quietNov 4, 10 AM — quietNov 4, 1 PM — quietNov 4, 4 PM — quietNov 4, 7 PM — quietNov 4, 10 PM — quietNov 5, 1 AM — quietNov 5, 4 AM — quietNov 5, 7 AM — quietNov 5, 10 AM — quietNov 5, 1 PM — quietNov 5, 4 PM — quietNov 5, 7 PM — quietNov 5, 10 PM — quietNov 6, 1 AM — quietNov 6, 4 AM — quietNov 6, 7 AM — quietNov 6, 10 AM — quietNov 6, 1 PM — quietNov 6, 4 PM — quietNov 6, 7 PM — quietNov 6, 10 PM — quietYesterday, 1 AM — quietYesterday, 4 AM — quietYesterday, 7 AM — quietYesterday, 10 AM — quietYesterday, 1 PM — quietYesterday, 4 PM — quietYesterday, 7 PM — quietYesterday, 10 PM — quietToday, 1 AM — quietToday, 4 AM — quietToday, 7 AM — quietToday, 10 AM — quiet 1
Oct 28Oct 29Oct 30Oct 31Nov 1Nov 2Nov 3Nov 4Nov 5Nov 6now · 1:14 PM ET

What was reported 7 claims about this development

  1. first by Scientific American, 11d ago · also Avi Loeb – Medium, Rubin Observatory, NOIRLab, The National Tribune, The Brighter Side of News, CNN +16

    21 more headlines
  2. first by NYT, 11d ago · also GeekWire, ScienceAlert, Yahoo News Singapore, BusinessLine, Yahoo, Chicago Tribune +10

    14 more headlines
  3. first by Newser, 11d ago · also Google News · Science, Gizmodo, CBC, Globe and Mail, Gulf Coast News and Weather, CTV News +6

    13 more headlines
  4. first by Mastodon, 11d ago · also Science News, Space

    1 more headline
  5. first by New Scientist, 11d ago · also Mashable

    1 more headline
  6. first by U.S. National Science Foundation (.gov), 11d ago · also Mirage News

    1 more headline
  7. first by WGBH, 11d ago

What people said 24 voices · best of 29 · verbatim

All 1 developments of Rubin Observatory discovers dwarf planet candidate 2026… →

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