# Looking for 2026 ED138 in older surveys turned up plates as early as 1954 **URL:** \ **Category:** Citizen Science\ **Created:** [October 29, 2026, 7:26pm UTC](https://www.rubin.community/t/looking-for-2026-ed138-in-older-surveys-turned-up-plates-as-early-as-1954/12897 "2026-10-29T19:26:35Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![eagnespuerto](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/eagnespuerto/32/4526_2.png) [@eagnespuerto](https://www.rubin.community/u/eagnespuerto)\ **Post date:** [October 29, 2026, 7:26pm UTC](https://www.rubin.community/t/looking-for-2026-ed138-in-older-surveys-turned-up-plates-as-early-as-1954/12897/1 "2026-10-29T19:26:35Z")
Hello! I am Ella Puerto, an independent researcher with no astro affiliations but I am interested in astrometry (usually exoplanets but I branch out) and have a lot of free time so I spent two days finding more observations from older surveys! 2010–2011, VISTA/VVV infrared survey\*\*:\*\* 15 positions on 4 nights. They sit within 0.1″ of the orbit. 1991, UK Schmidt plate: ED138 is 3″ from a brighter star. I fit and subtracted the star, and the object is left behind (S/N 17). 1982 and 1984, ESO Schmidt plates: clean detections at magnitude R ≈ 18.8, within 1″ of the prediction. The faint images are stretched along the direction ED138 was moving, which is a nice check that they’re the real thing. 1954, Palomar POSS-I red plate: 2.6″ off the prediction. The orbit’s uncertainty for 1954 was about ±87″, so it landed close. I sent the observations to the Minor Planet Center on October 28–29. They’ve been received, but they aren’t accepted yet, so treat this as pending until they are. Write-ups (not yet peer reviewed) with data and code: VVV 2010–2011: [Precovery of the Dwarf Planet Candidate 2026 ED138 in 2010–2011 VISTA/VVV Images | Zenodo](https://doi.org/10.5281/zenodo.23740113) Plates 1954–1991: [Photographic Precovery of the Dwarf Planet Candidate 2026 ED138 on 1954–1991 Schmidt Plates, and a One-Day Offset in SuperCOSMOS Plate Dates | Zenodo](https://doi.org/10.5281/zenodo.23765290) Happy to collaborate on a formal note/paper! (Moved post to correct section rather than as reply to another post) ![ed138_orbit_1954_2026_ig](https://us1.discourse-cdn.com/flex002/uploads/rubin/original/2X/a/aade1e0deaa8227ce85754faec4b405d6703bf6f.png) ![ed138_compilation_wide](https://us1.discourse-cdn.com/flex002/uploads/rubin/original/2X/9/9c93201eb3c6f0f85d4ce6b87cabf882234ce52e.jpeg) --- _[View the full topic](https://www.rubin.community/t/looking-for-2026-ed138-in-older-surveys-turned-up-plates-as-early-as-1954/12897)._