Astronomers have spotted a new dwarf planet candidate in the solar system, beyond the orbit of Pluto, which they provisionally named ED138.
ED138’s diameter is estimated to be between 600 and 1,500 kilometers, which would make it bigger than the largest asteroid Ceres, which has a size of 945 km.
ED138’s diameter is estimated to be between 600 and 1,500 kilometers, which would make it bigger than the largest asteroid Ceres, which has a size of 945 km.
Scientists discover a never-before-seen potential dwarf planet in our solar system | CNN
ED138, a newly discovered dwarf planet candidate, could join a group of only five other recognized objects that includes our solar system’s former ninth planet.
edition.cnn.com
November 1, 2026 at 12:27 AM
Astronomers have spotted a new dwarf planet candidate in the solar system, beyond the orbit of Pluto, which they provisionally named ED138.
ED138’s diameter is estimated to be between 600 and 1,500 kilometers, which would make it bigger than the largest asteroid Ceres, which has a size of 945 km.
ED138’s diameter is estimated to be between 600 and 1,500 kilometers, which would make it bigger than the largest asteroid Ceres, which has a size of 945 km.
A new planet has been discovered by @rubinobservatory.org! It's called Ed*.
*2026 ED138, but just "Ed the planet" has a certain ring to it
*2026 ED138, but just "Ed the planet" has a certain ring to it
@rubinobservatory.org has found its first dwarf planet candidate: 2026 ED138.
It lies beyond Pluto, roughly 46 astronomical units out, and ranks among the biggest and brightest objects found in that part of the Solar System.
What do you think?
rubinobservatory.org/news/rubin-f...
🔭🧪⚛️ #planetsci
It lies beyond Pluto, roughly 46 astronomical units out, and ranks among the biggest and brightest objects found in that part of the Solar System.
What do you think?
rubinobservatory.org/news/rubin-f...
🔭🧪⚛️ #planetsci
October 29, 2026 at 8:39 AM
A new planet has been discovered by @rubinobservatory.org! It's called Ed*.
*2026 ED138, but just "Ed the planet" has a certain ring to it
*2026 ED138, but just "Ed the planet" has a certain ring to it
My impression of what ED138 might look like, way out there in the dark...
October 28, 2026 at 8:30 PM
My impression of what ED138 might look like, way out there in the dark...
OK, this is big.
The @rubinobservatory.org has detected its first candidate dwarf planet!
It's currently named 2026 ED138. When confirmed with follow-up observations, the number of known dwarf planets will go from 5 to 6.
Its orbit is shown with those of the other dwarf planets in this graphic.
The @rubinobservatory.org has detected its first candidate dwarf planet!
It's currently named 2026 ED138. When confirmed with follow-up observations, the number of known dwarf planets will go from 5 to 6.
Its orbit is shown with those of the other dwarf planets in this graphic.
October 28, 2026 at 5:47 PM
OK, this is big.
The @rubinobservatory.org has detected its first candidate dwarf planet!
It's currently named 2026 ED138. When confirmed with follow-up observations, the number of known dwarf planets will go from 5 to 6.
Its orbit is shown with those of the other dwarf planets in this graphic.
The @rubinobservatory.org has detected its first candidate dwarf planet!
It's currently named 2026 ED138. When confirmed with follow-up observations, the number of known dwarf planets will go from 5 to 6.
Its orbit is shown with those of the other dwarf planets in this graphic.
ベラ・C・ルービン天文台での観測データから、新たな準惑星候補の太陽系外縁天体「2026 ED138」を発見。海王星以遠で発見された準惑星候補の中で最大級である可能性があります。
詳しくはリンク先記事をご覧ください。
astropics.bookbright.co.jp/2026-ed138
詳しくはリンク先記事をご覧ください。
astropics.bookbright.co.jp/2026-ed138
October 29, 2026 at 8:34 AM
ベラ・C・ルービン天文台での観測データから、新たな準惑星候補の太陽系外縁天体「2026 ED138」を発見。海王星以遠で発見された準惑星候補の中で最大級である可能性があります。
詳しくはリンク先記事をご覧ください。
astropics.bookbright.co.jp/2026-ed138
詳しくはリンク先記事をご覧ください。
astropics.bookbright.co.jp/2026-ed138
Astronomers have spotted a new dwarf planet candidate in the solar system, beyond the orbit of Pluto, which they provisionally named ED138. https://cnn.it/48hu7vo
October 28, 2026 at 8:31 PM
Astronomers have spotted a new dwarf planet candidate in the solar system, beyond the orbit of Pluto, which they provisionally named ED138. https://cnn.it/48hu7vo
Lying beyond Pluto, 2026 ED138 could be as large as 1,500 kilometers in diameter. Astronomers are still working to confirm whether it meets the criteria for a dwarf planet.
Astronomers Discover a Possible New Dwarf Planet in Our Solar System
Lying beyond Pluto, 2026 ED138 could be as large as 1,500 kilometers in diameter. Astronomers are still working to confirm whether it meets the criteria for a dwarf planet.
buff.ly
October 29, 2026 at 9:03 AM
Lying beyond Pluto, 2026 ED138 could be as large as 1,500 kilometers in diameter. Astronomers are still working to confirm whether it meets the criteria for a dwarf planet.
Worlds like 2026 ED138 bridge the size gap between small asteroids and large planets, helping us understand how different types of objects in our Solar System formed and evolved.🔭🧪
Explore its orbit in Orbitviewer! orbitviewer.app/en/solar-ite...
🎥, 📸: NSF–DOE Rubinobs/NOIRLab/SLAC/AURA/R. Proctor
Explore its orbit in Orbitviewer! orbitviewer.app/en/solar-ite...
🎥, 📸: NSF–DOE Rubinobs/NOIRLab/SLAC/AURA/R. Proctor
— 2026 ED138
2026 ED138 is a large, bright trans-Neptunian object and dwarf planet candidate discovered in 2026 by scientists using data from NSF–DOE Vera C. Rubin...
orbitviewer.app
October 28, 2026 at 10:15 PM
Worlds like 2026 ED138 bridge the size gap between small asteroids and large planets, helping us understand how different types of objects in our Solar System formed and evolved.🔭🧪
Explore its orbit in Orbitviewer! orbitviewer.app/en/solar-ite...
🎥, 📸: NSF–DOE Rubinobs/NOIRLab/SLAC/AURA/R. Proctor
Explore its orbit in Orbitviewer! orbitviewer.app/en/solar-ite...
🎥, 📸: NSF–DOE Rubinobs/NOIRLab/SLAC/AURA/R. Proctor
New dwarf planet just dropped.
For now, it's called 2026 ED138. It appears to be ~1000 kilometers (600 miles) wide. If confirmed, that would make it a dwarf planet about half the size of Pluto. 🧪🔭
rubinobservatory.org/news/rubin-f...
For now, it's called 2026 ED138. It appears to be ~1000 kilometers (600 miles) wide. If confirmed, that would make it a dwarf planet about half the size of Pluto. 🧪🔭
rubinobservatory.org/news/rubin-f...
October 27, 2026 at 9:39 PM
New dwarf planet just dropped.
For now, it's called 2026 ED138. It appears to be ~1000 kilometers (600 miles) wide. If confirmed, that would make it a dwarf planet about half the size of Pluto. 🧪🔭
rubinobservatory.org/news/rubin-f...
For now, it's called 2026 ED138. It appears to be ~1000 kilometers (600 miles) wide. If confirmed, that would make it a dwarf planet about half the size of Pluto. 🧪🔭
rubinobservatory.org/news/rubin-f...
ベラ・ルービン天文台の観測データから準惑星の候補天体「2026 ED138」を発見
sorae.info/astronomy/20...
海王星よりも外側を公転する天体「2026 ED138」が発見されました。この天体は準惑星の候補とされており、ルービン天文台が見つけた初の準惑星候補だといいます
sorae.info/astronomy/20...
海王星よりも外側を公転する天体「2026 ED138」が発見されました。この天体は準惑星の候補とされており、ルービン天文台が見つけた初の準惑星候補だといいます
ベラ・ルービン天文台の観測データから準惑星の候補天体「2026 ED138」を発見
ベラ・ルービン天文台が初の準惑星候補「2026 ED138」を発見しました。海王星より外側を公転し、推定直径は600～1500km。無数の星々にまぎれていた天体を、観測データの解析で発見。重力で球形になっている可能性があり、赤外線による追加観測が注目されます
sorae.info
October 31, 2026 at 11:58 AM
ベラ・ルービン天文台の観測データから準惑星の候補天体「2026 ED138」を発見
sorae.info/astronomy/20...
海王星よりも外側を公転する天体「2026 ED138」が発見されました。この天体は準惑星の候補とされており、ルービン天文台が見つけた初の準惑星候補だといいます
sorae.info/astronomy/20...
海王星よりも外側を公転する天体「2026 ED138」が発見されました。この天体は準惑星の候補とされており、ルービン天文台が見つけた初の準惑星候補だといいます
Matt Holman: Data arc for possible new dwarf planet 2026 ED138 now goes back to 1956, possibly 1932. Matt says to go to Wikipedia for more information ;)
en.wikipedia.org/wiki/2026_ED...
#DPS2026
en.wikipedia.org/wiki/2026_ED...
#DPS2026
2026 ED138 - Wikipedia
en.wikipedia.org
October 29, 2026 at 3:58 PM
Matt Holman: Data arc for possible new dwarf planet 2026 ED138 now goes back to 1956, possibly 1932. Matt says to go to Wikipedia for more information ;)
en.wikipedia.org/wiki/2026_ED...
#DPS2026
en.wikipedia.org/wiki/2026_ED...
#DPS2026
@plutokiller.com - any thoughts re 2026 ED138?
October 27, 2026 at 10:37 PM
@plutokiller.com - any thoughts re 2026 ED138?
Möglicher neuer Zwergplanet im Sonnensystem entdeckt#Astronomie#Sonnensystem
Möglicher neuer Zwergplanet im Sonnensystem entdeckt
Bestätigt sich der seltene Fund, wäre 2026 ED138 erst der sechste bekannte Zwergplanet des Sonnensystems.
www.tagesschau.de
October 29, 2026 at 4:33 PM
Möglicher neuer Zwergplanet im Sonnensystem entdeckt#Astronomie#Sonnensystem
You can interact with the orbit for 2026 ED138 using this super slick web app:
orbitviewer.app/en/solar-ite...
orbitviewer.app/en/solar-ite...
— 2026 ED138
2026 ED138 is a large, bright trans-Neptunian object and dwarf planet candidate discovered in 2026 by scientists using data from NSF–DOE Vera C. Rubin...
orbitviewer.app
October 27, 2026 at 7:18 PM
You can interact with the orbit for 2026 ED138 using this super slick web app:
orbitviewer.app/en/solar-ite...
orbitviewer.app/en/solar-ite...
Today on the #arXiv :
Holman et al. 2026, "2026 ED138: A Large Trans-Neptunian Object in Early Rubin Observatory Data, and How Many More May Remain" - arxiv.org/abs/2610.38693
Reporting on the discovery of #2026ED138 and estimating that there are a few more things like it out there.
Holman et al. 2026, "2026 ED138: A Large Trans-Neptunian Object in Early Rubin Observatory Data, and How Many More May Remain" - arxiv.org/abs/2610.38693
Reporting on the discovery of #2026ED138 and estimating that there are a few more things like it out there.
2026 ED138: A Large Trans-Neptunian Object in Early Rubin Observatory Data, and How Many More May Remain
We characterize a large trans-Neptunian object (TNO), 2026 ED138, discovered in data taken by the NSF-DOE Vera C. Rubin Observatory with the linking code pointdexter, and validate it independently. 20...
arxiv.org
October 30, 2026 at 2:51 PM
Today on the #arXiv :
Holman et al. 2026, "2026 ED138: A Large Trans-Neptunian Object in Early Rubin Observatory Data, and How Many More May Remain" - arxiv.org/abs/2610.38693
Reporting on the discovery of #2026ED138 and estimating that there are a few more things like it out there.
Holman et al. 2026, "2026 ED138: A Large Trans-Neptunian Object in Early Rubin Observatory Data, and How Many More May Remain" - arxiv.org/abs/2610.38693
Reporting on the discovery of #2026ED138 and estimating that there are a few more things like it out there.
2026 ED138's V-band absolute magnitude seems to be 3.19. Back to "mid-sized TNO" bundle it goes.
October 30, 2026 at 4:56 AM
2026 ED138's V-band absolute magnitude seems to be 3.19. Back to "mid-sized TNO" bundle it goes.
Dank des Rubin-Observatoriums in Chile hat ein Forscher einen seltenen Himmelskörper gefunden: 2026 ED138 könnte der sechste bekannte Zwergplanet unseres Sonnensystems sein.
2026 ED138: Forscher entdecken möglichen neuen Zwergplanet
Dank des Rubin-Observatoriums in Chile hat ein Forscher einen seltenen Himmelskörper gefunden: 2026 ED138 könnte der sechste bekannte Zwergplanet unseres Sonnensystems sein.
www.spiegel.de
October 28, 2026 at 3:38 PM
Dank des Rubin-Observatoriums in Chile hat ein Forscher einen seltenen Himmelskörper gefunden: 2026 ED138 könnte der sechste bekannte Zwergplanet unseres Sonnensystems sein.
In shorthand, this body is being called ED138.
A very different proposition to an ED-209.
A very different proposition to an ED-209.
Robocop ED-209 Robot Enters Room
ALT: Robocop ED-209 Robot Enters Room
static.klipy.com
October 28, 2026 at 5:51 PM
In shorthand, this body is being called ED138.
A very different proposition to an ED-209.
A very different proposition to an ED-209.
#ICYMI: our Solar System has a newly-discovered dwarf planet candidate! Meet 2026 ED138, recently revealed by NSF–DOE Rubin Observatory ☄
Let's get to know this new world a little bit, shall we? 🔭🧪
rubinobservatory.org/news/rubin-f...
Let's get to know this new world a little bit, shall we? 🔭🧪
rubinobservatory.org/news/rubin-f...
October 28, 2026 at 10:15 PM
#ICYMI: our Solar System has a newly-discovered dwarf planet candidate! Meet 2026 ED138, recently revealed by NSF–DOE Rubin Observatory ☄
Let's get to know this new world a little bit, shall we? 🔭🧪
rubinobservatory.org/news/rubin-f...
Let's get to know this new world a little bit, shall we? 🔭🧪
rubinobservatory.org/news/rubin-f...
A new Dwarf Planet? Meet 2026 ED138, recently discovered by the Vera C. Rubin Observatory @VRubinObs.
This Trans-Neptunian Object (TNO) is estimated to be 600–1,500 km across. 🔭 #astro
This Trans-Neptunian Object (TNO) is estimated to be 600–1,500 km across. 🔭 #astro
October 27, 2026 at 10:27 PM
A new Dwarf Planet? Meet 2026 ED138, recently discovered by the Vera C. Rubin Observatory @VRubinObs.
This Trans-Neptunian Object (TNO) is estimated to be 600–1,500 km across. 🔭 #astro
This Trans-Neptunian Object (TNO) is estimated to be 600–1,500 km across. 🔭 #astro
2026 ED138 I shall call you “Ed”
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. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
Orbiting past Pluto, scientists found it in NSF–DOE Rubin Observatory data from earlier this year. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
October 27, 2026 at 7:42 PM
2026 ED138 I shall call you “Ed”
先日新たに発見された準惑星候補太陽系外縁天体「2026 ED138」ですが、なんと日本時間で明日(現地時間では今日)、ペルー・エクアドルなどの南米で恒星掩蔽を起こす可能性が高いです！
🌑 Stellar occultation by dwarf-planet candidate 2026 ED138!
📅 Oct 30 ~20:27 local in Ecuador/Peru (UTC-5) = Oct 31 01:27 UT
⭐ G=15.9, drop 3.9 mag, up to ~43 s
📍 Shadow most likely over N Peru & S Ecuador
South American observers, please record 01:24–01:31 UT!
🔭
📅 Oct 30 ~20:27 local in Ecuador/Peru (UTC-5) = Oct 31 01:27 UT
⭐ G=15.9, drop 3.9 mag, up to ~43 s
📍 Shadow most likely over N Peru & S Ecuador
South American observers, please record 01:24–01:31 UT!
🔭
October 30, 2026 at 9:20 AM
先日新たに発見された準惑星候補太陽系外縁天体「2026 ED138」ですが、なんと日本時間で明日(現地時間では今日)、ペルー・エクアドルなどの南米で恒星掩蔽を起こす可能性が高いです！
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. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
Orbiting past Pluto, scientists found it in NSF–DOE Rubin Observatory data from earlier this year. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
October 27, 2026 at 7:08 PM
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. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
Orbiting past Pluto, scientists found it in NSF–DOE Rubin Observatory data from earlier this year. Early analysis suggests it's ~600–1500 km across, one of the largest found past Neptune!🔭🧪
🔗: rubinobservatory.org/news/rubin-f...
A new trans-Neptunian object has just been discovered - 2026 ED138 - that is anomalously bright and as such may even been a dwarf planet. I did a deep dive into 2026 ED138 and what I discovered blew me away. This dwarf planet candidate may be the most significant astrological discovery since Pluto.
The Discovery of ED138 Changes Everything...
YouTube video by Stefan Burns
youtu.be
October 31, 2026 at 10:41 PM
A new trans-Neptunian object has just been discovered - 2026 ED138 - that is anomalously bright and as such may even been a dwarf planet. I did a deep dive into 2026 ED138 and what I discovered blew me away. This dwarf planet candidate may be the most significant astrological discovery since Pluto.