Yes, there's a newly discovered world in town (that is, our solar system): the sednoid named by its discoverers 'Ammonite'. Maybe named for a certain novel? After all, there's already a crater on Europa named 'Uaithne'...
Welcome to our solar system, Ammonite!
Yes, there's a newly discovered world in town (that is, our solar system): the sednoid named by its discoverers 'Ammonite'...
nicolagriffith.com
July 19, 2025 at 7:32 PM
Yes, there's a newly discovered world in town (that is, our solar system): the sednoid named by its discoverers 'Ammonite'. Maybe named for a certain novel? After all, there's already a crater on Europa named 'Uaithne'...
YO NEW SEDNOID JUST DROPPED
Congrats to Ying-Tung Chen, @astrokiwi.bsky.social & co. on the discovery of 2023 KQ14, the 4th and smallest known sednoid! (diameter 130-260 km)
It has a perihelion of 65.9 AU and it isn't clustered like most of other extreme TNOs. 🔭 minorplanetcenter.net/mpec/K25/K25...
Congrats to Ying-Tung Chen, @astrokiwi.bsky.social & co. on the discovery of 2023 KQ14, the 4th and smallest known sednoid! (diameter 130-260 km)
It has a perihelion of 65.9 AU and it isn't clustered like most of other extreme TNOs. 🔭 minorplanetcenter.net/mpec/K25/K25...
April 14, 2025 at 11:38 PM
YO NEW SEDNOID JUST DROPPED
Congrats to Ying-Tung Chen, @astrokiwi.bsky.social & co. on the discovery of 2023 KQ14, the 4th and smallest known sednoid! (diameter 130-260 km)
It has a perihelion of 65.9 AU and it isn't clustered like most of other extreme TNOs. 🔭 minorplanetcenter.net/mpec/K25/K25...
Congrats to Ying-Tung Chen, @astrokiwi.bsky.social & co. on the discovery of 2023 KQ14, the 4th and smallest known sednoid! (diameter 130-260 km)
It has a perihelion of 65.9 AU and it isn't clustered like most of other extreme TNOs. 🔭 minorplanetcenter.net/mpec/K25/K25...
I’m moving to a distant sednoid with no atmosphere
August 16, 2026 at 11:54 PM
I’m moving to a distant sednoid with no atmosphere
Minor correction - 2023 KQ14 is a sednoid or a a trans-Neptunian object, not a dwarf planet.
October 23, 2025 at 6:41 PM
Minor correction - 2023 KQ14 is a sednoid or a a trans-Neptunian object, not a dwarf planet.
What was the Sun's birth cluster like? I loved reading about this method which uses the Sednoid objects in the outer solar system to investigate this 🧪☄️🔭
☄️ Michelle's first paper constrains the birth cluster of the Sun. Using N-body simulations and the orbital properties of the Sednoids in the outer Solar system, they can improve constraints on the density of, and time the Sun spent in, the cluster by an order of magnitude! 🔭 arxiv.org/abs/2510.19910
November 12, 2025 at 12:04 PM
What was the Sun's birth cluster like? I loved reading about this method which uses the Sednoid objects in the outer solar system to investigate this 🧪☄️🔭
Read more here: www.skyatnightmagazine.com/news/in-brie...
‘Ammonite' rare fossil-like object found on the edge of the Solar System | BBC Sky at Night Magazine
Ammonite is a newly discovered sednoid, an icy, distant Solar System object nicknamed after its spiral fossil‑like orbit.
www.skyatnightmagazine.com
July 20, 2025 at 6:05 PM
Read more here: www.skyatnightmagazine.com/news/in-brie...
it's a sednoid life for us
May 12, 2025 at 3:01 PM
it's a sednoid life for us
Our May transmission is now archived on Mixcloud 🎧
We opened with #LaurencePike's "notional" jazz and #KatatonicSilentio. Then @aspetuck.bsky.social , #Sednoid, and #Architectural on @delsinrecords.bsky.social Closed with #Karim #Tikita's desert-born techno.
🌈 Spring light, dissolving boundaries.
We opened with #LaurencePike's "notional" jazz and #KatatonicSilentio. Then @aspetuck.bsky.social , #Sednoid, and #Architectural on @delsinrecords.bsky.social Closed with #Karim #Tikita's desert-born techno.
🌈 Spring light, dissolving boundaries.
Listen again: Escala de Grisos / 05th May 2026
80th - #Downtempo
Playing tracks by Laurence Pike, Katatonic Silentio, Aspetuck, Colombian Drone Mafia ft. DJ Python, Architectural and more.
@escaladegrisos.bsky.social | www.mixcloud.com/camp_fr/esca...
80th - #Downtempo
Playing tracks by Laurence Pike, Katatonic Silentio, Aspetuck, Colombian Drone Mafia ft. DJ Python, Architectural and more.
@escaladegrisos.bsky.social | www.mixcloud.com/camp_fr/esca...
May 10, 2026 at 6:07 PM
Our May transmission is now archived on Mixcloud 🎧
We opened with #LaurencePike's "notional" jazz and #KatatonicSilentio. Then @aspetuck.bsky.social , #Sednoid, and #Architectural on @delsinrecords.bsky.social Closed with #Karim #Tikita's desert-born techno.
🌈 Spring light, dissolving boundaries.
We opened with #LaurencePike's "notional" jazz and #KatatonicSilentio. Then @aspetuck.bsky.social , #Sednoid, and #Architectural on @delsinrecords.bsky.social Closed with #Karim #Tikita's desert-born techno.
🌈 Spring light, dissolving boundaries.
So, no, which is valid. But I have 3 responses to that. First: there’s a reason that this work is only happening now even though the 3rd Sednoid was discovered in 2015: it took that long to get solid orbits. Second is falsifiability. Discover a 4th Sednoid and it’ll either work, or it won’t.
October 4, 2023 at 11:54 PM
So, no, which is valid. But I have 3 responses to that. First: there’s a reason that this work is only happening now even though the 3rd Sednoid was discovered in 2015: it took that long to get solid orbits. Second is falsifiability. Discover a 4th Sednoid and it’ll either work, or it won’t.
It is not a planet, but a sednoid, one of only four objects known to us with such characteristics.
Discovered by Japanese astronomers using the Subaru telescope in Hawaii.
Discovered by Japanese astronomers using the Subaru telescope in Hawaii.
August 31, 2025 at 9:46 PM
It is not a planet, but a sednoid, one of only four objects known to us with such characteristics.
Discovered by Japanese astronomers using the Subaru telescope in Hawaii.
Discovered by Japanese astronomers using the Subaru telescope in Hawaii.
A 4th known sednoid?!
minorplanetcenter.net/mpec/K25/K25...
minorplanetcenter.net/mpec/K25/K25...
MPEC 2025-G128 : 2023 KQ14
We are the official body that deals with
astrometric observations and orbits of minor planets (asteroids) and comets.
minorplanetcenter.net
April 14, 2025 at 4:23 AM
A 4th known sednoid?!
minorplanetcenter.net/mpec/K25/K25...
minorplanetcenter.net/mpec/K25/K25...
Dangit now I’m hungry for Sednoid Sundae
June 12, 2025 at 5:13 AM
Dangit now I’m hungry for Sednoid Sundae
Doug Chandler, Mid-Ohio & Laconia in '96 & '97 respectively; in both years he won the AMA's #1 plate.
Freelancing meant 25+ rolls, traveling back to Boston that night for E-6 (+1) processing, sorting & then Fed-Ex'ing slides to the editor who got me credentials.
#believeinfilm #Velvia 50 @sednoid
Freelancing meant 25+ rolls, traveling back to Boston that night for E-6 (+1) processing, sorting & then Fed-Ex'ing slides to the editor who got me credentials.
#believeinfilm #Velvia 50 @sednoid
October 20, 2024 at 2:12 AM
Doug Chandler, Mid-Ohio & Laconia in '96 & '97 respectively; in both years he won the AMA's #1 plate.
Freelancing meant 25+ rolls, traveling back to Boston that night for E-6 (+1) processing, sorting & then Fed-Ex'ing slides to the editor who got me credentials.
#believeinfilm #Velvia 50 @sednoid
Freelancing meant 25+ rolls, traveling back to Boston that night for E-6 (+1) processing, sorting & then Fed-Ex'ing slides to the editor who got me credentials.
#believeinfilm #Velvia 50 @sednoid
Learning about Sednoids and 3D printing up a mech inspired raven, as one does.
These Sednoid things are COOL!
en.wikipedia.org/wiki/Sednoid...
These Sednoid things are COOL!
en.wikipedia.org/wiki/Sednoid...
Sednoid - Wikipedia
en.wikipedia.org
July 28, 2025 at 4:33 AM
Learning about Sednoids and 3D printing up a mech inspired raven, as one does.
These Sednoid things are COOL!
en.wikipedia.org/wiki/Sednoid...
These Sednoid things are COOL!
en.wikipedia.org/wiki/Sednoid...
Correction: new SEDNOID dropped
It's paper day! We report the discovery of a new high-perihelion (q=66 au) world on a Sedna-like orbit, in the FOSSIL II survey with Subaru telescope of the outer Solar System
Chen et al., free to read: rdcu.be/ev6Zf 🔭🧪
Chen et al., free to read: rdcu.be/ev6Zf 🔭🧪
Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Nature Astronomy - The discovery of 2023 KQ14, a Sedna-like object with a perihelion of 66 au, fills a gap in the known population. Its orbit does not align with other Sedna-like objects,...
rdcu.be
July 15, 2025 at 10:05 PM
Correction: new SEDNOID dropped
Thanks!
Please note that 'sednoid' is not a term in widespread usage, so it is not a good coinage for the WP article
Please note that 'sednoid' is not a term in widespread usage, so it is not a good coinage for the WP article
July 15, 2025 at 10:23 PM
Thanks!
Please note that 'sednoid' is not a term in widespread usage, so it is not a good coinage for the WP article
Please note that 'sednoid' is not a term in widespread usage, so it is not a good coinage for the WP article
July 16, 2025 at 7:40 PM
Last month, I found the sednoid/high-perihelion TNO 2012 VP113 in Sloan Digital Sky Survey images from 2007—5 years before its discovery! Incorporating these new obs in VP113's orbit drops the uncertainty nicely (U=3.5→3.1). I've submitted these obs to the Minor Planet Center (now published). (2/3)
December 18, 2024 at 7:03 AM
Last month, I found the sednoid/high-perihelion TNO 2012 VP113 in Sloan Digital Sky Survey images from 2007—5 years before its discovery! Incorporating these new obs in VP113's orbit drops the uncertainty nicely (U=3.5→3.1). I've submitted these obs to the Minor Planet Center (now published). (2/3)
The griz magnitudes from DECam and SDSS (latter found by Sam Deen, pending submission to MPC) suggest 2017 OF201 is pretty red (apparently "almost as red as Sedna"), g-r=0.82, r-i = 0.41 (+/- 0.1 mag for both). groups.io/g/mpml/messa...
Re: New Large Sednoid 2017 OF201
Note: Your email address is included with the abuse report.
groups.io
May 21, 2025 at 11:04 PM
The griz magnitudes from DECam and SDSS (latter found by Sam Deen, pending submission to MPC) suggest 2017 OF201 is pretty red (apparently "almost as red as Sedna"), g-r=0.82, r-i = 0.41 (+/- 0.1 mag for both). groups.io/g/mpml/messa...
Thanks sednoid! This is my first time shooting it at night, it turned out well I think! 👍
December 21, 2025 at 11:20 PM
Thanks sednoid! This is my first time shooting it at night, it turned out well I think! 👍
A new discovery delivers a blow - not a decisive blow, but a blow nevertheless - to the Planet Nine hypothesis.
Sednoid 'Ammonite' (a ETNO) - or rather it's orbit - doesn't fit the clustering pattern that Planet Nine was theorized to explain.
www.astronomy.com/science/new-...
Sednoid 'Ammonite' (a ETNO) - or rather it's orbit - doesn't fit the clustering pattern that Planet Nine was theorized to explain.
www.astronomy.com/science/new-...
New Sednoid “Ammonite” discovery deepens Planet Nine mystery
Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine hypothesis.
www.astronomy.com
August 13, 2025 at 8:05 PM
A new discovery delivers a blow - not a decisive blow, but a blow nevertheless - to the Planet Nine hypothesis.
Sednoid 'Ammonite' (a ETNO) - or rather it's orbit - doesn't fit the clustering pattern that Planet Nine was theorized to explain.
www.astronomy.com/science/new-...
Sednoid 'Ammonite' (a ETNO) - or rather it's orbit - doesn't fit the clustering pattern that Planet Nine was theorized to explain.
www.astronomy.com/science/new-...
2/4 tím objektem je totiž těleso 2023 KQ14 (s krásným provizorním jménem Amonit), které žádnou novou planetou není.
Je to „jen“ další objevený sednoid (speciální skupina velmi vzdálených těles) o průměru asi 300 km. Pikantní na tom je, že...
Foto objektu: Scott Sheppard/CADC/NOIRLab
Je to „jen“ další objevený sednoid (speciální skupina velmi vzdálených těles) o průměru asi 300 km. Pikantní na tom je, že...
Foto objektu: Scott Sheppard/CADC/NOIRLab
August 5, 2025 at 11:06 AM
2/4 tím objektem je totiž těleso 2023 KQ14 (s krásným provizorním jménem Amonit), které žádnou novou planetou není.
Je to „jen“ další objevený sednoid (speciální skupina velmi vzdálených těles) o průměru asi 300 km. Pikantní na tom je, že...
Foto objektu: Scott Sheppard/CADC/NOIRLab
Je to „jen“ další objevený sednoid (speciální skupina velmi vzdálených těles) o průměru asi 300 km. Pikantní na tom je, že...
Foto objektu: Scott Sheppard/CADC/NOIRLab
Astronomers reported that"Ammonite is an object located beyondNeptune and classified as a"Trans-Neptunian Object (TNO)."Stating that"Ammonite's elliptical orbit makes it special," scientists announced that "Ammonite is included in"Sednoid"group,which has only three other similar objects like"Sedna."
July 20, 2025 at 2:26 PM
Astronomers reported that"Ammonite is an object located beyondNeptune and classified as a"Trans-Neptunian Object (TNO)."Stating that"Ammonite's elliptical orbit makes it special," scientists announced that "Ammonite is included in"Sednoid"group,which has only three other similar objects like"Sedna."
