Also known as (9023) 1988 RG1, Mnesthus
asteroid

NGC 3660 and Burçin's Galaxy
2026-05-26
The upper galaxy might be more photogenic, but the lower galaxy is more unusual. The galaxy up top is NGC 3660, a spiral galaxy similar to our own Milky Way galaxy in that it has several bright blue spiral arms and a central bar of stars, dust, and gas. Captured by chance in the featured deep and colorful image, surprisingly, is SN 2026cff, a supernova found just to the right of the central bar. Farther in the distance is the bottom galaxy, known informally as Burçin’s galaxy, but formally cataloged as LEDA 1000714. The center of this galaxy appears to be an old elliptical galaxy, but it is strangely surrounded by not one but two rings of stars. What created Burçin's galaxy is a mystery and remains a continuing topic of research, but it likely involves the accretion of one or more smaller galaxies.
via NASA APOD
9023 Mnesthus eller 1988 RG1 är en trojansk asteroid i Jupiters lagrangepunkt L5. Den upptäcktes 10 september 1988 av det amerikanska astronom paret Eugene M. och Carolyn S. Shoemaker vid Palomar-observatoriet. Den är uppkallad efter Mnesthus, i den romerska mytologin. Asteroiden har en diameter på ungefär 49 kilometer.
Abstract from DBpedia / Wikipedia · CC BY-SA
via Wikidata · CC0
via Wikidata sitelinks · CC0
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).