IC 21
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IC 21 known as PGC 1785, is a distant barred spiral galaxy located in the Cetus constellation.[1] It is located 822 million light-years away and has an estimated diameter of 120,000 light-years.[2] IC 21 was first found by Stephane Javelle, who was a French astronomer on November 7th in 1891.[3] The galaxy is apparently located near towards a dwarf galaxy, PGC 3112047.[3] According to SIMBAD database, IC 21 is both a Seyfert type 2 and radio galaxy, suggesting an active galactic nucleus.[4]
References
- ↑ "IC 21 - Barred Spiral Galaxy in Cetus | TheSkyLive.com". https://theskylive.com/sky/deepsky/ic21-object.
- ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=1150&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1.
- ↑ 3.0 3.1 "Index Catalog Objects: IC 1 - 49". https://cseligman.com/text/atlas/ic0.htm#ic21.
- ↑ "IC 21". https://simbad.u-strasbg.fr/simbad/sim-basic.
