PGC 29820 (known as JO204) is a spiral galaxy 600 million light-years from the Solar System, in the Sextans constellation.

[3] PGC 29820 is classified a massive galaxy with a stellar mass of M* = 4 x1010 M.[4] It contains an active galactic nucleus with double-peaked narrow lines.

[8][9][10] According to Gullieuszik, the galaxy is currently in a first phrase of infalling into the cluster where it is subjected to ram pressure by the intracluster medium.

[2] Because dense gas is compressed, it eventually collapses to form new stars in both the galaxy's tail and its disk.

[2] In additional, PGC 29820 shows a large presence of molecular gas making up H2 mass of 8.3 x 109 M○.