42P/Neujmin, also known as Neujmin 3, is a periodic comet 2 km in diameter. It will next came to perihelion on 14 January 2026 at around magnitude 19.
This comet and 53P/Van Biesbroeck are fragments of a parent comet that split in March 1845.Comets II. Lunar and Planetary Institute, University of Arizona. p. 236, 237, 314.Are Comets 42P/Neujmin 3 and 53P/Van Biesbroeck Parts of one Comet?
The comet did not come within 1 AU of a planet in the 20th century, but will pass 0.04 AU from asteroid 4 Vesta on July 17, 2036.
The comet nucleus is estimated to be 2.2 kilometers in diameter.
References
External links
at the Minor Planet Center database 42P/Neujmin at Gary W. Kronk's Cometography 42P/Neujmin at Seiichi Yoshida's website 42P/Neujmin at Gideon van Buitenen's website