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. 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 42P/Neujmin at the JPL Small-Body Database 42P at Kronk's Cometography 42P/Neujmin 3 at Seiichi Yoshida's website 42P/Neujmin at Gideon van Buitenen's website