The Monocerotids refers to two separate meteor showers originating from the constellation of

Monoceros Monoceros (Greek: Μονόκερως, "unicorn") is a faint constellation on the celestial equator. Its definition is attributed to the 17th-century Dutch cartographer Petrus Plancius. It is bordered by Orion to the west, Gemini to the north, ...

. The

Alpha Monocerotids The Alpha Monocerotids is a meteor shower active from 15 to 25 November, with its peak occurring on 21 or 22 November. The speed of its meteors is 65 km/s, which is close to the maximum possible speed for meteors of about 73 km/s (see ...

, the more prominent of the two showers, takes place in November, while the second, lesser-known December Monocerotidsdecember monocerotids
''International Meteor Organization (IMO.net)'', accessed 1 March 2021
''www.astrosurf.com'', accessed 1 March 2021 shower takes place in December and appears to have an orbit similar to that of comet C/1917 F1 (Mellish).

References

Meteor showers November events December events Monoceros (constellation) {{Meteor showers