The Ursid (URS) meteor activity begins annually around December 17 and runs for over a week, until the 25th or 26th.

The Ursids were probably discovered by William F. Denning, who observed them for several years around the start of the 20th century.

[1] Further observations in the 1970s and ongoing to current have established a relationship with comet 8P/Tuttle.

[1] Peter Jenniskens and Esko Lyytinen discovered that outbursts could happen when comet Tuttle was at aphelion because some meteoroids get trapped in the 7/6 orbital resonance with Jupiter.

The Ursids have a particularly narrow stream, prompting veteran meteor observer, Norman W. McLeod, III (Florida) to comment that the Ursids "must be a compact stream like the Quadrantids.