Ursids - meteor shower with a radiant in the constellation Ursa Minor .
| Ursids | |
|---|---|
| Activity period | December 17 - 26 |
| Activity High Date | December 22 |
| Radiant coordinates | α = 217 °, δ = + 76 ° |
| Antiaircraft hour number | ten |
| Observed speed | 33 km / s |
| Opening year | 1945 [1] |
| Ancestor | 8P / Tuttle |
| room | 00015 |
| Code | URS |
Ursid activity begins on December 17 and lasts about a week, until December 24 or 25 . In 2005, the maximum activity of the flow falls on December 20 at 1:00 (MSC).
Content
History
The Ursids were probably discovered by W. Denning , who observed them for several years at the beginning of the 20th century . After that, they were observed by chance, and the first planned observations of the stream were begun by A. Bekwar in 1945. Further observations in 1970 and later made it possible to establish a connection between Ursid and Comet Tuttle .
Stream Information
During earlier observations, an approximate radiant α = 217 °, δ = + 76 ° v = 33 km / s was found, with a maximum around December 22, with a flow period from December 17 to December 24 . The number of meteors is usually about 10 per hour, however, in 1945, astronomers recorded up to 120 meteors per hour.
Notes
- ↑ Babadjanov P.B. Meteors and their observation. - M .: Nauka , 1987. - S. 167. - ( Library of the astronomy lover ).