June bootids
|
Meteor shower June Bootiden |
|
|---|---|
| activity | |
| Beginning | June 22 |
| maximum | June 27th |
| The End | 2nd July |
| Radian position | |
| RA | 14 h 56 m |
| DE | + 48 ° |
| ZHR | variable |
| Population index | 2.2 |
| geocentric speed |
18 km / s |
The June Bootids are a meteor shower that has its radiant in the northern region of the Bear Guardian constellation . They are active between June 22nd and July 2nd. The maximum of the June Bootids, which is reached on June 27th, has a variable rate of meteors .
The mother body of this meteor shower is the comet Pons-Winnecke . At the beginning of the 20th century, the orbit of Pons-Winnecke was changed by the gravitational forces of Jupiter in such a way that the comet's orbit came very close to the orbit of the earth. This resulted in an increased rate of meteors in 1916, 1921 and 1927, as the earth moved through freshly released dust from the comet. The comet's orbit then moved away from the earth's orbit, so that the meteor shower no longer hit the earth.
Surprisingly, however, the June Bootids reappeared in 1998 and 2004. The meteors then observed originate from previously released dust, and their orbits differ greatly from the current orbit of Pons-Winnecke.
Usually the ZHR of the June Bootiden is so low that the meteor shower is hardly noticeable. In 1998 the ZHR rose for a short time to approx. 100 meteors / h, while the ZHR rose to approx. 50 meteors / h in 2004.
Web links
- http://www.aip.de/~rend/JBO.html
- http://www.astrocorner.de/index/02_wissen/01_kosmologie/01_sonnensystem/07_meteoroiden/junibootiden.php
- http://meteorshowersonline.com/showers/june_bootids.html
- http://spaceweather.com/meteors/junebootids.html
Individual evidence
- ↑ IMO Meteor Shower Calendar 2017 , accessed June 27, 2017