• Source: Draconids

The October Draconids, in the past also unofficially known as the Giacobinids, are a Northern hemisphere meteor shower whose parent body is the periodic comet 21P/Giacobini-Zinner. They are named after the constellation Draco, where they seemingly come from. Almost all meteors which fall towards Earth ablate long before reaching its surface. The Draconids are best viewed after sunset in an area with a clear dark sky.
The 1933 and 1946 Draconids had Zenithal Hourly Rates of thousands of meteors visible per hour, among the most impressive meteor storms of the 20th century. Rare outbursts in activity can occur when the Earth travels through a denser part of the cometary debris stream; for example, in 1998, rates suddenly spiked but only increased modestly in 2005. A Draconid meteor outburst occurred as expected on October 8, 2011, though a waxing gibbous Moon reduced the number of meteors observed visually. During the 2012 shower radar observations (which detect smaller and fainter meteors) detected up to 1000 meteors per hour. The 2012 outburst may have been caused by the narrow trail of dust and debris left behind by the parent comet in 1959.




References



Michael D. Reynolds. Falling Stars. Stackpole Books, 2001. p. 42.
Jun-Ichi Watanabe and Mikiya Sato. "Activities of Parent Comets and Related Meteor Showers". Earth, Moon, and Planets, Vol 102, No 1-4 (June 2008). p111-116.




External links


Draconid Meteors Over Spain (Astronomy Picture of the Day 2011 October 19)
The 2012 Draconid Storm Potentially Sampled By NASA ER-2 Aircraft Archived 2016-03-04 at the Wayback Machine (item 12)

Kata Kunci Pencarian:

• Draco (rasi bintang)
• Draconids
• Draco (constellation)
• 21P/Giacobini–Zinner
• Peter Millman
• 12P/Pons–Brooks
• Meteor shower
• List of meteor showers
• Boötes
• 1976 Tehran UFO incident
• Chinese mythology