親子觀星會

天龍座流星雨週三現高峰

http://tw.news.yahoo.com/%E9%96%83-%E5%A4%A9%E9%BE%8D%E5%BA%A7%E6%B5%81%E6%98%9F%E9%9B%A8%E9%80%B1%E4%B8%89%E7%8F%BE%E9%AB%98%E5%B3%B0-075712473.html

天龍座流星雨的活躍期很短，只在每年的10月6日至10日。此外，與其他流星雨相比，運行速度較慢，每秒20公里左右，其他流星的速度大多在40公里至60公里。不過，慢速流星有利於觀測和照相。


http://earthsky.org/astronomy-essentials/earthskys-meteor-shower-guide
http://astrobob.areavoices.com/tag/meteor-shower/

(http://astrobob.areavoices.com/files/2012/10/Draconids-mine2012.jpg)

imo
http://www.imo.net/calendar/2013#dra
(http://www.imo.net/galleries/calendar/img/DRA.jpg)

Active: October 6—10; Maximum: October 8, 17h30m UT (λ⊙ = 195.4°), but see text;
ZHR = periodic, up to storm levels;
Radiant: α = 262°, δ = +54°; Radiant drift: negligible;
V∞ = 20 km/s; r = 2.6;
TFC: α = 290°, δ = +65° and α = 288°, δ = +39° (β > 30° N).