10月猎户座流星雨

2009 Orionids‏
        

发件人：	meteors@comcast.net
发送时间：	2009年10月14日 9:23:23
收件人：

   

The NAMN target shower for October is the Orionids. Activity from this
shower may be seen throughout most of the month as the shower is active
from October 2 to November 7. Peak activity, or their maximum, is
expected to occur on October 21 from a radiant of 06h20m (RA) +16 (DEC).
But the shower has been known to exhibit submaxima which may occur
anytime between October 18-24. With New Moon occurring near the time of
their peak, this is an especially good year to observe the Orionids.
     
The Orionids are particles from Halley's comet traveling at a velocity
of 66 km/s. As with other cometary showers of high velocity, observers
should watch for substantial train production by the Orionids. The
highest hourly rates are near 20 in most years under good conditions.
But in 2006 and 2007 strong displays occurred (ZHRs over 50), and their
is evidence that suggests this may continue this year.
     
Observations should be made after midnight in order to allow the radiant
time to rise to a sufficient height above the horizon. During the period
October 14-27, observers should be aware of the minor shower Epsilon
Geminids that will be active, and not confuse the two since meteors from
both showers will have similar velocities. As with other times when more
than one radiant is active, choose a field center that prevents the
backward prolongation of a possible shower meteor from crossing both
radiants. In this case, probably the best field of view is to the west
of the Orionid radiant.
     
For more information see the following two websites:
     
    http://meteorshowersonline.com/orionids.html   
     
    http://www.imo.net/calendar/2009#ori   
     
--
Mark Davis, South Carolina, USA
meteors@comcast.net
namn@namnmeteors.org
     
North American Meteor Network
    http://www.namnmeteors.org

最期待这个啦。。。。。

期待中~~~~~~~~~~~

希望下星期一如既往的好天气！！！！！！  

又是英文的！

这些都写的是什么呢？看不懂，有好心人帮助翻译吗？

。。。。。。

天气不错，观测准备中