2009年的第二场大流星雨--宝瓶座η流星雨目视观测指南
本帖最后由 948221078 于 2009-5-5 12:06 编辑2009年的第二场大流星雨即将在五月初到来，如果说第一场流星雨象限仪座流星雨是夏日午后的暴雨，那么宝瓶座η流星雨就是一场连绵数日的梅雨。此流星雨活跃期从4月19日到5月28日。它有一个较宽的极大，其中在5月3日到10日期间，ZHR都会大于30，想想这相当于下几次天琴座流星雨啊。预报极大将出现在黄经45。5度，即北京时间5月6日8时，每小时天顶流量85。由于宝瓶座流星群辐射点靠南（赤经338度，赤纬-1度）且天亮前才升起，所以可观测的时间并不多，在中国观测位置越靠南越好。五月初黎明时月亮已经落下，对观测无影响。黎明时观测可以面朝东仰视天顶，东，北，南三面的高空，西面低空流星出现的概率不大，就别往那看了。流星特点快速而明亮，当辐射点仍然很低的时候，群内流星常有很长的轨迹，容易使观测者容易低估流星的角速度。该流星群受木星影响有一个12年的爆发周期，下一次爆发高潮预计在08-10年之间，07年ZHR为50左右，08年为65。今年的流量可能很可观，让我们拭目以待吧。
如有什么疑问，欢迎加入我开设的“中国流星观测者联QQ群”讨论 群号67533285
文章来源：http://fjtxp.uueasy.com/read.php?tid=1441
撰文：贪星鬼
η-Aquariids (ETA)
Active:April 19-May 28
Maximum:May 6 0h UT (λo = 45°5)
ZHR =85 (periodically variable - ~ 40-85)
Radiant:α = 338° δ = -01°
v∞ =66 km/s
r = 2.4
辐射点位置图：
http://ah.img1001.com/uu2/uu_0904_5/fjtxp_34_1_986dcdfa4a8054c.jpg
辐射点位置与时间关系
http://ah.img1001.com/uu2/uu_0904_5/fjtxp_34_1_374fa49868ec221.jpg
2008年宝瓶座η流星雨的观测结果
ZHRmax = 65 based on 643 Eta-Aquariids in 110 data intervals
http://ah.img1001.com/uu2/uu_0904_5/fjtxp_34_1_2c7c9e2e24ec697.jpg 请教辐射点和观测方向是什么区别?
我如果拍摄,相机应该朝向哪个方向守候更有机会呢?
辐射点具体是什么意思,,谢谢楼主
罗大佑888 发表于 2009-4-23 22:29 http://www.astronomy.com.cn/bbs/images/common/back.gif
辐射点是所有群内流星方向延长线的交点，大多数流星只有在距离辐射点远一些的时候才能被看到。照相机拍摄时候可以将照片长横轴对辐射点，以便射向画面中心的流星与之垂直。还可以把照相机指向距离辐射点三四十度的天区 请问楼上的你拍到过流星吗?1361192.gif 不错的观测指导::070821_09.jpg:: ::070821_07.jpg::
大家支持下 绝对支持到底。::42:: 五一到漳州观测宝瓶座流星雨 LZ提供的资料很及时，多谢！如果天气允许的话我们天津同好也将出动观测！ Eta Aquarids
Now that the Lyrids are over you do not have much time to prepare for
the more active Eta Aqaurids (ETA). This shower is active at the same
time as the Lyrids, but does not reach maximum activity until May 6.
What makes this shower interesting to me is the fact it is associated
with the same comet that the Orionids of October are – Comet 1P/Halley.
This shower is best observed right before sunrise so I would recommend a
late morning watch if you are only able to observe on a single morning.
Eta Aquarids are fast meteors at 66 km/s and are noted for leaving
persistent trains. Here are the particulars on this shower according to
the International Meteor Organizations (IMO):
Active: April 19 - May 28
Maximum: May 6
ZHR = 85 (rates have been variable though from about 40 to 85)
Radiant: 22h 32m RA; -01 DEC
Regarding activity from this shower, the IMO website states “Fresh IMO
analysis in recent years, based on data collected between 1984-2001,
have shown that ZHRs are generally above 30 between about May 3-10, and
that the peak rates appear to be variable on a roughly 12-year
timescale. The next highest rates should fall towards 2008-2010, if this
Jupiter-influenced cycle is borne-out, thus ZHRs could be around their
very best in 2009, according to this idea.” But the IMO also cautions
that there is some “uncertainty over what may happen” this year. The
only way to know for sure is to have as many observers as possible out
observing.
An excellent history of this shower is available on the Meteor Showers
Online webpage of Gary Kronk at:
http://www.meteorshowersonline.com/eta_aquarids.html
If you are new to observing I recommend you take a look at our observing
guide at http://www.namnmeteors.org especially Chapter 2 which discusses
visual observing in detail. Additionally, I have a short and condensed
primer on visual observing available electronically. To make reporting
easier, it even comes with an observing period summary template. For a
copy, just drop me an email. Reports can be sent directly to me or the
mailing list, and I will publish the reports as soon as I can on our
website at:
http://www.namnmeteors.org/recent_observations.html
Clear skies, and good luck!
--
Mark Davis, South Carolina, USA
meteors@comcast.net
namn@namnmeteors.org
North American Meteor Network
http://www.namnmeteors.org 3日黎明天已亮时观测到一颗-3等群内流星 辐射点向北飞行 黄色高速 挖挖挖~~~~~~~~忽忽 没想到今年的宝瓶座会带来惊喜呢
页:
[1]