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首页 » - 主题讨论区 - » Planetarian~星之梦 » 5/6.7寶瓶座流星雨
~戀雪~ - 2011/5/2 22:31:00
每年固定發生的寶瓶座η流星雨,預期今年數量最多的時間是在5月6日21時,
臺灣地區的最佳觀測時間是在5月7日凌晨2時~5時,預估每小時可有30顆以上的流星,
且無月光干擾,觀察條件不錯。5月7日適逢週六,不妨和親朋好友們一起規劃個尋星之旅。
(η為希臘字母,讀為「Eta,伊塔」)
寶瓶座η流星雨一般發生日期介在4/19~5/28之間,流星速度快(每秒66公里),
亮度中等(平均為2等),多數流星有餘痕。預測今年5/6/21時極大期時,ZHR約為70,
但這個流星群的輻射點約在凌晨1:30左右才東昇,已經過了今年預期的極大期時間,
流星數量稍減。雖然如此,這個流星群的特性之一,就是流星數量較多的時間頗長,
在5月3-10日之間,背景的ZHR約在30顆左右,相當於平均每2分鐘會出現一顆流星,
對喜愛觀賞流星雨的人而言,是不錯的觀賞目標。
寶瓶座η流星雨與10月20日前後發生的獵戶座流星雨都是由著名的哈雷彗星(1P/Halley)
遺留在軌道的塵粒所形成,可能因受到木星重力擾動而具有12年週期性。過去3年,
這兩群流星雨都出現比往年平均值多2-3倍的數量,今年應已回歸常態。
引用 http://tamweb.tam.gov.tw/bew/TW/content.asp?mtype=c1&idx=283



宝瓶座流星雨是著名的哈雷彗星带来的流星雨之一(另一个是猎户座流星雨)。
发生在每年的4月底5月初。极大一般出现在5月6日前后。流星速度快,尾迹长,多位白色。
比其每年发生的其他流星雨而言,宝瓶座流星雨并不太适合北半球中纬地区人们观测。
宝瓶座流星雨辐射点位于天赤道附近,辐射点升起时间大约在 1点,
等到辐射点升到较为理想的高度时,天也快亮了。宝瓶座流星雨理想观测条件下每小时流星数目可达40-85。
对于北半球中纬地区人们来说,即使没有光污染的夜晚,可以看到的流星数目也要大打折扣
2011年宝瓶座流星雨发生时正值新月后不久,月亮不会对观测造成影响。
引用自 http://chro.cpst.net.cn/xxkd/2010_12/293763651.html


香港預測

高峰時間: 5月7日(星期六)凌晨4時52分
高峰期間: 凌晨3時至5時15分
高峰時天頂每時出射率ZHR估計每小時可見流星數:
市區: 1 顆; 市郊: 7 顆; 鄉郊: 15 顆; 很黑地區:22 顆
5月7日凌晨5時高峰時間輻射點高度 13度
引用自 http://forum.hkas.org.hk/viewthread.php?tid=5253


這次的寶瓶座流星雨 這星期五凌晨.星期六清晨
輻射點是在東方略偏南
不過在北半球可能看不到很多
戀雪我打算三點多四點多爬起來去看流星雨
不知道到時候能不能醒過來呢 啊哈哈...
希望不會下雨
圖就麻煩思兼了

這次很多省觀測不太到這次的流星雨呀...

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新聞會播流星雨嗎0.0
水羊 - 2011/5/2 22:33:00
恩!? 寶瓶座!?
不就是我的星座嗎.....
阿阿阿~~我星座的流星雨
雖然那天是好天氣
但我早上8點半就要去考工程數學
無奈地只好等新聞後半撥出了 OTL
22_sparks - 2011/5/3 0:44:00
水瓶也是我的星座呀
不過 7/5要考會考英文…
思兼SRW - 2011/5/3 0:51:00
五月七号刚好周六 嘻嘻
panagion - 2011/5/3 1:56:00
恩,可以考慮去山上的小湖拍流星雨,[strike]不過得帶著書去複習……[/strike]早上五點……天已經有些亮了的時候啊,不太容易拍呢,那就三點半出門好了,拍到天亮回家複習XD

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轉資訊:
η–Aquariids (ETA)
Active: April 19 – May 28; Maximum: May 6, 13h UT (λ⊙ = 45.5°);
ZHR = 70 (periodically variable, ∼ 40–85);
Radiant: α = 338°, δ = −01°; Radiant drift: see Table 6;
V∞ = 66 km/s; r = 2.4;
TFC: α = 319°, δ = +10° and α = 321°, δ = −23° (β < 20° S).


A fine, rich stream associated with Comet 1P/Halley, like the Orionids of October, but one visible for only a few hours before dawn, essentially from tropical and southern hemisphere sites. Some useful results have come even from places around 40° N latitude in recent years however, and occasional meteors have been reported from further north, but the shower would benefit from increased observer activity generally. The fast and often bright meteors make the wait for radiant-rise worthwhile, and many events leave glowing persistent trains after them. While the radiant is still low, η–Aquariids tend to have very long paths, which can mean observers underestimate the angular speeds of the meteors, so extra care is needed when making such reports.
A relatively broad maximum, sometimes with a variable number of submaxima, usually occurs in early May. Fresh IMO analyses 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 most recent highest rates should have happened around 2008–2010, if this Jupiter-influenced cycle was borne-out, so ZHRs should be falling back from this peak in 2011, according to this idea.
Although activity in 2007 seemed unexpectedly weaker than normal (peak ZHRs maybe only ∼ 50), rates seemed to have been much better in 2008 and 2009 (ZHRs of ∼ 85 and 65 respectively). There seemed to have been no additional influence following the protracted, sometimes stronger than expected, Orionid returns from October 2006–2009 inclusive in the η–Aquariids in those years, as far as the available results allowed. New Moon on May 3 creates perfect viewing conditions for whatever the shower provides in 2011. All forms of observing can be used to study it, with radio work allowing activity to be followed even from many northern latitude sites throughout the daylight morning hours. The radiant culminates at about 08h local time.
亦心 - 2011/5/3 9:22:00
时间概念完全错乱的爬过。。
如果说东半球能够看到,那西半球是不是就看不到捏。。
panagion - 2011/5/6 20:34:00
天亮的太早了沒拍到╮(╯▽╰)╭TAT

流星雨在東邊太陽在東邊……╮(╯▽╰)╭

白起這麼早了……杯具TAT
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