2009猎户座流星雨刚刚过去，大家观测了吗？
首先我先引入一段来至IMO的文章：
http://www.imo.net/node/1230
Orionids 2009
October's new Moon perfectly favours the Orionids at their peak in 2009. The shower's radiant, near the celestial equator, is at a useful elevation by around local midnight in either hemisphere, so most of the world can enjoy the shower. The shower peaks on October 21st, but has previously been noted to have several lesser peaks, sometimes helping activity to remain roughly constant for several consecutive nights centred on this peak. Observers should be aware of this possibility and attempt to observe for multiple nights.
Previous years have produced unexpectedly strong Orionid rates, with ZHRs better than the normal peak seen on two or three consecutive nights, at best up to 50-70. It will be interesting to see what takes place this year.
Visual observations can be reported through the Report Form and are as always highly appreciated. The observations are automatically included in an automated ZHR graph.
Submitted by Geert Barentsen on Wed, 2009-10-14 21:33. More Predictions & Information
（PS：请不要回复“不懂英文”之类的问题，我的英文只有小学水平，也能看懂不少，努力吧！）
从来自IMO的信息来看，这次流星雨的高潮时刻还是维持的比较长的，虽然没有爆发性，但有不错的持久性。
维持了足足2天哦。
回忆当时，我们广东南十字星会所在的广东地区，天气的确不怎么样。高云中云、弱冷空气，佛山居然还下了小雨（可惜不是流星雨）。什么“好事”来了。不过从世界各地提交的数据上，我们还是欣慰地看到，广东有一颗小红星。嘻嘻，是谁提交了数据呢？他就是Quanzhi Ye－－小龙。小龙，赞一个。默默地为天文事业付出，值得我们大家学习学习。
好啦～感慨完了～接下来继续转载IMO的详细数据。（留意一下图表哦～）
http://www.arm.ac.uk/~gba/imo/orionids2009/
Orionids 2009: visual data quicklook
IntroductionThis page shows automated results of the Orionids 2009, based on visual observations by volunteers astronomers collected through the report form of the International Meteor Organization (IMO). The information on this page is generated fully automatically; for scientific use please refer to manual analyses published in scientific journals (such as WGN). Send your feedback regarding this page to [email=gba(a)arm.ac.uk]Geert Barentsen[/email].
Page contents:
Activity profile
Observer statistics
Data access
Page generated: 2009 October 25 at 14:20 UTC.
Activity profileZHRmax = 44 based on 2429 reported Orionids, assuming population index r = 2.0.
ZHR (Zenithal Hourly Rate) is the number of meteors an observer would see under a dark sky with the radiant of the shower in zenith.
Time (UTC)SolarlonnINTnORIZHR2009-10-13 01:03199.7001011±112009-10-14 03:19200.78419244±12009-10-15 08:09201.9746103±12009-10-17 23:55204.611378610±12009-10-19 05:15205.825128918±22009-10-19 14:54206.225169122±22009-10-20 01:19206.6562320733±22009-10-20 03:23206.7421615241±32009-10-20 11:32207.079158825±32009-10-20 18:05207.3511011538±42009-10-20 22:35207.537138541±42009-10-21 01:03207.6403027836±22009-10-21 03:17207.7321112739±32009-10-21 08:11207.9351911828±32009-10-21 11:11208.059129930±32009-10-21 16:45208.29069139±42009-10-21 21:22208.48278842±42009-10-22 01:16208.643119030±32009-10-22 08:09208.929148734±42009-10-22 13:23209.14698833±32009-10-23 00:22209.6012120844±32009-10-23 02:18209.68278739±42009-10-24 02:59210.706128534±42009-10-25 03:29211.72373617±3
Time is the middle of the interval in Universal Time (UTC), Solarlon is the position of the earth relative to the sun (equinox J2000.0), nINT is the number of reported observing periods and nORI is the reported number of Orionids.
ZHR = (1 + sum nORI) / sum(Teff/C) where Teff is the effective observing time and C is the total correction for limiting magnitude, clouds and zenith correction 1/sin(hR).
Observer statisticsData has been received from 45 observers in 17 countries. Thank you for your efforts!
Spatial distribution of observersNote: click on the map for an interactive version.
Temporal distribution of observers
Table of observersObserverCountryTeffnORISalvador AguirreMexico14.06h189Jure AtanackovSlovenia2.92h138Pierre BaderGermany6.00h82Yi CaoChina1.88h28Filip ColakovicSerbia0.83h9Paul CraftAustralia3.88h48Tibor CsorgeiSlovakia3.33h48Mark DavisUnited States2.50h36Sietse DijkstraNetherlands3.58h22Ling FengChina3.00h25William GodleyUnited States3.50h13Wayne T. HallyUnited States7.50h68Vilem HeblikCzech Republic1.00h1Carl HergenrotherUnited States1.21h20Jeremy JefferisUnited States1.72h6Carl JohanninkNetherlands4.42h31Javor KacSlovenia9.42h292Jakub KoukalCzech Republic15.52h245Peter Van LeuterenNetherlands6.39h15Anna S. LevinaIsrael2.25h35Mike LinnoltUnited States2.10h53Yanzhe LiuUnited States1.5h33Xin LiChina1.42h39Jer Nan LouTaiwan2.43h26Qiang MaChina1.17h12Grigoris MaraveliasGreece6.13h105Pierre MartinCanada1.63h26Mikhail MaslovRussia1.90h1Koen MiskotteNetherlands10.22h99Sirko MolauGermany1.75h33Filip ?olakovi?Serbia0.83h9Du?an Pavlovi?Serbia0.66h5Rok PucerSlovenia4.26h120Ella RatzIsrael2.67h28Jurgen RendtelGermany8.98h121Mikiya SatoJapan3.33h81Tomoko SatoJapan3h83Ulrich SperbergGermany1.59h15Wesley StoneUnited States1.67h44Richard TaibiUnited States2.38h11Kazumi TerakuboJapan1.50h25Michel VandeputteBelgium10.62h40Shigeo UchiyamaJapan2.00h36William WatsonUnited States2.36h12Quanzhi YeChina0.45h5Xiang ZhanChina0.82h25
最后希望大家能一齐讨论讨论。
1.有无观测、观看这次2009猎户座流星雨？
2.时间、地点、天气，能看到多少颗呢？
3.怎么国内就沿海地区有提交数据呢？难道“第二阶梯”的天文爱好者比较少吗？
欢迎发表一下您的心声。
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