Aurigids关于9月1日御夫流星雨的预报
An unusual shower on September 1, 2007Some time in the 40 years or so around 4 A.D., comet Kiess (C/1911 N1) passed by the Sun, ejecting a cloud of dust particles. The comet returned in 1911, after completing one orbit. The dust particles were pushed by the Sun's light into slightly wider orbits and have been returning ever since, forming a thin ongoing stream of dust that usually passes just outside Earth's orbit. On occasion, the combined gravity of the solar system's planets moves this dust trail into Earth's path. Earth encountered this 2000-year-old dust in 1935, 1986, and 1994, causing a meteor shower known as the Aurigids.
This very rare shower will occur again on 1 September 2007. A brief shower of tens of meteors will radiate from the constellation of Auriga, many as bright as the brighter stars in the sky. The Earth will be in the thick of it during the one hour centered on 04:33 a.m. PDT. The shower will be visible by the naked eye from locations in the western United States, including Hawaii and Alaska, from Mexico, and from the western provinces of Canada.
This unique encounter could provide insights about how long-period comets loose large dust grains and about how to translate the observed dust trail crossing into physical data about the parent comet, and even provide more evidence for the hypothesized "pristine crust" of a comet. This crust would be the product of cosmic ray bombardment during the years when the comet was in cold storage in the Oort cloud. chinese - s
看不懂 ::070821_09.jpg:: 希望预报的不准,右下角为今年的 PDT时间怎么换算~~~ +7=UT 高手能普及一下时区简写的知识嘛? year dE-dR Delta_a f_M Sol. Long. day time
2007-0.0003863 6.97261 0.005810 158.56148 UT Sep. 01 11:36
1994-0.0008137 6.02787 0.004612 158.73800 UT Sep. 01 08:01
1986-0.0003673 5.44971 0.016433 158.53043 UT Sep. 01 01:38
1935-0.0005241 1.74593 0.031045 158.65638 UT Sep. 01 03:05 再+8就是19:36~~~还是原来的预报时间么~~~ 也不是很密集嘛,我估计ZHR也就100 200 300了 原帖由 poweru235 于 2007-8-29 00:51 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
高手能普及一下时区简写的知识嘛?
GMT 格林威治标准时间 GMT
UTC 全球标准时间 GMT
ECT 欧洲中部时间 GMT+1:00
EET 东欧时间 GMT+2:00
ART (阿拉伯)埃及标准时间 GMT+2:00
EAT 东非时间 GMT+3:00
MET 中东时间 GMT+3:30
NET 近东时间 GMT+4:00
PLT 巴基斯坦拉合尔时间 GMT+5:00
IST 印度标准时间 GMT+5:30
BST 孟加拉国标准时间 GMT+6:00
VST 越南标准时间 GMT+7:00
CTT 中国台湾时间 GMT+8:00
JST 日本标准时间 GMT+9:00
ACT 澳大利亚中部时间 GMT+9:30
AET 澳大利亚东部时间 GMT+10:00
SST 所罗门标准时间 GMT+11:00
NST 新西兰标准时间 GMT+12:00
MIT 中途岛时间 GMT-11:00
HST 夏威夷标准时间 GMT-10:00
AST 阿拉斯加标准时间 GMT-9:00
PST 太平洋标准时间 GMT-8:00
PNT 菲尼克斯标准时间 GMT-7:00
MST 西部山脉标准时间 GMT-7:00
CST 中部标准时间 GMT-6:00
EST 东部标准时间 GMT-5:00
IET 印第安那东部标准时间 GMT-5:00
PRT 波多黎各和美属维尔京群岛时间 GMT-4:00
CNT 加拿大纽芬兰时间 GMT-3:30
AGT 阿根廷标准时间 GMT-3:00
BET 巴西东部时间 GMT-3:00
CAT 中非时间 GMT-1:00 wo,感激不尽 原帖由 活动星图 于 2007-8-29 00:53 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
也不是很密集嘛,我估计ZHR也就100 200 300了
200差不多 其实感觉不抱太大希望的好~~免得失望更大~~
PS:拉磨啊这两本书看到过没~~
http://www.astronomy.com.cn/bbs/thread-76891-1-1.html 恩 不过MXY说过监测还是有用的。
那2本没看过 学习了!坚持学习!我就不信看不懂了,哈哈。 他们的预报一向不准确的!
预报流星雨的流量等同与伪科学! 这话说的……………… 确实很打击人,但还是不想错过~~ 有200的流量我也会很欣慰的!
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