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樓主: WCYue

2011年10月30日,530號小行星掩星

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 樓主| 發表於 2011-11-9 07:47:27 | 顯示全部樓層
奇怪的現象 (二)

為甚麼這次小行星掩星預測與觀測有這樣大的偏差呢?

先從以往的預報與觀測結果比較....

...... 未完待續
發表於 2011-11-9 09:24:38 | 顯示全部樓層
回復 10# WCYue


I am also wondering what happened.
However, it is not the first time the prediction goes far off the mark.
On June 17, 2009, asteroid #146 (Lucina) was predicted to occult a 11-mag star in Virgo.  Hong Kong was predicted to be at the edge of the southern red line.  
In fact I forgot the slim chance of seeing this event that I organized all 20 participants of the Teachers' Astronomy Class to come to see the event (by coincidence, we have class that evening).  I was just about to explain that the occultation may not be visible at Hokoon when everyone shout out that the star had indeed disappeared!

In the end, we were able to see the occultation, but the timing indicated that we were quite close to centre of the path.

Please see:

http://forum.hkas.org.hk/viewthr ... amp;extra=page%3D27

pts
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