Prediction of 2013 Apr 8.3 作者:
occult 時間: 2013-7-7 04:21
小行星光度變化曲線數據
小行星編號及名稱 89 淫神星(Julia)
反照率 -.-
自轉週期 -.-- 小時
.. 10 分鐘旋轉 --.- 度
.. 旋轉 5 度需時 -.- 分鐘
最大光度變化 0.10 等
=> 最大自轉軸比例 1.10 : 1
最小光度變化 -.- 等 作者:
occult 時間: 2013-8-10 03:26
8月10日5時全天雲量預測(init+9小時)
白色表示厚雲
灰色表示薄雲
淺藍色表示有雲
深藍色表示晴天
作者:
occult 時間: 2013-8-11 05:19
PTS:
When we slewed back to the occultation target after 2 am, a VERY bright "star" had entered the FOV. This must be the asteroid itself, and I started to capture at 1 frame/5 minutes to record the movement of teh asteroid.
As it approached 04:59, the start of the "bracketed time", the star and the asteroid were very close but definitely separated. Exposure was cut to 1/15 second and still the 12.1 mag star was clearly visible. Video recording started and the screen visually monitored until the 2 separated again at 05:15 am, the end of the "bracketed time".