February 20, 2000(UT)

Summary

伊藤氏の画像では、BE/FAがとらえられました。経度はBEが31度、FAが42度で、2個の白斑の経度差は11度です（ただし、気流の影響もあって精度はあまり良くありません）。

伊藤氏は新潟在住ですが、冬の天候の合間をぬって60cmカセグレイン（GOTO製、新潟県立自然科学館）を使用されての、デジタルビデオによる撮像です。

200mm Schmidt-Cassegrain
235x
Filters: Wratten 23A, 38A, 58
Seeing: 7-8/10 Transp.:6/6

I hope that you and the rest of your organization have been doing well since you last wrote. I was able to make an observation and have attached it for your review. I was also able to make a transit timing of the Great Red Spot (preceding edge and center; I was obstructed before I could make a following edge timing). I hope that you like it.

Date (U.T.): February 20, 2000
Time (U.T.): 00:53
L1 116.0 L2 074.5 L3 329.3
Instrument: 20-cm f/10 Sch/Cass
Mag.: 235x
Filters: Wratten 23A, 38A, 64
Seeing (1-10): 7-8, Antoniadi (I-V): II
Transparency (1-6): 6

Great Red Spot (GRS): preceding edge (L2 066.0 L3 320.8), center (L2 074.5 L3 329.3)

Carlos E. Hernandez (A.L.P.O.)

600mm Cassegrain, K-40mm, Collimated
Digital Video SONY DCR-PC100
5-9 frames composite