This is the first double transit for my 4" TV-102 Light Cup. I observed from 8:00pm - 8:32pm (4:00-4:32 UT).
Bad seeing with gust of winds, only two bands seen.
Io's transit already on-going. Hard to see; saw inky black pin pricked point during moments of good seeing. Yellow #12 filter works better than all other filters and used the whole time thereafter. Max. 146x only. Shadow transit of Europa first seen at 8:24pm, Io’s shadow still seen near the western rim, but difficult. At 8:28pm, Europa shadow is at slightly “below” Europa, i.e. closer to the SEB. But it appears the shadow maybe partly covered by Europa. Maybe my the bad seeing was bouncing the dot around as I went out later at 8:48pm and Europa’s shadow appeared to be in the area of the EB. This is the closest shadow to Jovian moon I’ve ever seen! Couldn’t make out shadows at 110x. Later at 8:48pm, Europa’s shadow was clearly seen without filter at 110x and seeing appears to improve with less wind.
Ron B[ee]
Bad seeing with gust of winds, only two bands seen.
Io's transit already on-going. Hard to see; saw inky black pin pricked point during moments of good seeing. Yellow #12 filter works better than all other filters and used the whole time thereafter. Max. 146x only. Shadow transit of Europa first seen at 8:24pm, Io’s shadow still seen near the western rim, but difficult. At 8:28pm, Europa shadow is at slightly “below” Europa, i.e. closer to the SEB. But it appears the shadow maybe partly covered by Europa. Maybe my the bad seeing was bouncing the dot around as I went out later at 8:48pm and Europa’s shadow appeared to be in the area of the EB. This is the closest shadow to Jovian moon I’ve ever seen! Couldn’t make out shadows at 110x. Later at 8:48pm, Europa’s shadow was clearly seen without filter at 110x and seeing appears to improve with less wind.
Ron B[ee]
