Here’s an image taken shortly after Spica’s reappearance from the moon’s dark limb, captured using a 4-inch f/9 refractor and a Canon 450D DSLR, 1/500 sec exposure, ISO 400. Photo Credit: Anthony Urbano
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© Anthony Urbano (Manila, Philippines)
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Hi Eteny,
Nice video.
The LiMove 3D star tool may help with the disappearance time. Here is a similar video I made in 2008…
Regarding the IOTA-VTI display. The hour glass symbol is there to signify that the GPS almanac might not be correct. You should let IOTA-VTI run for 15 minutes, so the hourglass disappears, before using it to time events. Most folks simply start IOTA-VTI at the beginning of setting up the telescope and by the time that’s done, IOTA-VTI will be ready to go.
Regards
Dave
Hi Dave,
I am very new to this field, this is probably my first successful attempt (complete with disappearance and reappearance). I have always wondered what is signified by that hourglass. I have yet to learn how to use processing programs so I could analyze the results of this observation and determine more precisely the time of disappearance and reappearance. :) Thanks for the help and guidance!
Eteny