February 24, 2009

Comet Lulin Passing Saturn---the Movie!

The sub-frames taken for the image below are put together in a movie accessible here! What you will see in the movie are two, 9-minute periods with about a 20-minute break in between them (during which 20-minute break the comet shifts position noticeably). This is time lapse: the whole movie is only 1 minute long---40 minutes crammed into 1 minute.

Pay careful attention please to the position of the comet relative to the background stars. The movement is easiest to see against those stars' positions.

The first 9-minute set of sub-frames was taken at 800 ISO and is 20 frames of 20 seconds each with 3-second intervals in between. The second is the same only taken at 1600 ISO.

Enjoy!

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