[AZ-Observing] Re: Eclipse Photo and a Time-Lapse Sequence
- From: "Bernard Miller" <bgmiller011@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Wed, 16 Apr 2014 20:37:14 -0700
To,
Great images and video. You spent your time well at Picketpost :-)
Bernard
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Polakis
Sent: Tuesday, April 15, 2014 8:25 PM
To: AZ-Observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Eclipse Photo and a Time-Lapse Sequence
I just spent far too much time assembling this sequence, which uses images
taken 15 minutes apart for four hours. The images were taken through a TV101
at f/5.4 -- 1/1250s for partial phases and 2s for totality. A better sequence
would fix on the shadow, but registering those frames is a task for another day.
http://www.pbase.com/polakis/image/155251651
I noticed that the moon rotated gradually during the sequence, so here are two
frames at either end, four hours apart. This type of 'libration' is caused by
parallax; our vantage point changes by several thousand miles relative to a
240,000-mile baseline, so we can see slightly around the edges.
http://www.pbase.com/polakis/image/155251724
This triple exposure has frames taken one hour and 15 minutes on either side of
the middle of totality. It shows that the passage of the moon was not across
the center of the Earth's shadow.
http://www.pbase.com/polakis/image/155252027
Tom
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