reply to post by Soylent Green Is People
Well, yes, it's somewhat confusing and I had probably badly explained myself as in my screenshoots above, I only speculated about the possible path
that the object have done, following the idea of Chadwickus that the two (the one seen in two frames in front of the dunes and the other that starts
six frames later.) object were the same.
Anyway, to summarize, what we know is that:
- 5 sec. of time-lapse = 50 minutes or 3000 sec. real, so 1sec. = 10mns.
- 25 sec. exposure per frame
- 51 frames (2248 - 2197) is the total number of frames where the object is visible
- 2 sec.125 is the total "time-lapse time" during which the object is visible
- MP4 video is 24 frames per sec.
So we can deduce from that that:
- The object was visible during 21'25" in real-time and this result can be found in two ways:
1- Using the time-lapse frequence ([3000s.x2s.125]/5s.)
2- Using the exposure time (25s.x51)
Next step is to determine the angular size of reference objects, such as stars, to give an estimation of the speed and altitude of the "ufo"...
A useful site for ufology and astronomy research that I rarely use is Nova Astrometry
, which will be useful
here and which is capable to give any sky/stars position and references:
If you have astronomical imaging of the sky with celestial coordinates you do not know—or do not trust—then Astrometry.net is for you. Input
an image and we'll give you back astrometric calibration meta-data, plus lists of known objects falling inside the field of view.
We have built this astrometric calibration service to create correct, standards-compliant astrometric meta-data for every useful astronomical image
ever taken, past and future, in any state of archival disarray. We hope this will help organize, annotate and make searchable all the world's
Let's see how it works with our still frame extracted from the video by the team who produce the time-lapse:
I cropped it as follow in order to avoid possible misidentifications due to the object itself:
Next step is to upload the file (Quickly done if you have an account) and, after few seconds, we get all the informations needed, with a .kmz file:
Now, let's load the .kmz file into Google Sky:
Next step is to do a precise angle measurement and to report it on our original file:
Here, there's exactly 6° between these two stars from Cephee constellation (Béta Cep et 31 Cep)
Then, a simple calculation gives the exact angular size of the object: 4°40.
So the object moved by 4°40 in 25sec.
for each frame.
edit on 25-1-2013 by elevenaugust because: (no reason given)