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Originally Posted by Eroica
OK, I'll have another go.
The horizontal angle of view for 35mm film taken with a 50mm lens is 39.6°.
So, in your photo the angle between Venus and the Sun is about 19.8°?
26 May 2004 at 7:30 am |
Nope again; again, quite far off.
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Originally Posted by Eroica
(There are plenty of more recent dates that might also fit these parameters, but this was the first that caught my eye on the Ephemeris Generator.)
The horizontal angle of view for 35mm film taken with a 50mm lens is 39.6°.
So, in your photo the angle between Venus and the Sun is about 19.8°? |
That seems a good guess and holds a clue to the answer - from watching the simulated sky for the
true time the photo was taken [insert evil laughter smiley here], I guessed the angle to be close to 15° - but that was only "pi times thumb" reckoning.
May I venture that some lateral thinking is involved in the solution of the question. This is not an exercise in astronomical image processing, nor was this image taken with anything like astronomical/scientific accuracy in mind. I dare say astronomical software will be essentially useless. As you say, there are many dates with Venus being x ° away from the Sun. The sheer angular separation, even if you could compute ist to 0.x° would never give you a sufficient answer because you do not (and neither do I) know how far Venus was above/below the ecliptic nor do you even know how I held the camera when I shot this photo (did I shoot by hand; is the lower edge parallel to the local horizon? did I shoot from an alt-az mount; an equatorial...?).
May I also say that I think the information I have given in my post - image and text - is both necesessary and sufficient to produce the correct answer.
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Originally Posted by George
That's a nice picture, Arneb. I noticed the sky seems a bit blue; you must have taken it during the day.  |
Many thanks, and yes - now that you mention it, I think it was during one of those periods when the Sun is up during the day
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Originally Posted by George
Was that day in November?
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No, not that.
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Originally Posted by crosscountry
I'm glad to read that. I would be afraid to take a photo of the sun, even at short exposures.
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Oh, really? What about these (from Death Valley and Mono Lake area, respectively)?
Jus' kidd'n'
