Re: Moon shot trivia

To a first order approximation, all celestial bodies have the same
apparent
motion, due to the Earth's rotation of roughly 15 degrees/hour. It is
certainly true that the Moon's apparent motion includes, in addition to

this, an additional component of roughly 360 degrees/month, or 0.5
degrees/hour, but for the purposes of computing a shutter speed fast
enough
to get a un-blurred shot, this is completely insignificant.

..........
Your point is well-taken. The Moon's apparent motion is quick but
nothing that can trouble the casual astrophotographer.


About "stacking" and planetary photography (just for the fun of it in
case anyone might try since it's easy with a driven scope and free
software):

The Moon is fairly well locked in its rotation, essentially always
presenting the "same side" to us. Actually it's more than 50% we see,
but no matter. With the planets they rotate at varying speeds and the
window to capture a stack varies with how fast the object is rotating
and our efl. and the atmospheric conditions at the time (great
conditions will offer finer detail which would "blur" in the stack when
a poorer night would allow a longer series).

One can stack lunar pics but the atmospheric distortion of a large
image vs. the dots that the planets offer makes for tougher lunar
stacking all on its own. Some nights the moon seems to be swimming in
water....

I've never had a sharp and decent result with the moon but now and
again someone gets a great capture.

.

Relevant Pages

  • Re: Moon shot trivia
    ... all celestial bodies have the same apparent ... motion, due to the Earth's rotation of roughly 15 degrees/hour. ...
    (rec.photo.digital)
  • Re: Being creative with natural phenomena
    ... speciifically differential rotation makes a guest appearance in the ... for crustal motion is like when it is easier to look elsewhere and see ... kill themselves explaining that stars and planets are different.The ... about the tool of the telescope when matched against the reasoning man ...
    (sci.geo.geology)
  • Re: Oriel36 and the Uranus video
    ... daylight when allied with daily rotation. ... At the Equator of Uranus there are no seasonal variations in ... degree motions with respect to the Sun with the orbital motion around ... appearances,the rotational orientation remains fixed in space ...
    (sci.astro.amateur)
  • Re: The horrible failure of science education
    ... >> Newtonian mechanics correctly. ... > motion derived from Flamsteed.He patches in elliptical motion by ... > until the 1930's with the recognition of the solar system's rotation ... due to gravity and due to the special effects in low temperature ...
    (sci.physics)
  • Re: The horrible failure of science education
    ... >> Newtonian mechanics correctly. ... > motion derived from Flamsteed.He patches in elliptical motion by ... > until the 1930's with the recognition of the solar system's rotation ... due to gravity and due to the special effects in low temperature ...
    (sci.physics.relativity)