Re: Question: Celestron

AM wrote:
I dont think field rotation will be as much
a problem as much as the speed at which said planets
rotate themselves. I think on Mar's the longest I could
go before planetary rotation set in was 4 1/2 minutes
IIRC.

Unless 4 1/2 min of field rotation is worse...

In 4-1/2 minutes, Mars rotates a bit more than a degree on its axis.
When it is closest to us, that translates to about 0.25 arcseconds. The
upcoming opposition, it will be more like 0.15 arcseconds. If you get
good enough resolution where that becomes a problem, your resolution is
pretty darned good.

The field rotation is not worse than that, though, over the face of
Mars, provided you stay centered on Mars; it might only be worse in the
rest of the field, which you wouldn't care about.

--
Brian Tung <brian@xxxxxxx>
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.html
.

Relevant Pages

  • Re: Newbie looking for info on basic graphics with Delphi.
    ... The wireframe itself is of course three-dimensional; for rendering ... \y/ over an angle phi is done by ... Even knowing *why* it can't really do anything else than rotate ... since rotation is about the model's origin, ...
    (comp.lang.pascal.delphi.misc)
  • Re: translation and rotation in Euclidean space
    ... In the second place a single rotation only requires a 2x2 matrix. ... do and wish to rotate and translate a scene it is helpful if you process ... a 2d rank tensor, say Lij, a vector is a 1st rank tensor say Xi and ...
    (sci.physics.relativity)
  • Re: newbie: rotating meshes
    ... The problems I noticed, were if you for example rolled the ship, then tried ... not the rolled x axis, which says to me that the math for matrix ... concatenation doesnt rotate the values of the matrix correctly is some ... which meant the y roation rotated the models x axis whereas the z rotation ...
    (microsoft.public.win32.programmer.directx.graphics)
  • Re: translation and rotation in Euclidean space
    ... In the second place a single rotation only requires a 2x2 matrix. ... do and wish to rotate and translate a scene it is helpful if you process ... a 2d rank tensor, say Lij, a vector is a 1st rank tensor say Xi and ...
    (sci.physics.relativity)
  • Re: Cavorite: how does one correct ones course.
    ... I'm not seeing how this model accounts for the rotational velocity ... would be slowly closing as it approached Mars, ... How did the Apollo 11 moon capsule match Earth's rotation when it ...
    (rec.arts.sf.written)