Observing the Jet in M87
Ray Gralak (ray@No-Spam)
Fri, 28 Apr 1999 20:56:35 -0700
> > Oooooo! Thanks for the image reference Jim!
> >
> > I wonder if I can capture the jet from my backyard? I calculate I
> > would need 200 minutes of exposure at f/16 to get the same S/N. But
> > it looks like I won't need quite that much. Was this image taken
> > from a dark site Jim?
> >
> > -Ray
>
> Dave Healey's observatory is about 12 miles S of Sierra Vista
> AZ, about 20-
> 25 miles to my E/SE. Not quite as dark as Sonoita but could
> be considered a
> dark site..magnitude 6+ at zenith. He also has some film pictures in
> Burnhams Celestial Handbook and a series of articles in the
> lates Astronomy
> magazine.
>
> Mike J. Shade: mshade@No-Spam
> Sonoita Hills Observatory, Sonoita Arizona
> See the observatory at http://c3po.cochise.cc.az.us/astro
> under the "telescopes and observatories" section.
Thanks Mike,
Well, then it might be tough. The good thing is that he used
an ST8 (not an ST8E) so that cuts my exposure time in half since
the 8E is twice as sensitive.
If the sky looks steady tonight I'll try it, but it is kind
of windy which usually means poor seeing around here.
-Ray