Re: M42 "sat photo"

Johannes Mueller (joh.mueller@rz-online.de)
Thu, 23 Sep 1999 22:40:45 +0200

Hi,


> > You are too quick here!
>
> Actually, not.  I spent several hours doing a wide range of
> satellite searches.  There is absolutely no way these are
> satellites.  Try it yourself with SkyMap.  Set the limiting
> magnitude as dim as you want.  Not one sunlit satellite
> makes a N-S pass on March 7 anywhere near M42 as viewed
> from Kelly, NC.  Let alone two.  Plenty of satellites at
> skew angles within 10 degrees tilt of N-S, but none within
> 2 degrees.  And the fact that many satellites KNOWN to have
> crossed the FOV are not visible in the picture says that only
> the brightest satellites could have been in the picture.  --Rob

I would like to add here:

The exposure time was 40 minutes. A Sat crossing the field of view in more
less time should have left a track which is visible in the regions with dark
background. The track should not (or more less) be visible in the bright
regions of M42, because of after-exposing (Nachbelichtung in german).

The photo shows the opposite of what we should expect. The nearer M42, the
brighter the track.

In my humble opinion: Definitely no Sats.

Johannes