Paul,
I have a permanent remote observatory in New Mexico so I don't have to polar
align each night. If you are mobile and have to do polar alignment each
night it is very difficult to be accurate every time so you will have to
live with the variability. Also keep in mind that seeing conditions will
affect tracking. Even with my permanent setup, there are nights I have to
shutdown because the seeing and hence the guiding are too poor to get good
results. The other option if you have a remote setup is to get an Alt-Az
mount that does not need polar alignment. You will need a derotator for
this, but you won't have to polar align.
Thanks,
Bernard
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Ruger1bc
Sent: Sunday, December 24, 2017 7:32 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: NGC281 - The Pacman Nebula in narrowband
OMG that is the question of the ages. I will await the answer from the
master!
On Dec 23, 2017, at 10:26 PM, Paul <emailpa@xxxxxxx> wrote:
Awesome. Your dedication is obvious in the amazing image.
Question: When I set up my mount and scope and polar align, I get
varied results one night to the next. Sometimes the tracking is
super, other nights good but not great. You must have had the scope
aligned very consistently night after night. Is there a technique to
assure consistent alignment and tracking?
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Bernard Miller
Sent: Saturday, December 23, 2017 8:13 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] NGC281 - The Pacman Nebula in narrowband
Hi,
This is an image of NGC281, also known as the Pacman Nebula. It is an
emission nebula about 9,500 light years away in the constellation
Cassiopeia. It is called the Pacman Nebula because of its resemblance
to the video game character. It is associated with the open cluster IC
1590 in the center of the image, along with several Bok globules near
the center of the image.
Comments and suggestions appreciated.
http://www.azstarman.net/CDK/NGC281_NB.htm
Thanks,
Bernard
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