- Unguided with pointing model
Re: Unguided with pointing model
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We're not so far apart on our setups:
i have an OAG with Lodestar that is 752 x 582 8.4u @840mm focal length
Your camera has the TC-237 tracking CCD (657 x 495 pixels at 7.4u) @ 1620mm focal length
yes of course you're imaging at 2x focal length (yes i'm jealous :) ) but PHD also has noise reduction, star saturation detection, minimum star size, etc. to eliminate erroneous star selection. might be worth a visit to PHD forums?
i'll stop on this now haha
On Thu, May 28, 2020 at 4:01 PM Mojo Jones <mojo@...
Thanks for chiming in Brian! I'm sure much of my difficulty comes
from using the built-in off-axis guide camera on my ST-4000XCM, so I
don't have the privilege of a wider-field guide scope. Quite often
this past week I haven't had a wide enough field to find a bright
enough star to peek up above the sky glow. PHD2 presents a gnarly
grey noisy field, and "auto select" latches onto something that's
often not a star at all.
I'd love to tweak PHD2 so it doesn't latch onto non-stars. I built a
bad pixel map.
On 5/28/2020 12:58 PM, Brian Valente
>>>My biggest bugaboo in these skies is finding a
suitable guide star. PHD2 will lock onto any clump of noise and
hunt around the sky trying to guide on it.
I'm not sure what issue you are having, but i image in the san
fernando valley (the worst) and i have no problems finding
guidestars, even with a simple lodestar x2. PHD has a number of
techniques and filters to rule out non-stars for star selection,
so i'm surprised you are having these kinds of issues
you might consider posting your logs to the PHD forums for
On 5/28/2020 12:48 PM, Mojo Jones wrote:
My biggest bugaboo in these skies is
finding a suitable guide star. PHD2 will lock onto any clump of
noise and hunt around the sky trying to guide on it.
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