Results 1 to 4 of 4
  1. #1
    cmassa's Avatar
    cmassa is offline HYPER GIANT
    Points: 50,598, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Mar 2013
    Location
    Chico, CA
    Posts
    2,123
    Points
    50,598
    Level
    100
    Thanks
    459
    Thanked 561x 431 Posts

    Default Polar alignment with only a view north - greater accuracy than polar scope?



    I am travelling to a family cabin in the Sierra Nevada Mountains this weekend. Very dark and at 5000 ft elevation so I hope to run this thing all night with the help of SGP. Anyway, it's on a lake and from the beach I only have a view north. Polaris is right in front of me. I do have an aligned polar scope and before you laugh at me, I would like to know if the software methods to improve my polar alignment can work with absolutely no view to the south. I can probably get with 2-4' PA error with my polar scope. I can see west along the trees but Arcturus is the farthest south I can see, and only just barely so I could possibly do an azimuth adjustment with PHD2 towards the west horizon. Can I get an Alt drift in PHD2 looking straight up? Please do not suggest ASPA, it does not work for me. A mountain and tall fir trees are behind me so a south view is not possible.

    I'm planning on imaging the heart and soul nebulas as they should be visible all night there. Do I just rely on the polar scope and go for it?

    Thanks,
    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
    Mounts: Software Bisque Paramount MX+, iOptron CEM60
    Cameras: Atik 383L+ mono with EFW2 filter wheel (36mm filters), Canon T2i - self-modded with Baader IR filter, ZWO ASI120MC, QHY5L-II mono, LodeStar X2
    My Astrophotography: http://www.astrobin.com/users/cmassa/

  2. #2
    Pitter's Avatar
    Pitter is offline HYPER GIANT
    Points: 24,236, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!50 Posts Achievement!Album Achievement!
    Join Date
    Dec 2012
    Location
    Hamilton, Ontario, Canada
    Posts
    4,833
    Points
    24,236
    Level
    100
    Thanks
    438
    Thanked 1,281x 1,155 Posts
    Blog Entries
    2

    Default Re: Polar alignment with only a view north - greater accuracy than polar scope?

    Have you done many old school polar alignments with the polar scope, or even just using the Kochab Clock method? If you have then I say go for it, but if not, it could be an issue.
    Mark
    Celestron: C11 ~ C8 Orange ~ Celestar 8 ~ CR150HD6 ~ C5 Orange ~ Comet Catcher ~ Firstscope 114
    Meade: Starfinder 10eq ~ AS80
    Imaging: ZWO ASI120MC ~ ZWO ASI224MC ~ ZWO ADC ~ Canon T3i ~ Meade OAG
    Mounts: CGEM ~ Vixen GPEQ5 Synscan ~ Wedged Forks ~ Starfinder GEM

  3. #3
    dcrowson's Avatar
    dcrowson is offline HYPER GIANT
    Points: 43,417, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Feb 2011
    Location
    O'Fallon, MO
    Posts
    3,051
    Points
    43,417
    Level
    100
    Thanks
    3
    Thanked 1,434x 1,211 Posts

    Default Re: Polar alignment with only a view north - greater accuracy than polar scope?

    Chris,

    based on your targets, I'm assuming you're using your widefield scope. With my Orion Atlas, simply putting polaris where it should be (using an app to determine) is good enough for me to take 30 minute exposures at 600 and 1368mm. Assuming you're guiding, I wouldn't waste more than a minute or two on polar alignment - ever.

    Dan
    Dan Crowson - O'Fallon MO

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Astro-Tech AT12RCT / AT90EDT - Moonlight CSL
    SBIG ST-8300M / STF-8300M w/FW8-8300 & OAG-8300 w/ST-i

  4. #4
    cmassa's Avatar
    cmassa is offline HYPER GIANT
    Points: 50,598, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Mar 2013
    Location
    Chico, CA
    Posts
    2,123
    Points
    50,598
    Level
    100
    Thanks
    459
    Thanked 561x 431 Posts

    Default Re: Polar alignment with only a view north - greater accuracy than polar scope?

    Quote Originally Posted by dcrowson View Post
    Chris,

    based on your targets, I'm assuming you're using your widefield scope. With my Orion Atlas, simply putting polaris where it should be (using an app to determine) is good enough for me to take 30 minute exposures at 600 and 1368mm. Assuming you're guiding, I wouldn't waste more than a minute or two on polar alignment - ever.

    Dan
    Yep, using the AT65.
    Thanks, I'll just get it with the polar scope and start imaging.

    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
    Mounts: Software Bisque Paramount MX+, iOptron CEM60
    Cameras: Atik 383L+ mono with EFW2 filter wheel (36mm filters), Canon T2i - self-modded with Baader IR filter, ZWO ASI120MC, QHY5L-II mono, LodeStar X2
    My Astrophotography: http://www.astrobin.com/users/cmassa/

 

 

Similar Threads

  1. Polar Alignment with minimal view
    By excelsior84 in forum Telescope Mounts Forum
    Replies: 16
    Last Post: 03-01-2014, 12:31 AM
  2. Polar Alignment with minimal view
    By excelsior84 in forum Astro Imaging Forum
    Replies: 6
    Last Post: 02-26-2014, 07:07 PM
  3. Polar Alignment scope
    By MadMaxwellSmart in forum Catadioptric Telescope Forum
    Replies: 19
    Last Post: 09-24-2013, 12:29 PM
  4. "No polar scope polar alignment" for SynScan EQ Goto mount - instructions
    By Clinton H in forum Astronomy Beginners Forum
    Replies: 1
    Last Post: 10-24-2012, 03:36 PM
  5. Polar Alignment - accuracy requirements for imaging
    By bfonseka in forum Astronomy Beginners Forum
    Replies: 8
    Last Post: 04-11-2012, 11:43 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 02:13 AM.