Jump to content


Photo

Polar alignment


  • Please log in to reply
3 replies to this topic

#1 GeorgeCarey

GeorgeCarey

    Member

  • Beta Tester
  • 345 posts

Posted 25 July 2015 - 05:15 PM

Having taken my mount off the pier and replacing it I have to do a new polar alignment.
The manual still says use 4 stars, but after calculating the pointing file the top option for polar alignment says '3 stars'.
Which is it?

I am assuming that the star chosen for the polar alignment 'move' should be due South and at the same altitude as my latitude (52 degrees).
Is this still the best option?

ASA DDM60Pro, homemade 8" and 10" reflectors, QSI 683 camera, Astrodon 5nm filters, Pulsar dome observatory. Website: http://www.geoastro.co.uk


#2 MarkS

MarkS

    Member

  • Beta Tester
  • 408 posts
  • LocationMelbourne, Australia

Posted 26 July 2015 - 05:34 AM

Hi George,

 

For PA, I always use the 3 star same DEC option, as was recommended by Philipp some time ago.

 

The PA star should be as you describe. I get good results if the star is within 5 degrees from the meridian, and within 5 degrees of my latitude.

 

I usually don't bother to get better than ~1-2 arcmin on each axis. MLPT easily deals with that error.

 

Mark



#3 GeorgeCarey

GeorgeCarey

    Member

  • Beta Tester
  • 345 posts

Posted 26 July 2015 - 01:16 PM

Thanks Mark.


ASA DDM60Pro, homemade 8" and 10" reflectors, QSI 683 camera, Astrodon 5nm filters, Pulsar dome observatory. Website: http://www.geoastro.co.uk


#4 Rsanalb

Rsanalb

    Member

  • Members
  • 38 posts

Posted 26 November 2015 - 12:05 PM

Good morning: I have a huge problem with the polar aligned, no access my observatory south or east, so I have just west and north and not all grades from 40th impossible to access the stars.
 
Align 3 star and I can not tell a star south to align. This makes it impossible to govern the saddle. Could you give me some solution?





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users