Image of the day

Captured by
Byron Davies

M-20 Trifid Nebula

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Is the North Star true North?

Started by chgo51, 04/05/2002 06:52PM
Post Reply
Posted 04/05/2002 06:52PM Opening Post
Lawrence Karas
View public profile Send a private message to Lawrence Karas Find more posts by Lawrence Karas Find threads started by Lawrence Karas
Forum Member

Join Date: Feb 2002

Location: Missouri City TX, US

Posts: 9

Is it best to center the Noth Star with a crosshair eyepiece for alignment? Or is true North a little off-center? If so, which way? I'd like to understand this for alignment accuracy in a Go-To system.
Thanks,
Larry
Quote
Posted 04/05/2002 07:57PM #1
Phil Shute
View public profile Send a private message to Phil Shute Find more posts by Phil Shute Find threads started by Phil Shute
Forum Member
pas's avatar

Join Date: Apr 2002

Location: Peterborough NH, US

Posts: 10

Hi Larry,

Burnham's shows an RA/Dec of 1h 48.8m and 89d 02m (1950 coordinates) Using their precession map and a formula on the computer where I work (observatory), I come up with current
RA/Dec of (approx) 2h 21m 31s RA and 89d 17m 32s for April 2, 2002.

Phil Shute
Quote
Posted 04/05/2002 11:03PM #2
Mark Keitel
View public profile Send a private message to Mark Keitel Find more posts by Mark Keitel Find threads started by Mark Keitel
Forum Member
astroguy's avatar

Join Date: May 2001

Location: Brandon FL, US

Posts: 221

Depending on where your location is will determin how many degree off you are from "TRUE NORTH" using Polaris. If you want to know the deviation from your location here is a web site. All you will need to do is put in your location and this site will do the rest for you

http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnth1.pl

Hope this helps you
Quote
Post Reply

Funding Member

Sponsors


View all sponsors

Search