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  1. #1
    heman90210's Avatar
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    Default Polar Alignment question



    instead of using polaris as an alignment guide, can I use a compass

    i have this set up My new "PushTo" system

    its for my DOB

  2. #2
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    Default

    yes as long as you add 11 degrees.
    The mag north and celestial north are 11 degrees apart!
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  4. #3
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    Default

    The degrees depends on where you live. Here in the SE USA its more like 4 deg.


    Jim
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  5. #4
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    Quote Originally Posted by jenniferchristine View Post
    yes as long as you add 11 degrees.
    The mag north and celestial north are 11 degrees apart!
    Well, for Vancouver it's actually 17 degrees 28 minutes East. You are welcome to check GSC - Geomagnetism - Magnetic declination calculator
    Last edited by mplanet62; 12-03-2010 at 08:58 AM.

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  7. #5
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    I can hear Pierre rubbing his hands in anticipation of magnetic fees being sent ! Lol

    Clear Skies

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  8. #6
    jenniferchristine's Avatar
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    Default

    Perhaps he will accept the magnetic strip from my visa card
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  9. #7
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    Quote Originally Posted by jimt View Post
    The degrees depends on where you live. Here in the SE USA its more like 4 deg.


    Jim
    The OP needs to follow the link provided above to find his own... I live in Maryland close to Washington DC and the difference here is 10.3 degrees THIS YEAR

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    Default

    Dallas, Texas is about 5 degrees magnetic deviation -- this is important if you use a compass to rough align your goto scope on True North..... and of course if you use a compass on an EQ mount rather than the polar scope and Polaris.
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    Quote Originally Posted by Bob327 View Post
    The OP needs to follow the link provided above to find his own... I live in Maryland close to Washington DC and the difference here is 10.3 degrees THIS YEAR
    This is an important point that many people may not realize. The magnetic poles actually drift, because they are a product of the Earth's molten core. Depending on your location relative to the magnetic and true north, the declination value can vary by a few degrees in the course of a year.

  13. #10
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    Quote Originally Posted by IamSparticles View Post
    This is an important point that many people may not realize. The magnetic poles actually drift, because they are a product of the Earth's molten core. Depending on your location relative to the magnetic and true north, the declination value can vary by a few degrees in the course of a year.
    You are quite right, except quantatatively.

    It moves about 50 miles back and forth on any given day

    And since my last visit in the 1970s it has moved about 500 kilometers. (380 miles).
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