Celestron PowerSeeker 127 EQ 21049 (750 x 127mm) Telescope Logo

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Posted on Apr 21, 2011
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Can you describe how to use RA and DEC to find objects. I can find the planets ect....

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Joe Lalumia aka TelescopeMan

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  • Master 3,186 Answers
  • Posted on Apr 21, 2011
Joe Lalumia aka TelescopeMan
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Once the scope is polar aligned move it to a named star that you can identify. Look up the RA and DEC for that NAMED star in any planetarium phone APP or a laptop running any planetarium software like the free software available at www.stellarium.org

Adjust the circles to MATCH the RA and DEC in the planetarium software, and lock them down.

Now you can use them to find other objects of known RA and DEC.

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Manual for TwinStar 1000mm focal length telescope and equatorial mount

Equatorial mounts need to be polar aligned to work correctly. Once the scope is polar aligned (see manual or look online for polar alignment instructions), turn on the RA motor. Loosen your RA and DEC locks and find a object you want to view, The motor should keep the object in view for a while (depends on how good the motor tracks and how good your polar alignment is.) Spending 10 minutes polar alignment on my C8 keeps the object in view for about an hour without adjustment.
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Hi Joe, My name is also Joe and I just bought a Celestron AstroMaster 114 and need a hand with the elevation,inclination, declination settings(what should my gauges be set to) to star using the unit. Any...

Your DEC is the same as your Latitude--

Right Ascension does not matter for now. Polar Align the scope on the star Polaris-- read this:

http://arnholm.org/astro/polar_alignment/index.html

Once you are polar aligned, rotate the tube to a star in the sky that you KNOW the name of. Look up the Right Ascension of that star on a cell phone app or a laptop planetarium program like this one:
www.stellarium.org

Rotate the RA setting circle so it matches what the phone or laptop indicate. LOCK down the RA circle. Your scope is now adjusted to the sky and you can use the numbers on the DEC and RA to find other objects of known RA & DEC.


www.telescopeman.org
www.telescopeman.us
www.telescopeman.info
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I have a CPC11GPS telescope that was working the last time I used it, which was 6 months ago. It is in NEW NEW condition. I pulled it out last night, turned it on, allowed the system to align itself using...

The clutch is not engaging in RA. Maybe the gears are not actually meshing together? A loose worm gear?

You can open it up and look and see if anything obvious is loose. Otherwise it's a trip back to Celestron.
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Someone told me that the Meade Lightbridge could be equipped with Go-To Tecnology.T/F?

PUSH TO -- encoders can be mounted on to the base RA and DEC. After aligning on two known stars the hand controller will "point" to objects in the sky.

http://www.wildcard-innovations.com.au/kits/pn-lb-16d-spec_describe.html
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Go onto www.cloudynights.com and post this in the LX member forum-- and or go on YAHOO groups and post this in the LX90 forum--

Are you absolutely sure that your TIME and DATE and DAYLIGHT SAVINGS (yes-no) are correct.

On my LX90 the first alignment star is always NOT in the eyepiece but everything is OK once I center both alignment stars.
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Are you sure it's not actually working (tracking)-- can you hear the motor running?

I would contact Orion and make sure you have a manual for the hand-controller-- it may have a setting that turns tracking on or off.
http://www.telescope.com/control/main/
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Most problems tend to be mechanical. Have you 'trained' the drive and set the backlash values? Those 2 can have dramatic effects on pointing accuracy. Also, if the optical tube is not in alignment with the mount, then nothing will work correctly. To check that, have the telescope in Alt-Az configuration, inside the house, loosen the RA lock, and shine a laser pointer on the corrector plate. as the telescope is rotated about the RA, the reflected spot should be steady. Adjust the DEC to minimize the diameter of the circle that is drawn. What is left, is the out-of-true on the DEC axis. That can be adjusted with the tube cradle alignment bolts.
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