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Showing results for tags 'ra'.
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I'm starting to worry about my mount I've got a quite significant wiggle in the RA axis when the mount is powered off in it's parked position (clutches locked of course). Before I embark on a full strip down following Atrobaby's guide I thought it would be worth asking if anyone had suggestions for a less drastic investigation / fix? I'm not sure how recently this issue has come up, I've only just become aware of it after an equipment upgrade. I've just replaced my guiding setup of a 50mm finder coupled with an SPC900 webcam, to a Celestron 70mm TravelScope with a Touptek Mono guider. When I made this change my guiding went to hell, with a crazy amount of oscillation on the RA axis, which is what led to to start looking for flexure etc. and thus I found the RA axis slop... Now I understand that my new guiding setup has a much tighter FOV, and therefore will make the guiding errors look more pronounced than I am used to with the finder guider setup, but still I'm getting graphs with massive errors and corrections, sometime 2-3 pixels worth of motion. The DEC axis looks ok, but RA is all over the place, and I wonder if it's down to this wiggle? I've tried adjusting the balance so that the mount is at least always working on one direction, but that didn't appear to help much last night. So can anyone offer me some advice? Thanks in advance
Hi, As my GoTo is successfully finished (some cosmetic issues remain) I shoud focus my attention on planets' positions. I have proper source of information: fantastic book "Astronomical Algorithms" by Jean Meeus, thus I will sort the planets soon. But planets are not a challenge for me at this moment, they are just something obvious to do in my list. I have another idea and ambitious plan for next project within the year: locating and tracking the ISS to be able to make a video of its fly, not only transition. Similarly to other objects, I need some equations. I'm pretty sure they are available somewhere, because plenty websites or apps offer showing current position of the ISS. I will use this topic for sharing a progress ot the project.
I have a Nexstar+ handset on my AVX and despite reading the manual and scrolling through the options; I cannot find where to search by entering RA & Dec on the handset. Mostly I have been using the Deepsky and Stars sub headings to enter SAO, search Messiers etc but can't find search by RA & Dec can you help please? I can see that you can enter and save targets in User objects by entering and saving RA & Dec... It could be me suffering a sleepy head??
Hi, I'm trying to figure out what is the difference between RA, DEC vs Azimuth, Altitude difference. I watched dozens of videos and read a lot of material and I think I got it all mixed now.:) From what I understand, if I want to find a star using let's say a telescope than I would need to know RA and DEC which I can get from an app or a chart. (Is there a professional way?) But if I want to point at a star as an observer than I would use an Azimuth and Altitude?
I recently stripped and reset the RA axis worm of my HEQ5-PRO mount. Asfter a fall in 2014 it has developed a lot of backlash and it was only recently i referred astro-baby's tutorial and reset the worm. The shake is gone now, but the RA axis is so tight even hen the clutch is loosened that I am unable to balance the scope well. Any advice in this regard will be appreciated.