I read quite a lot of articles about how to align a telescope. However, sometimes I still feel hard to center a planet with my Celestron 8SE.
Sorry that I cannot upload too long videos, so let me use the screenshots to describe the issue.
Example 1: Jupiter
We can see the Jupiter's position slowly moved to the lower right in 5 mins.
Example 2: Saturn
The movement of Saturn in this example is more complex. It moved to the right from 00:00:00 to 00:01:30, then to the top from 00:01:30 to 00:03:20, finally to the top right from 00:03:20 to 00:05:20.
The movement is slow, so that if the video is in a few minutes, I can bear with it. But if I make consecutive videos, for example, take 5 videos for Saturn with each 3 mins long, the planet could go out of the scope. Notice that the direction of the movement is really unpredictable, it could go anywhere and could make turns, the moving speed is also quite random. If I am lucky sometimes, the planet could stay without any movement for a few minutes. It could stay for quite a long time and then start to move as well.
Is this movement normal or did I make something wrong?
I read through this article and was aware of some alignment tips: https://stargazerslo...g-how-to-align/
- I did OTA balancing instructed in the article
- I am sure the tripod is leveled
- I made the final movement up and right to reduce backlash
- I tried 3-star and 2-star alignment with and without using planets
- Power supply shouldn't be an issue since I connected to the outlet at home, adapter is 12v 5a
- I am using city database and time should be accurate
I've racked my brain and cannot come up with another idea to make the telescope more stable. Could anyone help?