Advice for beginner AP

Here is the place to talk about all those equipment(Telescope, Mounts, Eyepieces, etc...) you have. Not sure which scope/eyepiece is best for you? Trash it out here!
Post Reply
User avatar
Enterprise
Posts: 89
Joined: Sat May 26, 2007 3:05 am
Location: Singapore, Marine Parade (ECP)

Post by Enterprise »

orly, i meant the goto alignment (using 3 star align) not accurate, so the computer itself would have an error in what it thinks is "north" and so maintaining an error in its motor when tracking
Top
User avatar
weixing
Super Moderator
Posts: 4708
Joined: Wed Oct 01, 2003 12:22 am
Favourite scope: Vixen R200SS & Celestron 6" F5 Achro Refractor
Location: (Tampines) Earth of Solar System in Orion Arm of Milky Way Galaxy in Local Group Galaxies Cluster

Post by weixing »

Hi,
Enterprise wrote:orly, i meant the goto alignment (using 3 star align) not accurate, so the computer itself would have an error in what it thinks is "north" and so maintaining an error in its motor when trcking
May be you can post a image of the star trails.

Anyway, I guess it's might be a combination of field rotation and inaccurate tracking... any slight error in tracking will show up quite easily when imaging at 1500mm.

By the way, if your image show a circular movement of stars around the center of your object, then it's cause by field rotation.

Have a nice day.
Yang Weixing
:mrgreen: "The universe is composed mainly of hydrogen and ignorance." :mrgreen:
Top
Post Reply

Return to “Equipment Discussions”