Re: Imaging during EST to DST change over


FYI we went through a time change in September (Chile) and our 1600 did not do anything unusual. It imaged the whole night and started up as expected the next day. I just had to review/adjust the start times for some targets

On Mon, Mar 15, 2021 at 8:42 AM Roland Christen via <> wrote:
The mount won't park itself unless it gets a park command from a 3rd party software. A clock change on your PC does not automatically get sent to the mount by itself, so the mount does not know about any time change.


-----Original Message-----
From: Jim Fakatselis <pashasdad@...>
To: <>
Sent: Sun, Mar 14, 2021 11:25 pm
Subject: [ap-gto] Imaging during EST to DST change over

Last night I was imaging with my QSI683 camera through the AP 130EDF on my Mach1GTO and had an unusual thing happen. I was on my last subframe of the evening, at around 2am and suddenly I noticed that the guiding errors grew tremendously.

I noticed the guide star was out of the field so I grabbed an additional full frame exposure through the guide camera to see what had happened. A 5 sec exposure showed stars streaking in the field of view, like the tracking was incorrect or even off.

After closer inspection I noticed that the mount parked itself at exactly 2:00am when the PC's clock automatically advanced from 2:00am to 3:00am during the EST to DST transition. It wasn't too much of a problem since I was closing down for the night anyway, so I lost the 10 min subframe.
I was wondering why/how the mount automatically parked due to that sudden time shift Any ideas? Anyone else had this happen to them?

Jim Fakatselis
Peppermill Skies Observatory
Huntington, NY

Roland Christen


Brian Valente

Join to automatically receive all group messages.