guiding

[muletopia (Chris)]

This is my second post in this area. In the first Raymo correctly pointed out that I needed to improve my guiding, so I have been working on this.
Last night in an hour gap between clouds and with good seeing I tried guiding in the region of Canopus.
Attached is a screen dump of phd's history.
The bright star in the Phd2 screen is Canopus.
The mount is a heq5-pro.
The guiding is off axis using a Orion thin off axis guider holding a Canon eos 60Da
at prime focus on my Mewlon 210. The guide camera is a ZWO asi120mm with 2X2 binning set in phd.
The balance is set a little east heavy and north heavy.

I have yet to try phd's guiding assistant.

Suggestions please.

Chris

[Merlin66 (Ken)]

Looks pretty good.
How did the final image turn out? That's always the key question......

[kens (Ken)]

It looks too good to be true. Can you post the guide log? I suspect you are guiding on a hot pixel.
Why? The profile shows FWHM of 1.01 (i.e almost exactly one pixel), it has a peak value of 255 yet the star is not saturated, the guide RMS is close to 0.1 which is the limit of guiding precision, you have an exposure time of 1.5s so you would expect to see more movement from seeing, and there is a continuous stream of dec pulses.

It could be something else but it looks, walks and quacks like a hot pixel.

[muletopia (Chris)]

Thanks Ken,
I thought it looked too good to be true. Ah well, more to try.
At least the oag does show real stars as well, here and many in other parts of the sky.

Chris

[jenchris (Jennifer)]

I was going to go wow... not even any pe...
But that reminds me of my graph from a couple of weeks ago. Did the same thing and got stars so oval after three minutes that I thought the earth had sped up.