Pulse guiding test

[JohnP]

Quick test of pulse guiding with EQMOd - only 180 sec exposures but seem to work OK. NGC457 is quite a nice cluster (looks good in colour) - aka Owl cluster...

[The Thing]

Looking good John.

[Mike]

Nice round stars. Looking good.

[JohnP]

Cheers Dunc, Mike.

Nice round stars

... Not perfect but good enough for me...

[RobertM]

Cheers Dunc, Mike.

Nice round stars

... Not perfect but good enough for me...

Not too shabby eh John

Is it my eyes or does the collimation need tweeking a tad ?

Robert

[JohnP]

Well its an ED80 so not sure how I would do that...

[MarkS]

No it's not collimation it's a guiding issue.

If the RMS guiding error in the DEC direction doesn't match the RMS guiding error in the RA direction then you will get elongated stars.  The stars in this NGC457 image are uniformly elongated right across the FOV.

Mark

[JohnP]

cheers Mark - Looks like I will need to play with settings for pulse guiding then... John

[MarkS]

PHD2 reports the guiding error in both the RA and DEC directions.

[JohnP]

just downloaded it.. Out of interest is PHD2 the same as PHD v1.14..? I can't find any reference to PHD2...? John

[MarkS]

Try here:
http://www.daddog.com/phd2

[JohnP]

cheers mark now downloaded..