TheSkySearchers

Entered coords from SS, so I expected this to be center field. Not sure if I made an entry error if SLOOH was off a tad. This one I've viewed visually at home with my fracs.

The centering problem might be related to J2000 vs. Jnow. That is roughly the magnitude of offset you would expect from that. Coordinates from an atlas or database will be J2000. Actual coordinates in the sky are always Jnow. Coordinates from software could be either.

Nice cluster, regardless!

KathyNS wrote: ↑Sat Sep 11, 2021 11:18 pm The centering problem might be related to J2000 vs. Jnow. That is roughly the magnitude of offset you would expect from that. Coordinates from an atlas or database will be J2000. Actual coordinates in the sky are always Jnow. Coordinates from software could be either.

Nice cluster, regardless!

Exactly so.... on both counts.

Unfortunate they did not include the cascade.

Kemble 1/ NGC 1502 is one of my favorites

Lady Fraktor wrote: ↑Sun Sep 12, 2021 2:58 am Unfortunate they did not include the cascade.

Kemble 1/ NGC 1502 is one of my favorites

Yeah, I'll check J2000 vs Jnow to center and also see if I can nudge the FOV a bit to get at least some of the cascade.

Addendum: I checked the coords I entered and I had used J2021.7 from SkySafari. The J2000 from DSS are 2-3 minutes / arc minutes different. For an experiment, I'm going to try the same scope and DSS coords. Hold my beer...

Well now, well now... I tried NGC 1502 again using the same scopes - Canary 2 Wide Field and Ultra Wide Field - but coords from the DSS SIMBAD coord finder.

I have seen that often, especially with Canary One, the objects often are low in the fields.

I also sometimes make mistakes when I enter coordinates, ex. 45.5 minutes I put in as 45 minutes 30 seconds not sure if that is right

Ben Cartwright SASS wrote: ↑Thu Sep 16, 2021 12:42 pm I have seen that often, especially with Canary One, the objects often are low in the fields.

30 arcseconds is half of an arcminute, so 0.5 would be correct. I'm using DSS to get coords now:

https://archive.stsci.edu/cgi-bin/dss_form

Enter the object name, hit "GET COORDINATES", and the coords show below on the RA and Dec line. I sometimes retrieve a DSS image just to compare to SLOOH.

I can't use that for many of the objects I am trying to image for the Planetary Nebula program at the Astronomical League
Objects like

J320
Jonckheere 900
M1-7
JnEr1
etc