RA/DEC J2000?

Dshankar

Hey everyone!

When manually entering RA/DEC coordinates in the imaging UI, should I be using J2000 coordinates or the date coordinates? They are slightly different. I've had some difficulty with this and ended up cropping out the coma of C/2021 A1 Leonard.

Speaking of which, if anyone has data of Comet Leonard from December 31st, I would greatly appreciate it in order to create a mosaic. I'm uploading my RGB data right now under a Creative Commons license if anyone else wishes to use it (will share a Dropbox link soon)

Thanks,
Darshan

lukas_demetz

We use J200 RA/DEC coordinates 🙂

Dshankar

Here's 6 minutes of RGB data from December 31st, CC-BY license.
https://www.dropbox.com/sh/zhlo0pqwrnn5pzy/AAAhJ9qoiwXfcm0Cg2lnDmBxa?dl=0

My previous request still stands, if anyone has data from December 31st of the comet head they can share for a mosaic 😅