Three clusters in Gemini.
NGC2158 was once thought to be a globular cluster. It is now known to be an intermediate-age, metal-poor open cluster that is a member of the old thin disk population. Est 2billion years old!
Any other open cluster older than this?
Medium-wide fields 2020
Re: Medium-wide fields 2020
Andromeda galaxy
Big mistake not dithering the subexposures -- terrible walking noise patterns in the end.
Big mistake not dithering the subexposures -- terrible walking noise patterns in the end.
Last edited by hhzhang on Sat Nov 14, 2020 2:02 pm, edited 2 times in total.
Re: Medium-wide fields 2020
M34
Last edited by hhzhang on Sat Nov 14, 2020 2:03 pm, edited 1 time in total.
Re: Medium-wide fields 2020
The two clusters.
Last edited by hhzhang on Sat Nov 14, 2020 2:04 pm, edited 1 time in total.
Re: Medium-wide fields 2020
M103 and neighouring clusters.
Last edited by hhzhang on Sat Nov 14, 2020 2:04 pm, edited 1 time in total.
-
- Posts: 113
- Joined: Sun Jan 12, 2020 2:30 pm
Re: Medium-wide fields 2020
Looked like both of us were doing the same thing last night!
Very nice pics from last night, especially M45 and the hyades cluster. Great work!
Very nice pics from last night, especially M45 and the hyades cluster. Great work!
Re: Medium-wide fields 2020
I was indeed hesite to go out to shoot, coz very tired after a days work.celeron787 wrote: ↑Sat Nov 14, 2020 8:50 am Looked like both of us were doing the same thing last night!
Very nice pics from last night, especially M45 and the hyades cluster. Great work!
But the clear skies were not to miss.
Back home processing the sub exposures and found out I made a mistake. I should have used dithering (either manual or auto) to mitigate the terrible walking noise patterns from my poor M50 mirrorless cam. Or I should have used my cooled astro cam.
Need to rework the post processing if I get another chance to shoot. Or just move on to other targets and come back to these few for a revenge at some true dark site when the borders open next year.
-
- Posts: 113
- Joined: Sun Jan 12, 2020 2:30 pm
Re: Medium-wide fields 2020
Yea walking noise is so terrible, kinda destroys the image making all that time spend wasted. I learnt that I rather spend a bit of time doing manual dithering and lose out a few subs than having that walking noise in the image.hhzhang wrote: ↑Sat Nov 14, 2020 1:41 pm I was indeed hesite to go out to shoot, coz very tired after a days work.
But the clear skies were not to miss.
Back home processing the sub exposures and found out I made a mistake. I should have used dithering (either manual or auto) to mitigate the terrible walking noise patterns from my poor M50 mirrorless cam. Or I should have used my cooled astro cam.
Need to rework the post processing if I get another chance to shoot. Or just move on to other targets and come back to these few for a revenge at some true dark site when the borders open next year.
Re: Medium-wide fields 2020
Clear skies but under full moon.
NGC55, a bright irregular galaxy
NGC55, a bright irregular galaxy
Re: Medium-wide fields 2020
NGC253. a nearby galaxy yet difficult for the small refractor while the target was behind a slightly hazy sky