NGC 5139 / Omega Centauri

cataclysm · Post by **cataclysm** » Thu May 05, 2011 2:01 pm

Here is an unfinished image from the recent Kahang trip, only managed to collect the Red data when the clouds set in. Nevertheless, I was very please the the results owing very much from the good tracking performance with the GM8 after a mechanical upgrade. Below is an image with full 100% pixel scale with 10 min subs, a feat that the mount could't perform b4 the upgrade.

Image with:
Losmandy GM8 with Gemini
Televue Genesis SDF ( imaging OTA )
Mini Borg ( Guide scope )
Meade DSI III pro ( modified with cooling )
SAC4-2 ( Guide Camera )
4x10 min sub

shirox · Post by **shirox** » Thu May 05, 2011 2:13 pm

chio!

Gary · Post by **Gary** » Thu May 05, 2011 2:20 pm

Great image and congrats on reaping the rewards of your upgrading.

timatworksg · Post by **timatworksg** » Thu May 05, 2011 6:46 pm

Great job cat! Pity the clouds rolled in on you guys there! Must have been one of those Awesome nights!! Nice resolution!

Post by **Airconvent** » Thu May 05, 2011 9:21 pm

Great details Kelvin but I noticed its oval in shape. is this its true form?
I've always thought it was round but then again, some astronomers believe it was once a dwarf galaxy like the SMC/LMC but had its outer layer of stars stripped clean by the milkyway. [smilie=bye2.gif]

cataclysm · Post by **cataclysm** » Fri May 06, 2011 12:47 am

Great details Kelvin but I noticed its oval in shape. is this its true form?

Good observation Richard, although NGC5139 isn't exactly round, but my image has a significant light fall-off on the right side, making it appearing even more oval I guess. This could be due partial obscuring on the filter due to condensation. On that night it was really wet, and I think my dry air pump is not up to the task. Prior to the red filter, I had also collected some luminence data with clear filter, and this did not exhibit the problem. The image of the luminence data is shown below:

Robin Lee · Post by **Robin Lee** » Fri May 06, 2011 11:31 am

Did the flat help to fix the variation in illumination?

Great pinpoint stars there!

wucheeyiun · Post by **wucheeyiun** » Fri May 06, 2011 12:57 pm

Wonderfully done, very pack with pin-pointed stars ...

Clifford60 · Post by **Clifford60** » Fri May 06, 2011 7:09 pm

Great picture always [smilie=good-job.gif]

Post by **rcj** » Fri May 06, 2011 9:06 pm

bloody goood! red one is better. lum must start to do masking if got shorter expos.