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M20 Trifid Nebula in LRGBHa

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IC443 Ha from Utah

Started by geomorph, 04/04/2005 02:18AM
Posted 04/04/2005 02:18AM Opening Post
Hi all. I imaged this one the same night as M3, but it took a while to do the processing. I still need more data to smooth things out, but it is a start. This is my first successful Ha imaging attempt. I used an Astronomik 15nm bandpass Ha filter with my ST2000XM on the Tak Sky90. This exposure is 40 minutes (4x10).

I am attaching a small thumbnail.... a larger image can be found at:

http://www.utahastronomy.com/album16/Utah_Astronomy_IC443_Ha_Lum?full=1

Cheers,
Tyler

Attached Image:

geomorph's attachment for post 23242

"The expression of the beautiful is in direct ratio to the power of perception acquired by the artist." (Gustave Courbet)
Posted 04/04/2005 01:32PM #1
Nice, Tyler! H-alpha processing is different from regular luminance or LRGB, isn't it? That constantly catches me by surprise.

Eric
Posted 04/04/2005 05:07PM #2
Excellent shot Tyler!
Nice job at showing the subtle details of the nebulosity...


Thank you! wink

Ivan Gastaldo 8)
Coconut Creek, FL

Ivan's Observatory
Lat 26N 16' 48" Long 80W 10' 48"
[COLOR="Red"]Personal Website:[/COLOR] http://www.ivangastaldo.com

CCD Imaging and Processing/Deep Sky - Moderator
I like to complain about everything - Moderator
Posted 04/04/2005 05:11PM #3
Cool! It looks like you had good tracking and the 15nm lets more stars through. I think it looks better. Propus always buggers up this object but it looks better in your shot than it does in my image of this object.

Great shot - Cal
Posted 04/04/2005 06:58PM #4
Nicely done, Tyler. The full size image looks good, too.

dan kowall
Posted 04/05/2005 03:27AM #5
Very nicely done Tyler. I just love what can be pulled out with HA. I think the wider HA bandwidth is a good choice.

Jim Thommes

Mak-Newt 152 mm
C8
Megrez II APO
Zenithstar 66 mm APO
G11/Gemini
ST8300M
Artemis285 Camera
Canon 350D DSLR

http://jthommes.com/Astro/
Posted 04/06/2005 05:34AM | Edited 04/06/2005 05:35AM #6
Very nice shot Tyler. You're in deep now smile. I use the same setup - ST2K and Astronomik. I've found that the longer the exposures the better. I normally shoot 900 ~ 1200 seconds in Ha now and I shoot at least 10 of those. That's where it starts paying off. Don't have to stretch as much and DDP works wonders. Remember Ha is really dim so it pays off to expose longer.

Best,

Jose Suro
Tierra Verde, Florida