M33 - LRGB + SHO (LRGB overlay and other combinations in the revisions) (Timothy Martin)

M33 - LRGB + SHO (LRGB overlay and other combinations in the revisions)

Revision title: LRGB+HOO

Having seen some hints about this from others that there is a good bit of narrowband data accessible in M33, I decided to go deep on a data set that would include traditional LRGB as well as all three major narrowband ranges. For a galaxy that is half the size of our own, M33 contains some absolutely gigantic emission nebulas. Others may have done this, but I've never seen it before: treating it like a combined broadband-narrowband object. So I shot a ton of both kinds of data. The result that I think conveys the most information about M33, and one I've personally never seen before, is the one that combines LRGB and SHO. But I've also processed and posted a number of variations in the revisions that include the following:

B. LRGB
C. LRGBHa
D. HOO only (an interesting result that omits the broadband data entirely)
E. LRGB+HOO
F. Foraxx only (also no broadband data)
G. LRGB+Foraxx
H. SHO only (again, no broadband)
I. LRGB+SHO (the main posted image)

M33 is a freaky star factory producing ten times as many new stars each year as the Andromeda galaxy (M31), which is at least four times its size. When you see all these emission nebulas isolated, you can understand why that is.

This image (set of images, really) was a joy to capture and process. Having a wonderful remote scope like the TOA130 under a dark sky has been a godsend--and I'm only just getting started. One of the most fun things about capturing this image is that I did a great deal of it while traveling to Sweden to visit my daughter, who lives just outside Stockholm. I was actually able to control the scope while 40,000ft over the Atlantic ocean as well as on subsequent nights from her house in Tyreso. Astrophotography is one helluvan international effort!

C

Title: LRGBHa

Uploaded: ...

D

Title: HOO Only

Uploaded: ...

E

Title: LRGB+HOO

Uploaded: ...

F

Title: Foraxx Only

Uploaded: ...

G

Title: LRGB + Foraxx

Uploaded: ...

H

Title: SHO Only

Uploaded: ...

I

Title: LRGB + SHO

Description: Standard LRGB is the mouseover image

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	8577129
PixInsight job	BKG23MC8CUW4W5CEVLVVV1QXVJTRNXAW
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m59s.323
RA (top/left)	01h36m22s.592
RA (top/right)	01h36m28s.210
RA (bottom/right)	01h31m33s.209
RA (bottom/left)	01h31m33s.380

Dec (center)	+30°39′40″.60
Dec (top/left)	+29°43′54″.46
Dec (top/right)	+31°34′48″.20
Dec (bottom/right)	+31°35′08″.38
Dec (bottom/left)	+29°44′12″.00

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