Rosette nebula - Altair Quadband.

[smerral]

The Rosette nebula, imaged with the Altair Astro 60 EDF, Starlight Xpress SXVR H9-C and Altair Quadband filter. 9x300 secs + 11x600 secs.

""The Rosette Nebula is a large spherical H II region (circular in appearance) located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.

The cluster and nebula lie at a distance of some 5,000 light-years from Earth and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.

A survey of the nebula with the Chandra X-ray Observatory has revealed the presence of numerous new-born stars inside optical Rosette Nebula and studded within a dense molecular cloud. Altogether, approximately 2500 young stars lie in this star-forming complex, including the massive O-type stars HD 46223 and HD 46150, which are primarily responsible for blowing the ionized bubble. Most of the ongoing star-formation activity is occurring in the dense molecular cloud to the south east of the bubble.

A diffuse X-ray glow is also seen between the stars in the bubble, which has been attributed to a super-hot plasma with temperatures ranging from 1 to 10 million Kelvin. This is significantly hotter than the 10,000 K plasmas seen in HII regions, and is likely attributed to the shock-heated winds from the massive O-type stars."

[Ciaran Meier]

Just wow !!!

You getting observation slots on the HST 😀 ?

Nice summary of the astrophysics too. 

Edited February 26, 2020 by Ciaran Meier
Update.

[smerral]

Thanks for the comments.

[Tangoringo]

Wow. Nice work and its great to see what is possible with the new tri/quad band filters. Great stuff.

Only comment is it may be worth cropping the L and R edges a tad as there seems to be an unmasked area or just an area which has had different processing from the rest. ( I say this as a complete newb so take it with a pinch of salt. I'd be over the moon producing an image like that.

[MartinB]

That's a very nice Rosette and great to see an H9 being put to good use.  A mono H9 was my first CCD about 13 years ago.

[uhb1966]

Hi Smerral, again a super work!  Thinking about the same filter. But you have a Bortle 2 sky and i have Bortle 4, so not sure whether that filter would work well for me...

Anyway, love your work !! Best, U.