Rosette Nebula close-up (NGC2237) in Hα

The Rosette Nebula (also known as Caldwell 49) 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 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. (Wikipedia)

www.astrobin.com/345143/

Technical card
Imaging telescope or lens:Altair Astro RC250-TT 10" RC Truss Tube

Imaging camera:ZWO ASI1600MM-Cool

Mount:Skywatcher AZ EQ-6 GT

Guiding telescope or lens:Celestron OAG Deluxe

Guiding camera:QHYCCD QHY5III174

Focal reducer:Astro-Physics CCDT67 – 0.67x Reducer

Software:Main Sequence Software Seqence Generator Pro, Pleiades Astrophoto PixInsight

Filter:Optolong Ha 7nm 36mm

Accessories:MoonLite CSL 2.5" Focuser with High Res Stepper Motor, ZWO EFW

Resolution: 4656×3520

Dates: Jan. 11, 2018, Jan. 12, 2018

Frames: Optolong Ha 7nm 36mm: 18×600" (gain: 75.00) -20C bin 1×1

Integration: 3.0 hours

Avg. Moon age: 24.98 days

Avg. Moon phase: 21.82%

Astrometry.net job: 2043011

RA center: 97.722 degrees

DEC center: 5.049 degrees

Pixel scale: 0.538 arcsec/pixel

Orientation: 87.312 degrees

Field radius: 0.436 degrees

Locations: Berga Resort, Berga, Barcelona, Spain

via Flickr https://flic.kr/p/26PXf1a