An amazing star forming region (Sh2-140, HaRGB) (Massimo Di Fusco)

An amazing star forming region (Sh2-140, HaRGB)

I had started to image this nebula entirely in narrowband because I was convinced that it was a purely H-alpha emission region but then, going to look for information, I discovered that there is also a strong reflection dominant in this area of Cepheus, for where I had to review the initial project and start working on broadband. I managed to collect almost 30 hours of shots and what came out is this HaRGB composition that satisfies me a lot for once.

Sh2-140 is a mixed emission/reflection nebula that is part of the large star-forming region of the Cepheus Molecular Nebula Complex. It is located on the southwestern edge of the dark nebula LDN 1204, in the Cepheus Bubble, at a distance of about 2900 light years from us and the star responsible for the ionization of the nebula's gases is HD 211880, a blue star on the main sequence.
Several multi-wavelength observations were conducted on this nebula, centered mainly in the bright region on the edge of Lynds 1204 and on the infrared sources located behind it. The observations across the entire infrared band were conducted mainly with the aim of identifying any young stars present in the region; following these studies, a first catalog was drawn up including all the young stellar objects of Sh2-140, consisting of three infrared sources, IRS 1, IRS 2 and IRS 3, to which two other sources discovered later were added.

FriendlyCosmos
Processed with Photoshop
Deep Sky Northern Hemisphere
Suburban Astrophotography
Player One Poseidon-C
PixInsight Addicts
Broadband under Bortle 7/8/9
Duo-band, Tri-band, and Quad-band Imaging
Cloudy Nights
Sharpless2 Objects
Optolong L-Quad Enhance Filter
Player One Astronomy Cameras
CMOS Imagers
Imaged with N.I.N.A.
N.I.N.A. Users
AstroWorld TV
From Italy 🇮🇹
StarTools
The OSC Club (One Shot Camera)
Musical Imagers
Optolong L-Ultimate filter
AstroBin Platform open discussions community forum
3nm Narrowbanding filters
/r/astrophotography
Fast Newtonians
Nebula Photos Monthly Challenge
vdB Reflection Nebula
Cooled Color Cams
Dark Nebula
Light Polluted skies
Image the Universe
AAA : Astronomes et Astrographes Amateurs
Astrophotography from home
Beginners AP
Imagers of Italy
Narrowband imaging
Incredibles Universe
Constructive Critique Requested
Unique or Unusal Deep Sky Targets
Fine Art Astrophotography

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	10099865
PixInsight job	NSBI58CSYSSTI4NVY3EBQKRNSOB830YO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h17m41s.805
RA (top/left)	22h11m51s.979
RA (top/right)	22h23m34s.900
RA (bottom/right)	22h23m42s.267
RA (bottom/left)	22h11m38s.258

Dec (center)	+63°05′42″.54
Dec (top/left)	+62°38′25″.73
Dec (top/right)	+62°38′52″.91
Dec (bottom/right)	+63°32′02″.32
Dec (bottom/left)	+63°31′34″.91

Image Index:

Contribution Index (beta):