M51 in Ursa Major is the first galaxy for which a spiral structure was detected. William Parsons, the 3rd Earl of Rosse, observed and sketched M51's spiral arms using his 72" telescope in Ireland. M51 tidally interacts with an adjacent smaller companion galaxy, NGC 5194, creating the extended area of brightness you can see below and to the right of the galaxy pair.

Telescope: Celestron EdgeHD 8"

Reducer: 0.7x (1440mm Focal Length)

Camera: QSI 683wsg

Filters: Baader RGB-CCD + UV/IR Cut

Mount: Astro-Physics Mach1 GTO

Integration: 40-50 mins each LRGB (5 min subframes)

Processing Software: PixInsight v1.8

IC 443 also known as the Jellyfish Nebula is a supernova remnant (SNR) in the constellation of Gemini. Its distance is approximately 5,000 light years from Earth and a diameter of 70 light years. This image has been processed in the style of the Hubble pallete using two narrow band 3nm filters of Ha and Oiii. This helps to separate the two gasses from each other.

Location: Gergal, Spain - January 2023

Scope: William Optics GT81 385mm

Camera: ZWO ASI2600MC Pro

Mount: Celestron CGX

Filter: Optolong L-Ultimate Dual 3nm Narrow Band

Subframes: 90 x 600s

Integration: 15 hours

Venice, Italy

M51, also known as the Whirlpool Galaxy, is a spiral galaxy located in the constellation Canes Venatici. It is approximately 23 million light-years away from Earth and has a diameter of about 100,000 light-years. The galaxy is named after its distinctive spiral arms that resemble a whirlpool.

M51 is a popular target for astronomers and amateur stargazers due to its brightness and proximity to Earth. It is also a prime example of a grand design spiral galaxy, with well-defined spiral arms that are thought to be caused by density waves in the galaxy's disk.

The Whirlpool Galaxy is also notable for its interaction with a smaller companion galaxy, NGC 5195. The two galaxies are connected by a bridge of gas and dust, and their gravitational interaction has caused a burst of star formation in the Whirlpool Galaxy's outer regions.

AQUISITION:

Telescope: SkyWatcher Esprit 120

Camera: QHY268MM

Filters: Astronomik Deep Sky LRGB-Ha

SUBFRAMES:

Lum: 236 x 120"

Red: 74 x 300"

Green: 60 x 300"

Blue: 60 x 300"

Hydrogen Alpha: 60 x 300"

Total exposure time: 39 hrs

Taken between March & May 2023

IMG_5191

This was a tough shot to get. Between light pollution, moonlight, and clouds moving in and out not in accordance to the weather forecast I felt lucky to be able to pull any kind of image from the data. Still I like the painterly quality it has taken on. More like something Whistler would have painted in a nocturne when he was painting his mother.

Dwarf III - 236 30-second subframes. Gain 30. Duo band filter.

1,100 ten second subframes

Seestar S50

Prague, Czech Republic

Inside an old shelter

#FlckrFriday

#542

This week's FlickrFriday theme is: #Subframing

Le thème de ce FlickrFriday est: #Sous-ossature

O tema desta FlickrFriday é: #Sub-enquadramento

本次 FlickrFriday 主題: #子框架

FlickrFriday-Thema der Woche: #Unterrahmen

El tema de FlickrFriday es: #Sub-encuadre

Prague, Czech Republic

The nebula is located just to the south of Alnitak, the easternmost star of Orion's Belt, in the Orion constellation.

The Horsehead Nebula is approximately at 1400 light-years from Earth.

This is a two panel mozaic

Pre process : flic.kr/p/2mZk6WG

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -25°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optrolong L-eXtreme

-Acquisition-

Light : Panel 1-41x300s / Panel 2-36x300s

Total integration time 6,5h

Dark-100x300s Flat-50 Bias-100

Date : 25,24 January 2022

Location : France-Alsace Bortle 4/5

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

-Pre Processing each panels in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Dynamic crop

-Processing

DBE master Light

Split L,R,G,B layer from Master light

__L__

Ez_Deconvolution

Ez_Denoise

Ez_Soft Streatch

UnsharpedMask

LocalHistogramEqualization

__RGB__

Linear Fit

BackgroundNeutralization

PhotometricColorCalibration

Ez_Soft Streatch

Starnet++

CuvesTransformation with mask

SCNR star mask

Bring back stars with PixelMath

__LRGB__

LRGBCombination

Final CurvesTransformation

DarkStructureEnhance Script

Save as jpg

Clear Skies !

IC 405 also known as the Flaming Star Nebula, SH 2-229, or Caldwell 31,

Seestar S50. This is a composite of 567 ten-second exposures (subframes). Taken January 26, 2025.

My trusty, old 5D III showed up as a model for this shoot.

NGC 6995 also know as the Eastern Veil is a part of the Cygnus Loop, a large supernova remnant in the constellation Cygnus.

She is located around 2500 light-years.

Personally i see the face of the Joker 😄

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -5°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optolong L-eXtreme

-Acquisition-

Light : 128x300s

Total integration time 10,6h

Dark: 100x300s Flat-50 Bias-100

Date : 20,21,23,24,25 August 2022

Location : France-Alsace Bortle 4/5

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

Dynamic crop

-Processing

DBE MasterLRGB

___RGB layer___HOO

Split RGB channels to build Ha and Oiii

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

___L layer___

Ez_Deconvolution

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

UnsharpedMask with nebula mask

___LRGB___

Ez_Denoise

Curve Transformation

Annotation

Save as PNG

Clear skies !

Planetary nebula HFG1 (PK 136+05)

HFG1 is an old, faint, and thus rarely imaged planetary nebula in Cassiopeia. Its most distinctive feature, the blue bowshock, results from this ball of expanding gas bowling through the interstellar medium at between 29 and 59 kilometers per second, leaving behind a trail of gasses. A planetary nebula forms when a sunlike star reaches the advanced age where it first becomes a bloated red giant star, and then throws off the star’s outer shell of gasses when the core collapses to form a white dwarf star. In the case of HFG1, the central white dwarf star V664 Cas is accompanied by a smaller star that is so close it completes each orbit in only about 14 hours. HFG has expanded for approximately 10,000 years, to the point where the nebula is about one lightyear across.

Telescope: .5 meter Planewave CDK20 telescope

Camera: FLI PL9000 monochrome camera

Location: Sierra Remote Observatories in California

Date: October 18 through November 10 of 2018

Exposure time: 48.5 hours of Hα data (97x 30min subframes), 36 hours of OIII (72x30min), and 5.7 hours combined for RGB (stars only). So total image exposure time is over 90 hours.

Processing: PixInsight and Photoshop

Note: This is a stacked single target image. Only the bad (overscan and alignment overlapped) edges of the frame were cropped out.

See on Fluidr

To see more of my work and to buy prints visit www.jklovelacephotography.com/pages/space

Here is comet in color , I found set of three RGB subframes 60 sec each and stack and processing in PI .Taken on Jan 20 , 2020 with SBIG ST-8300 CCD camera through TS 130 mm APO refractor working @ F/7 and Deep Sky Astronomik filters.

******************************************************************************

Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

* Temperature 17° C.

* Total exposure time: 6 minutes.

___________________________________________

Description:

High in the northern hemisphere summer sky our home galaxy, the Milky Way, runs through the constellations Cassiopeia (left side), Cepheus (centre) and Cygnus (right side).

This area of the sky is riddled with glowing red clouds of hydrogen gas, numerous star clusters, and areas of dark foreground gas that obscures the light of millions of stars beyond.

Just a little above and to the right of centre is the bright circular red gas cloud IC 1396. For a close-up view of this nebula made with a 400 mm lens in August 2015, click here:

www.flickr.com/photos/97587627@N06/19929294304

One of the most distinctive gas clouds is the aptly named "North America Nebula", at bottom right. For a close-up view of this nebula made with a 400 mm lens, click here:

www.flickr.com/photos/97587627@N06/19933485213

For a version of this photo WITHOUT labels, click on the LEFT side of your screen, or click here:

www.flickr.com/photos/97587627@N06/28165947613

___________________________________________

Technical information:

Sigma 50 mm f/1.4 DG HSM ART lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

Six stacked frames; each frame:

50 mm focal length

ISO 3200; 1 minute exposure at f/4; unguided

(with LENR - long exposure noise reduction)

Subframes registered in RegiStar;

Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance, colour desaturation)

******************************************************************************

Netherdale football stadium, architect Peter Womersley, Category A listed building

The photo is of the visitors at the Frido Kahlo exibition, as the title says, the slow shutter speed rendering the "abstraction"; the projected form on the wall, the red (pink) band and the moving darker forms of the visitors around the yellow form serving as frame in frame, or #subframing; with the projected colors amphasizing the red and the yellow, caught during exposure, among the many colors she used so skillfully.

Wide field view.

Dwarf III. 188 45-second subframes | Polar Alignment | Mosaic mode.

I decided to capture and add some Ha filtered subframes to my M78 from January 2015.

12/4/15

Ha- 9x300s

1/15/15

L- 9x300s

L- 24x60s

RGB- 10x60s

Celestron 11" Edge HD w/HyperStar(F/2)

QHY23M (cooled to -20C)

CGEM-DX

Adam, a sculpture on the left side of the entryway to the Rodin Museum, Benjamin Franklin Parkway, Philadelphia, Pennsylvania

NGC 6910 is an open star cluster set amidst clouds of gas and dust near the bright star Sadr in the constellation Cygnus.

Subframes for this image were accumulated over 4 different nights, some under dark skies near Goldendale, WA and others from within Seattle city limits. RGB data for the stars was combined with narrowband data for the gas and dust, with Ha assigned to R. In an effort to maintain a "natural" appearance, only modest amounts of SII and OIII data were added to the G and B channels, respectively.

Telescope: Celestron EdgeHD 8" with 0.7x Reducer

Camera: QSI 683wsg

Mount: Astro-Physics Mach1 GTO

Integration: 30 min (6 x 5 min) each RGB, binned 1x1 | 300 min (30 x 10 min) Ha, binned 1x1 | 100 min (10 x 10 min) SII, binned 2x2 | 120 min (12 x 10 min) OIII, binned 2x2.

******************************************************************************

Photographed at Algonquin Provincial Park, Ontario, Canada, between 21.46 and 22.03 EDT

(285 km by road north of Toronto)

* Temperature 15° C.

* Total exposure time: 6 minutes

* 20 mm lens

___________________________________________

130 degrees of the northern portion of our home galaxy, the Milky Way, and some 80,000 stars, are seen in this wide angle image, running from the constellation Cepheus at left, through Cygnus and Aquila, to Scutum at right. The Milky Way bulges noticeably at the right side, toward the centre of the galaxy in Sagittarius (out of view to the right).

A little left of and below centre is the shocking pink, distinctively-shaped North America Nebula in the constellation Cygnus. For a telephoto view of this nebula made with a 300 mm lens on the same night, click here:

www.flickr.com/photos/97587627@N06/29220929561

Just to the right of the North America Nebula lies a region of glowing red hydrogen gas surrounding the star Gamma Cygni. For a telephoto view of this region, click here:

www.flickr.com/photos/97587627@N06/27845511250

And near the left edge, just below centre, is a fainter circular area of glowing red hydrogen gas, called IC 1396. For a close-in view of this gas cloud, click here:

www.flickr.com/photos/97587627@N06/19929294304

___________________________________________

Sigma 20 mm f/1.4 ART lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

Six stacked frames; each frame:

20 mm focal length; ISO 2500; 60 seconds exposure at f/4

(with LENR - long exposure noise reduction)

Subframes stacked in RegiStar;

Processed in Photoshop CS6 (brightness, contrast, levels, colour balance)

******************************************************************************

A quote by Jung about exploring the Psyche.. I think it applied here too, at least it was in my head getting this view. Another trip to the river , its a long drive to this place and trying to time my original idea hasn't worked out in about just over a month.

Eight feet up a vertical rock wall to stand on a two foot square ledge with another sixty foot drop to the rocks and river below with a pack and heavy tripod. Thankfully the rocks have ledges that stick out and I could grab onto the trestle uprights to hold on once I got up there so this was from inside the trestle bridge, interestingly it was the last shot I took before I went to climb back down and leave.

Will I go back for the original shot... I don't know for now, maybe this is why I kept going back and just didn't know it. We'll see.

Nikon Nikkor 50mm 1.2 AIS.

Thanks for checking out my work...Appreciate all of you.

7 subframes (images) and 10 darks (for calibration). Stacked in Deep Sky Stacker and further processed in Photoshop to increase contrast.

Shot from the North-South Lake Campground, Catskills, NY.

Grupo de 7 fotos y 10 oscuras para calibrar. Procesadas en Deep Sky Stacker y Photoshop para mejor contraste.

Las saque en North-South Lake Campground, Catskills, Estado de New York.

M13 Great Globular Cluster in Hercules

Had a few cloudless hours to grab an easy target. It is the first DSO I have imaged since November. Either my sky conditions have really deteriorated since November or there were some high thin clouds. Either way it was good to give the gear a run.

I tried something different and shot 200 Luminance filter subframes only 5 seconds each. I combined this with some RGB I shot in 2013 from my QHY23M and AT65. The large number of subframes really seemed to produce a much cleaner image. In a few months when it is clear again I will give 100+ subs a try again

Telescope:11" Celestron EdgeHD w/Hyperstar(F2)

Camera:QHY163M

Mount: Orion HDX-110

Optolong LUM filter

Whitby, Yorkshire

Everybody's favorite. This version has plenty of space surrounding the galaxy and shows good detail.

Dwarf III | 200 fifteen-second subframes | gain: 60 | Astro filter | mosaic mode | Equatorial mount

Gerner exploring the nooks and crannies of Burano

M17 to M16 The Swan and Eagle Nebulas

Taken on 9/5/16, I was going to add more subframes but I decided move on to other targets. Only 4 exposures, 20 minutes long.

No flats or bias and only 6 dark frames used

QHY10 One-Shot color

AstroTech AT65EDQ

Orion Sirius Mount(on pier)

Flickr Friday: Subframing

Explored at No. 122, 25 July 2023

At the center of this image is M 100, a face-on spiral that is part of the Virgo Cluster of galaxies. It is located in the constellation Coma Berenices. The distance to it is about 55 million light years -- the same as the rest of the Virgo Cluster. It is also known as NGC 4321.

To the right of it in this image (but south of it on the sky) is another spiral galaxy, NGC 4312. The Cosmicflows-2 catalog (Tully, et. al., 2013) puts the distance to this galaxy as 37.2 million light years -- significantly closer to us than M 100. It is also an edge-on galaxy, giving it a more flattened appearance.

This is a stack of 20 6 min exposures taken from my Bortle 8/9 backyard in Long Beach, CA. I used a Celestron Edge HD 925 at f/2.3 with Hyperstar lens and an Atik 314L+ color CCD camera with a Baader light pollution filter. Preprocessing of subframes in Nebulosity; registration, stacking, and processing in PixInsight; final touches in Photoshop.

Full Write-up here: theastroenthusiast.com/the-interacting-triplet-of-m81-m82...

This incredibly detailed image of the interacting triplet M81, M82, and NGC 3077 was created from more than 216 hours of exposure across three continents — Europe, USA, and Oceania. We combined 4019 subframes and 12993 minutes of exposure to reveal faint details previously masked by lower amounts of data. The high exposure time also allowed us to sharpen fine features, giving the image more contrast and revealing more fine structures.

On the top of the image lies NGC 3077, a small starburst dwarf galaxy with a starforming core. Below lies M81, a grand design spiral about 12 million light years away. To the right is M82, a starburst galaxy with a huge superwind triggered by interaction with M81 and NGC 3077. All around the image is the galactic cirrus, dust lit by the glow of the milky way. I highly recommend looking at the image with HI emission overlaid, which displays what of the background is neutral gas from the interactions and what is dust from the milky way.

Website: theastroenthusiast.com/

Instagram: www.instagram.com/the_astronomy_enthusiast/

This image shows two groups of galaxies. You might recognize Stephan's Quintet, the galaxies near the lower left corner, as the conversing angels in the movie “It’s a Wonderful Life”. 😀 The Deer Lick Group of galaxies, with NGC 7331 as its largest member, is near the upper right corner.

Telescope: Celestron Edge HD 8 at f/7

Camera: QSI 683wsg

Mount: Astro-Physics Mach 1 GTO

Integration: Approx 65 mins each of RGB (~13 x 5 minute subframes)

Processing Software: PixInsight v1.9, Adobe Photoshop

Captured under dark skies near Goldendale, WA.

Actually two interacting galaxies, it's the most irresistible spring imaging target. Here I have aimed for the best image I can do from my red zone location using my portable gear. We had 4 clear nights in a row and I used each one to collect 2 to 3 hours of decent data. All captures used 8 second exposures, albeit a buttload of them (where 1 buttload = 4,275 subframes).

Tech Stuff: Borg 71FL/TeleVue 2.0X PowerMate/QHY 166mono/ZWO LRGB filter set/iOptron CubePro unguided. Data collected with SharpCap in 6 minute LiveStacks with dark and flat subtraction L X 186 min; R X 162 min; G X 102 min; B X 120 min. Total 9.5 hours. Processed in PixInsight, GIMP, ACDSee. Collected April 5-9 2021 from my yard in Westchester, SQM-L 18.4-18.7 (Bortle 7 Suburban/Urban Transition sky).

Henry Curry built the Grade II-listed Pump Room for the 7th Duke of Devonshire in 1894 due to overcrowding at the previous well in the Natural Baths. It was last used to “take the waters” in the 1970s.

The Pump Room now houses the Buxton visitor centre.

Turner Motorsport team mechanic at the IMSA Northeast Grand Prix held at Lime Rock Park. Composed and submitted for FlickrFriday #subframing theme; not only is the subject framed within the frame, but the subframe is a car's frame!

This stack of 18 images contains nearly the entirety of the constellations Andromeda, Cassiopeia, and Perseus. Numerous outstanding objects are within its bounds. From left to right (roughly east to west), they include:

The Pleiades (M45, lower left corner)

The California Nebula (NGC 1499, above the Pleiades)

The Double Cluster in Perseus (NGC 869 and NGC 884, near top center)

The Heart and Soul Nebulae (IC 1805 and IC 1848, above the Double Cluster)

M34 (open star cluster, bottom center)

The Triangulum Galaxy (M33, along the bottom border, right of M34)

The Andromeda Galaxy (M31 and satellite galaxy M110, bright elongated object in lower right area of image)

Subframes were taken with an astrophotography modified Nikon D5100 at ISO 4000 and focal length of 18mm. Stacking and processing in PixInsight, with a few final touches in Photoshop.

The solution for the image from astrometry.net places the center at

RA 2h 3m

DEC +50° 20'

NGC 6979 also know as the Pickering's Tringle is a part of a larger nebula, the Cygnus Loop in the Cygnus constellation.

The Triangle is brightest along the northern side of the loop.

This supernova remnant is located around 2400 light-years.

Full resolution : flic.kr/p/2nxmK3E

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -5°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optolong L-eXtreme

-Acquisition-

Light : 76x300s

Total integration time 6,3h

Dark: 100x300s Flat-50 Bias-100

Date : 3,5,6,7,9 July 2022

Location : France-Alsace Bortle 4/5

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

Dynamic crop

-Processing

DBE MasterLRGB

___RGB layer___HOO

Split RGB channels to build Ha and Oiii

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

SCNR

Starnet++ build a mask nebula

Color Saturation

Curves Tansformation

___L layer___

Ez_Deconvolution

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

UnsharpedMask with nebula mask

___LRGB___

Ez_Denoise

Final Curve Transformation

Annotation

Dynamic Crop

Save as JPG

Clear skies !

The first visit to the Orion this season.

83 unguided 30s.LRGB subframes.

Mount: SW NEQ6 pro

Telescope: TS UNC 8" f/5

Cam: QSI 583wsg

Data collected from Bazaleti, Georgia on November 4, 2016.

processes in PixInsight, Adobe Lightroom and Photoshop.

NGC 6914 is a reflection nebula located approximately 6000 light-years away in the constellation of Cygnus.

+/- 3800 Stars in this picture

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -5°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optolong L-eXtreme

-Acquisition-

Light : 42x300s

Total integration time 3,5h

Dark: 100x300s Flat-50 Bias-100

Date : 28 April 2022

22 May 2022

Location : France-Alsace Bortle 4/5

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

Dynamic crop

-Processing

DBE MasterLRGB

___RGB layer___HOO

Split RGB channels to build Ha and Oiii

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

SCNR

Starnet++ build a mask nebula

Color Saturation

Curves Tansformation

___L layer___

Ez_Deconvolution

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

UnsharpedMask with nebula mask

___LRGB___

Ez_Denoise

Final Curve Transformation

Annotation

Save as JPG

Clear skies !

NGC 6820 is an emission nebula located 6000 light years away in the constellation Cygnus. This nebula is approximately 65 light years wide

Uncropped version : flic.kr/p/2nD9DFa

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -5°C gain 101 offset 49

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher AZ-EQ6

Filter: Optolong L-eXtreme

-Acquisition-

Light : 75x300s

Total integration time 6,3h

Dark: 100x300s Flat-50 Bias-100

Date : 7,8 August 2022

Location : France-Alsace Bortle 4/5

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight

Ez Processing Suite from darkarcon

darkarcon website : darkarchon.internet-box.ch:8443/

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Image Integration

Drizzle x2

Dynamic crop

-Processing

DBE MasterLRGB

___RGB layer___HOO

Split RGB channels to build Ha and Oiii

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

SCNR

___L layer___

Ez_Deconvolution

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

UnsharpedMask with nebula mask

___LRGB___

Ez_Denoise

Curve Transformation

Crop + Rotation

Annotation

Save as JPG

Clear skies !

A morning on the beach.