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Comet ATLAS C/2019 Y4, discovered in December 2019, has been quickly increasing in brightness over the last few months, and many of us hope that trend will continue; past projections put it as reaching naked-eye brightness this April or May. However, it's brightness has recently plateaued around magnitude +8. That and an elongated nucleus suggest that it might be disintegrating.

 

It was likely about magnitude +8 when I photographed it last night, April 9th, near Star 42 Camelopardalis. I'm not sure what the faint nebulosity is to the lower left of the comet: either Dark Nebula HSVMT 25, integrated flux nebula (IFN), or it's simply an artifact. Galaxy NGC 2366 is also apparent in the upper right corner.

 

Acquisition details: Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 50 x 30 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker (used comet stacking mode so stars and comet were stacked separately and then combined), editing with Astro Pixel Processor and GIMP, taken in the 30 minute-window between astronomic dusk and the rise of the 93% illuminated moon on April 9, 2020 under Bortle 3/4 skies.

The 'W' of Cassiopeia has always been one of my favorite constellations - maybe because I could always spot it as a kid.

 

This extent contains the middle three stars of the 'W' - Ruchbah (blue, bottom), Navi (blue, upper left), and Shedar (yellow, upper right). The center star of the 'W', Navi, illuminates the Gamma Cassiopeiae Nebulae (IC 59 and IC 63) a combination of red emission and blue reflection nebulae. The red/pink emission nebula below Shedar is the Pacman Nebula (IC 11 or NGC 281). And to the right of Ruchbah is the Owl or E.T. Cluster (NGC 457); the owl or E.T. is upside down here.

 

Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 35 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken on Oct. 23, 2019 under Bortle 3/4 skies and thin cloud cover.

 

Thin cloud cover was present most of the time that I imaged and acted as a diffusion filter for the larger stars. I kind of like this effect that emphasizes big stars, especially for this extent where the nebulae are fairly small for a focal length of 135mm, although I'd always prefer clear skies to a natural diffusion filter. Even though my tracking was spot-on (good balance, polar alignment, and a charged SkyTracker), I wasn't able to use about half of my subs because of clouds.

M90 Galaxy found in the constellation of Virgo.

 

M: Pegasus NYX-101

T: WO GTF81 Refractor

C: ZWO ASI533MM-Cooled

G: OAG and PHD2

GC: ZWO ASI120MC

RAW16; FITs

Temp: -10 DegC

R: Gain 100; Exp: 10 x 300s

G: Gain 100; Exp: 6 x 300s

L: Gain 100; Exp: 10 x 300s

Frames: 26 Lights; Darks/DarkFlats/Flats

Total Exposure: ~2.17 hours

50% Crop

Capture: NINA

Processed: APP LRG[No 'B']; PS.

Sky: 90% moon, no breeze, no cloud.

Very weak and identified in 1954 on photographic Plates as a Milkyway satellite.

 

Esprit 100 f5.5 APO/Qhy16200 CCD @-20C.

98x300 sec IDAS-LP2 filter.

Imaged on: 13,14,15&16 May, 2018.

 

Knight Observatory, Tomar

 

en.wikipedia.org/wiki/Draco_Dwarf

M101 Pinwheel Galaxy

 

Equipment:

Celestron AVX

Baader Moon and Sky Glow with IR cut filter

ES ED 102 FCD 100 Scope

SSAG Cope and Camera

ZWO 183mc Pro

Pegasus Focus Cube

 

Software:

SGP Acquisition

Sharp Cap - Initial Focus and Polar Align

AstropixelProcessor for stacking and initial stretch

Finished in Photoshop

 

I'll have to look to see how much integration.

 

www.instagram.com/llmarshallart/

www.facebook.com/llmarshallart

Bortle 4.6 Location

 

Alt-az

 

10 second subs

347 subs

 

Stacked in AstroPixelProcessor, processed in PixInsight

  

imaged in July 2024 from Linden, Blue Mountains, Australia

The Theta Musca Supernova Remnanant-G304.4-3.1

 

this is a recently discovered SNR (first imaged in high resolution just over a year ago by Bray Falls)

  

The object is huge and too big for the small sensor of my imaging camera, so I will have to re-attempt with possibly my RedCat51 at some future point in time.

 

Equipment

HEQ5/ASIAIR/Sharpstar Z4/Antlia 3 nm Ha Filter/Optolong 3nm OIII filter/ZWO ASI533MM Pro

 

Integration

16 hours in OIII (10 minute subs)

4 hours in Ha ( 10 minute subs)

 

Location

 

Bortle 6

 

imaged over multiple nights in July 2024

 

Processing notes

 

Ha and OIII data stacked in AstroPixelProcessor.

Ha and OII integrations registered in APP.

 

Processed in PixInsight

 

Dynamic Crop

 

Graxpert for gradient removal (for some reason GraXpert did a better job IMHO than my usual goto ADBE )

 

BlurX-correct

BlurX default

 

Starnet++

 

SetiAstro NB to RGB script to convert Ha and OII star masks to star layer -only mild stretch (4.0) applied

 

NoiseX on starless images

 

GHS for starless layer. Had to experiment to not overstretch the data especially Ha and swamp the image with ha signal

 

Linear Fit

 

HOO image constructed with PixelMath

Red- Ha

Green- 0.2 Ha +0.8 OIII

Blue-OIII

 

mild curves transformation

 

star layer added using Pixelmath

 

Narrowband Normalisation

BlurX

NoiseX

 

levels adjustment in Photoshop CS

 

Comment

 

Images published on the web tend to show the oxygen areas in an electric blue and the Ha areas in a hue closer to pink

 

while it was possible to achieve this colour palette by using adjustment layers (Hue/Saturation, colourise) I have chosen to go with the image more or less as it emerged from PixInsight

   

IC443, the Jellyfish Nebula on the right is the remnant of a Supernova that occured around 10.000 years ago. A (the?) resulting rapidly spinning Neutron star or pulsar CXOU J061705.3+222127 is found today at the indicated location. The nebula to the left is IC444. This image in H Alpha light was made with an Esprit100 f5.5 refractor/ QHY16200 CCD camera (cooled to -20C). 35 x 15 minutes (8.8 hrs), integrated with Astro Pixel processor and processed further with Pixinsight. Image dates: 6,7,9 and 10 November 2017.

 

Info about the Pulsar: www.space.com/31442-jellyfish-nebula-mysterious-pulsar-im...

 

Knight Observatory, Tomar

  

 

D5300 - unmodded

300mm f/2.8 AF-S

SW HEQ5

Captured with APT, Processed in APP, Gimp

10 - Lights, 90sec, ISO400, f/4

10 - Darks

10 - Flats

10 - Bias

71x300s, gain 150, -10C, H-alpha

NGC 7822 is a beautiful emission nebula in Cepheus, well-known and popular for its shape and the dark nebulae running through it.

Thanks to good weather three weeks ago, I was able to collect 17.5 hours of data at f/2 for this SHO version. When it comes to color, I like the classic processing in the style of the Hubble Telescope, but this slightly more modern color scheme also has its charm.

 

Celestron RASA 8

Celestron Motorfocus

EQ6-R Pro

TS 2600 MP (Gain 100, Offset 200, -10°)

Baader H-Alpha Highspeed 3.5nm: 178 × 120″ (5h 56′)

Baader O-III Highspeed 4nm: 174 ×120″ (5h 48′)

Baader S-II Highspeed 4nm: 176 × 120″ (5h 52′)

Total: 17h 36′

Bortle 5 (19.50 SQM)

N.I.N.A., Guiding with ZWO ASI 120MM and PHD2

Astropixelprocessor, Photoshop, Pixinsight

  

IC 5070, the Pelican Nebula in the constellation Cygnus in the light of hydrogen. 72 frames, 300 sec. each (6 hr. total). Explore Scientific ED102 0.1m f/7 refractor, Stellarvue 0.8x reducer/flattener, ZWO ASI294MC Pro cooled camera, 7nm H-alpha filter, iOptron CEM25P mount, auto-guided, ASIAir controller. Processed in Astro Pixel Processor, Lightroom, and Photoshop.

 

#astrophotography, #deepsky

10*180s subs = 30 minutes total integration time. Using the Avalon m-zero mount with near perfect guiding, amazing considering I guestimated polar alignment. Imaging telescope was the William Optics GT71 with FF 6A2 that I have finally got working with correct back focus. Still some walking noise from the bad PA,

Camera was the ASI1600mm at 0 degrees. Calibrated lights only in APP.

Again balcony astro, Brisbane city, Bortle 8 and a full moon.

This color image was made with the Mono CCD camera and R, G and B filters. Because the Comet is moving fast all the 103 images made with the three different filters had been shifted and had to be re-aligned before stacking. A second stack was made to only show the stars. The 2 stacks have been combined and processed further.

 

AstroPixelProcessor: Calibration of the sub frames with Bias frames, Dark frames, flat frames and the Bad Pixel Map.

Pixinsight: StarAlignment, CometAlignment, Separate ImageIntegration for R, G, B for stars and comet. BackgroundCorrection, Histogramtransformation (Black point clipping for starcombined image), Pixelmath combination for starimage and Comet image, ,Platesolver script, Arcsinh Stretch, histogram stretch, curves adjustments, Image annotation script, annotations,

 

Knight Observatory, Tomar, Portugal

This Rosette Nebula image is a stack of 19x15 minute H-Alpha images taken with Esprit 100 Refractor and QHY16200 CCD camera. The stack is part of a work in progress for a HaRGB image.

 

Image dates 10,11,12 and 13 November 2017.

 

Knight Observatory, Tomar

Galaxy IC342 can be found in a dusty region, 10 degrees from the Galactic Equator but that dust is not very bright. Almost all IC342 images show just the Galaxy, not the dust in the surrounding region. It was not my intention to image that dust, but when i made a luminance stack with all the 271 (300 second) subs i had, there it was....

 

The inverted image is annotated and i added surface brightness data for a couple of faint Galaxies. KK35 or PGC166077 with a surface brightness of 26.85 mag/arcsec² was thought to be a Dwarf Galaxy but it most likely is an outher region of IC342.

 

Esprit 100 Refractor/ QHY16200 CCD @-20C.

271x300 sec Luminance (22.6 hrs)

 

Calibrated/ stacked with AstroPixelProcessor, post-processed with Pixinsight.

 

Image dates:

15,16,17,18 November 2017, 2,3,4,5,7,8,9,10,11,12 January 2019.

 

en.wikipedia.org/wiki/IC_342

M81, Bode's Galaxy.

Taken with a 102mm F7 Meade APO and ASI533MC Pro.

80 x 180 Seconds exposures, 4 hours of total integration time.

Filters used are a Baader UV/IR Cut Filter.

Image processing with AstroPixelProcessor and Pixinsight.

William Optics GT 71 with 0.8 field flattener.

ASI 294 MC Pro one shot colour CMOS camera.

 

Calibrated in AstroPixel Processor.

60 minutes total integration time

Camera Temperature -10degrees, gain at 300.

A pair of dark nebula in the Aquila constellation on a background of Milky Way consisting of countless stars of all magnitudes. This image shows 50438 stars.....

 

The annotated image (right) shows the deep red Mira variable RT Aql : www.aavso.org/vsx/index.php?view=detail.top&oid=1151

 

One distant Galaxy (PGC166630) is visible in this star rich field at 250 Million lightyear distance.

 

Esprit 100 refractor plus QHY16200 CCD camera on 10 Micron GM2000 mount in a Scopedome 2M. Software: Sequence Generator Pro, AstroPixelProcessor, Pixinsight.

  

Knight Observatory, Tomar.

 

Processed by me, data from Telescope Live Network.

PixInsight, APP and Photoshop.

The Lagoon Nebula is one of the brightest nebulae in the night sky - bright enough for some people to see with the naked eye as a hazy patch in the sky. Around 5,000 light years from earth, this giant interstellar cloud is a nursery for young stars. These baby stars heat up the nebula gas so much that it emits light - light we can see. We may not see much with our naked eye but with a little help and a little patience, we can see a whole lot more.

 

Calibrated images of the Lagoon Nebula were provided by iTelescope.net. In addition to providing access to their telescopes, iTelescope.net provides subscribing members with a combination of premium image sets (with the rights to use & post them) and webinars that show how to process them. Itelescope.net captured the images using their T71 telescope based in the dark skies of Chile. I handled the post-processing side with Astro Pixel Processor, Photoshop, Star Xterminator, and Topaz Sharpen and DeNoise AI.

Dati: 29 x 300 sec a gain 5 e offset 25 a -10° c + 70 dark + 25 flat e darkflat

Filtro Astronomik UV/IR Block L2

Montatura: eq6 pro

Ottica: Takahashi FSQ106

Sensore: QHY168C

Cam guida e tele: magzero mz5-m su Scopos 62/520

Software acquisizione: nina e phd2

Software sviluppo: AstroPixelProcessor e Photoshop

 

Sigma set at 70mm

Imaging from my north facing balcony with an Antlia HA filter.

60 * 120 second subs.

The ASI 1600 was at -5 degress and gain 300.

Captured using Nebulosity.

No PA for the Star Adventurer mount.

Real quick processing with AstroPixel Processor, lights only.

I played a bit with the Bodes and Cigar Galaxy again and cropped it a bit more too.

_____________________________________________________________________

Mount: SkyWatcher HEQ5 Pro

Guiding: ZWO ASI 120MM Mini USB 2.0 Mono Camera - Orion 50mm Guide Scope

Filter: Astronomik CLS CCD EOS APS-C Clip-Filter

Camera: Canon EOS 70D (full spectrum modified)

Askar 80 PHQ F7.5 Quadruplet Astrograph Telescope

Focal length: 600mm

Astronomik CLS CCD Clip Filter

20 x 360 seconds frames - ISO 800 - f7.5

2hr total Integration

Darks: 20 frames

Flats: 20 frames

Bios: 20 frames

DarkFlats: 20 frames

Bortle 5/6

Apps: N.I.N.A. > PHD2 > ASCOM

Processing: AstroPixelProcessor > PixInsight > Photoshop >Topaz > Photoshop

A region of active star formation in the constellation Cygnus glowing in the light of hydrogen gas. On the left is NGC 7000, also known as the North America Nebula, and on the right is IC 5070, a.k.a. the Pelican Nebula.

This is a mosaic of seven tiles, taken with two different astro cameras on three nights in July and August. Explore Scientific 0.1m f/7 telescope, ZWO ASI 294MC (one-shot color) and ASI 2600MM (monochrome) cameras, UV/IR cut fillter, iOptron CEM25P mount, ASIAir controller, auto-guided. Processed in Astro Pixel Processor and Lightroom.

#astrophotography #deepsky region of active star formation in the constellation Cygnus glowing in the light of hydrogen gas. On the left is NGC 7000, also known as the North America Nebula, and on the right is IC 5070, a.k.a. the Pelican Nebula.

This is a mosaic of seven tiles, taken with two different astro cameras on three nights in July and August. Explore Scientific 0.1m f/7 telescope, ZWO ASI 294MC (one-shot color) and ASI 2600MM (monochrome) cameras, UV/IR cut fillter, iOptron CEM25P mount, ASIAir controller, auto-guided. Processed in Astro Pixel Processor and Lightroom.

#astrophotography #deepsky

Dati: 31 x 480 sec ( 4.13 ore) gain 5 @ -10° c + 12 dark + 30 flat e darkflat

Filtro: Optolong l-enhanche

Montatura: EQ6 pro

Ottica: Takahashi FSQ106

Sensore: QHY168C

Cam guida e tele: magzero mz5-m su Scopos 62/520

Software acquisizione: nina e phd2

Software sviluppo: AstroPixelProcessor e Photoshop

Temperatura esterna: 21 ° C - Umidità 85%

On April 15th, 2023 minor planet (270) Anahita passed by galaxy NGC 4939. I captured this encounter with a remote telescope in Auberry, California. Unfortunately this was about 16 hours after the close encounter, but the minor planet is still in the field of view. To my suprise I found an other minor planet, which is the still unnamed (35954) 1999 KY15.

 

The image is a stack of 20 frames of 180 seconds each. The minor planets are only shown in 7 frames each, to better show the movement.

 

Equipment: Planewave 24" (0,61m) CDK, F=3962mm, f/6.5, FLI-PL09000 CCD camera, Mount: Planewave Ascension 200HR.

 

Processing with AstroPixelProcessor and Photoshop.

 

An animation of the movement can be found here: www.jmwill.de/deep-sky-aufnahmen.html#a2584

 

This extent contains eleven Messier objects (M 58, 84, 86-91, 98-100) and many other galaxies. Markarian's Chain is the string of galaxies in the center. My favorite is the Coma Pinwheel Galaxy (M 99) in the center of the upper right quadrant, with its interesting coma shape.

 

Acquisition details: Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 102 x 30 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken on Feb. 27, 2020 under Bortle 3/4 skies.

One of the objects I was able to photograph last night with some unusually clear sky after many cloudy nights, despite it being quite near the horizon. This is one of the more colorful regions of the Milky Way, called the Rho Ophiuchi nebula after the bright star within the blue cloud near the top. The brighter red star near the bottom is the brightest star in the constellation Scorpius called Antares, the Heart of the Scorpion. Much of the region is filled with dust, reflecting the light of nearby stars as well as some gas, mostly hydrogen, glowing because it's energized by the nearby hot stars.

 

Tech: 12 300 sec. exposures, Nikon 80-200mm f/2.8 lens @200mm, ZWO ASI294MC camera, iOptron CEM25P mount, processed in Astro Pixel Processor and Adobe Lightroom.

Some astronomy images leave me wondering if I can actually find the object (named in the title) in the picture. Like finding objects in clouds in our daytime skies, objects in astronomy pictures are sometimes easy to find and sometimes not. Admittedly, my first view of images from this scene gave me a similar feeling - I guessed because of the thick field of stars. So in processing, I removed the stars and BAM! There were the dragons and the egg they were fighting over.

 

Calibrated images of the Fighting Dragons of Ara and the Dragon's Egg Nebula were provided by iTelescope.net. In addition to providing access to their telescopes, iTelescope.net provides subscribing members with a combination of premium image sets (with the rights to use & post them) and webinars that show how to process them. Itelescope.net captured the images using their T71 telescope based in the Rio Hurtado Valley, Chile. This was especially helpful because the Dragons of Ara are visible in the Southern Hemisphere where I live in Colorado. After capturing, I handled the post-processing side with Astro Pixel Processor, Photoshop, Star Xterminator, Topaz Sharpen and DeNoise AI.

An image in Ha RGB

 

Located between Hadar and Rigel Kentaurus, this nebula has recently become quite a favourite for astroimagers

 

Location : Bortle 6

 

Equipment

Sharpstar z4/Antlia 3 nm Ha filter/ Antlia Triband RGB filter/ZWO 533 Mm pro -for H-alpha /6/533 MC pro for RGB colour/ASIAIR/HEQ5/ASIAIR

 

Data

 

4 hours in RGB (5 minute subs)

 

8 hours in Ha (10 minute subs)

 

20 minutes in RGB ( 60 second subs) -for stars

  

Processing

 

stacked in AstroPixelProcessor, processed in PixInsight

 

Processing Notes

Ha and RGB separately

 

Stack

register Ha, RGB long and RGB short stacks

Dynamic Crop

GraXpert

Blur X -correction

Image Solver

SPCC

Starnet++

 

Nebula

BlurX

NoiseX

GHS

NoiseX

Dark Structure Enhance ( for Ha only)

Curves Transformation

 

Stars

 

SetiAstro star stretch script

 

HaRGB image constructed using Foraxx utility in PI :

 

Synthetic OIII constructed as follows:

 

RGB image split into r,g and b

 

OIII=( 0,55*G +0.55*B)- 0.1*R

on the assumption that some red leaks into Blue and Green, 10 % is just a guess

 

Starless image in Foraxx constructed using Paulyman's script in PI

 

Curves Transformation after applying a luminance mask

 

Stars and starless combined with Pixelmath

 

Minor tweaking including a final crop - in Photoshop CS6

 

See also Starless version in Ha

 

flic.kr/p/2qixzHK

 

First ever HARGB image taken with the ASI183MM and Antlia RGB HA 3.5nm filters.

The RGB sequences were taken in Nebulosity at 15 degrees as I could not get the software to cool the camera. NINA was used to capture the HA and it worked a treat. This is fabulous software and its free.

ASI183MM gain = 111

20 * 60 sec RED

20 * 60 sec GREEN

20 * 60 sec BLUE

12 * 600 sec HA.

Calibrated in Astro Pixel Processor.

Mount was the m-zero with just a rough PA so some walking noise in the shadows but hey, I am thrilled :)

This shows the output of the APP program after the automatic mosaic process. APP finds all overlaps (i used 15% for the SGP Frame and Mosaic wizard settings) and positions and the right orientation and distortion correction! I loaded a masterdark, bad pixel map and masterflat together with all the single light frames. Each panel is a single 15 minute H-alpha (7nm) exposure with QHY16200 CCD/ Esprit 100 f5.5 refractor) Again, this Flickr upload is a downscaled version at 12.5%, the full version is 600 megapixels.

 

Still need to do registration and background optimization.

 

Knigh Observatory, Tomar.

Western Veil Nebula

Bi Color

20x 300s Ha

20x 300s O3

SW80ED

Atik Horizon

Processed in APP

 

This H-alpha image mosaic shows only the Emission Hydrogen nebulae in a part of the Cygnus Constellation. The stars have been removed using a neural network.

 

Technical information:

telescope: Esprit 100 refractor

camera: QHY16200 CCD

filter:Baader 6nm H-alpha filter

Integration time: 25 hrs.

 

21 panel mosaic made with Astropixelprocessor, processed with Pixinsight and Starnet++

(This version is reduced in size, a test with the neural network software to process the nebulosity separated from the star image. After star removal the image is showing the nebulosity really well....

Sky-Watcher Quattro 150P f/3.5

QHYCCD Minicam8

 

HOO

60 x 60sec. Ha

48 x 60sec. OIII

 

Processed with Astro Pixel Processor, NoiseXTerminator and Affinity Photo.

Date: 2023-5-13,21,25, 6-14

Location: El sauce Observatory, Chile

Optics: R200ss,

Camera: ASI294MM-pro

Exposure: 6 panel mosaic

・P1 (L, R, G, B) = (164, 72, 68, 68)

・P2 (L, R, G, B) = (173, 70, 69, 69)

(gain 120, offset 5)

Processing: Pixinsight, AstropixelProcessor, Photoshop

We are looking at an individual star at 21 Million lightyears......

Discovered on 22 jan 2019 by ATLAS (Asteroid Terrestrial-impact Last Alert System) on Hawai.

48x300 seconds Luminance stack,6 February 2019 00:00-04:30

Telescope: Esprit 100

Camera: QHY16200 CCD @-20C

Processed: Astropixelprocessor/ Pixinsight.

 

Next to the enlarged inset is a 3D brightness plot showing AT2019abn in relation to forground stars.

 

wis-tns.weizmann.ac.il/object/2019abn

 

fallingstar.com/home.php

 

www.rochesterastronomy.org/snimages/

Dati: 109 x 300 sec a gain 5 e offset 25 a -10° c + 70 dark + 25 flat e darkflat

Filtro Astronomik UV/IR Block L2

Montatura: eq6 pro

Ottica: Takahashi FSQ106

Sensore: QHY168C

Cam guida e tele: magzero mz5-m su Scopos 62/520

Software acquisizione: nina e phd2

Software sviluppo: AstroPixelProcessor e Photoshop

 

ZWO ASI2600MM, Chroma 3nm Ha/O3/S2 filters, Stellarvue 70mm scope with .8 FR on Orion Atlas Pro mount. Guiding. SGPro, PHD2, 24 x 5 min = 2 hours Ha and 12 x 5 min = 1 Hour O3 and S2 each. Pixinsight, Astropixelprocessor and Photoshop CC.

Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 42 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken just before astronomic dawn on Oct. 2, 2019 under Bortle 3/4 skies.

24-07-2020, 9 x 30 seconds Luminance, Esprit 100 telescope/QHY16200 CCD @-20C. Calibrated subs in AstroPixelProcessor, further processing in Pixinsight: Staralignment, Cometalignment, ImageIntegration, DynamicBackgroundExtraction, MaskedStretch, Curves, HDRMultiscaletransform

M101 is about 25 million lightyears away from us. Its spiral arms show several "knots" that are regions of star forming.

101 x 180s @ ISO 800

Pentax K3ii and TS 130/910 APO.

This is the version stacked with AstroPixelProcessor.

The Heart (IC 1805, right) and Soul (IC 1848, left) star-forming nebulae. A composite of 18 5 minute exposures, ZWO ASI294MC Pro camera, Nikon 80-200mm f/2.8 lens, 200mm, f/4, dual narrow-band filter (Hα+[O III]), iOptron CEM25P mount, ZAO ASIAir controller, ZWO ASI120MM Mini guide camera and Astro-Tech 60mm f/4 guide scope.

Dati: 36 x 4 min. 800 Iso + 15 Dark + 25 flat e darkflat software: AstroPixelProcessor e Photoshop CS2 Strumenti: ottica Takahashi FSQ106 f/5 su Skywatcher EQ6 pro - Canon 40D CentralDS. 12/08/2020 - Castelletta (AN), Temp. esterna: 20° C temperatura al sensore 0,00°C - Umidità 79%

Sometimes known as the Black Eye Galaxy.

The Ursa Minor Dwarf Spheriodal Galaxy is the faintest known member of the local group of Galaxies with a surface brightness of 25.5 V-mag/arcsec^2. (ref 3). Distance is 225000 lightyears (ref 1)

 

RA: 15h09m08.5 / Dec: +67d13m21

 

Imaged on 4,5,6,10 & 11 May, 2018

Esprit 100 APO Refractor+QHY16200CCD @-20C/ IDAS LP2 filter.

 

Knight Observatory, Tomar

 

ref 1) en.wikipedia.org/wiki/Ursa_Minor_Dwarf

ref2 ) www.space.com/15619-faintest-globular-star-cluster.html

ref3) arxiv.org/pdf/astro-ph/0206144.pdf

 

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