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Photographed from mid-town Toronto, Canada

* Temperature -6° C. the first night; 0° C. the second night; -4° C. the third night

This three-frame assemblage shows how the appearance of the Moon changes from one night to the next, as the terminator (the dividing line between day and night) moves from right to left across the visible face of the Moon. On average, the terminator moves across the Moon's face about 12.7° per 24 hours, as the Moon orbits planet Earth once per month.

The time difference between the right and middle frames was 25 hours, and between the middle and the left frames was 28 hr, 20 min.

In the right frame, the Moon is 96.2% illuminated by the Sun; in the middle frame, the illuminated portion has decreased to 90.6%, and in the left frame the illuminated portion is 82.1%.

______________________________________________

Nikon D810 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope (explorescientificusa.com/products/152mm-apochromatic-refr...), mounted on Sky-Watcher AZ-EQ6 SynScan mount (ca.skywatcher.com/_english/02_mounts/02_detail.php?sid=65).

1200 mm focal length, f/8

* ISO 100 or 125, multiple stacked 1/250 sec. exposures

Subframes stacked in Registax

Processed in Photoshop CS6

(brightness, contrast, colour desaturation, sharpening, image rotation)

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Manufacturer: Lancia Automobiles S.p.A., Turin - Italy

Type: Beta Coupé 1600 Tipo 828 1a Series

Production time: mid-year 1974 - mid-year 1975

Production outlet: 1,978

Engine: 1592cc straight-4 Fiat Twin Cam 828AC.000 DOHC

Power: 108 bhp / 6.200 rpm

Torque: 135 Nm / 4.500 rpm

Drivetrain: front wheels

Speed: 180 km/h

Curb weight: 1010 kg

Wheelbase: 92.5 inch

Chassis: box frame with subframe and self-supporting aluminum uni-body

Steering: rack & pinion

Gearbox: five-speed manual (transversely in-line) / all synchromesh / floor shift

Clutch: single dry plate disc

Carburettor: Weber 34 DMTR21 / Solex C34 CIC-1

Fuel tank: 51 liter

Electric system: 12 Volts 45 Ah

Ignition system: distributor and coil

Brakes front: 9.88 inch hydraulic discs

Brakes rear: 9.88 inch hydraulic discs

Suspension front: independent MacPherson struts, parallel transverse links, lower wishbones, sway bar, coil springs + internal telescopic shock absorbers

Suspension rear: independent MacPherson struts, multi-link, parallel double lower wishbones (A-arm, control arm), sway bar, coil springs + internal telescopic shock absorbers

Differential: helical axle drive 4,214:1

Wheels: 5½J x 14 inch

Tires: 175/70 SR 14

Options: ZF power steering

Special:

- The Beta (1972-1984) was the company's first new model introduced by Lancia after it had been taken over by FIAT in 1969.

- Vincenzo Lancia used letters of the Greek alphabet for his early cars, like Alpha, Beta, Gamma, etc., and as such, Beta had been used on two previous vehicles.

- This 2+2 Coupé, designed in-hous led by Aldo Castagno (Lancia) and Pietro Castegnero (from Carozzeria Pininfarina S.p.A., Cambiano - Italy, but acting as styling consultant), is based on a shortened Berlina chassis (100 inch) and has also the first ever multi-link rear suspension used in a mass produced car, designed by Sergio Camuffo.

- The Beta Series was assembled in Turin (Italy) and in Pamplona (Spain).

Prague, Czech Republic

His Name is Stephan. and he is german. we travelled around with him for a couple of days and ended up sharing a bamboo house boat in Kerela for a night. During My three month stay in india, i met many different people from all over the world. After meeting Stephan, i can now say that Germans are my favorite! i love the ripples around his body and how they subframe him into a little motif

Sensia 200 @ 800 cross processed at a shitty lab in Mumbai

Tech: Pentax K1000 35mm

Taken at the Victoria & Albert Museum, London, and inspired by the Saul Leiter Exhibition at The Photographer's Gallery

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Photographed at Algonquin Provincial Park, Ontario, Canada, between 03.10 and 03.38 EDT

(285 km by road north of Toronto)

* Altitude of nebula at time of exposures: 31-34°

* Temperature -2° C.

* Total exposure time: 13 minutes

* 540 mm focal length telescope

For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/30004438900

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Description:

I cannot think of a more famous or more often photographed and observed object in the night sky than M42 & 43 in the constellation Orion. This nebula is visible to the unaided eye smack in the centre of the sword of Orion, hanging down from Orion's three-star belt.

From Wikipedia:

"The Orion Nebula ... is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2000 times the mass of the Sun."

For more information about this object, click here:

en.wikipedia.org/wiki/Orion_Nebula

For another photograph of this nebula made in March 2017, click here:

www.flickr.com/photos/97587627@N06/32743247300

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Technical information:

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount using an ADM Accessories side-by-side saddle

Main body of the nebula:

Thirteen stacked frames; each frame:

540 mm focal length

ISO 3200; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

Centre of the nebula:

Eight stacked frames; each frame:

540 mm focal length

ISO 2000; 15 seconds exposure at f/5.4; unguided

Subframes registered in RegiStar;

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

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Canon 500N & ef 28-80mm, Fomapan 400 in xtol1:1

Dwarf mini, EQ mode, duo band filter, gain 60, 1h 34m, subframes da 45s, elaborazione con AstroWizard.

The Wester Veil with more data 7,5h

This is the first time I use this method on pixinsight, (HOO combination).

-Equipment-

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

Camera: ZWO ASI533MC Pro at -5°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher EQ5

Filter: Optrolong L-eXtreme

-Acquisition-

Light : 90x300s (7,5h) at Gain:101 Offset:49

Dark,Flat,Offset

Date : Take on 5 night from 06/13/2021 to 07/12/2021

Location : France-Alsace Bortle 4/5

-Software-

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

All Processing in Pixinsight

Use EZ_Processing Suite(by darkarchon) in Pixinsight

ForaxX Color combination thecoldestnights.com/

-Pre Processing-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Crop the black bands from the stacking

-Processing-

Dynamic Background Extraction

Split RGB Channels

Combine 70% of green and 30% of blue into 'Oiii'

Rename R to Ha

EZ_SoftStretch Ha and Oiii

Pixelmath: HOO combination with ForaxX expressions

R = Ha

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

B = Oii

Curve Transformation ( RGB/K, Hue, Saturation,...)

SCNR (Green 40%)

EZ_HDR

EZ_Star Reduction

Clear skies !

There are a number of other galaxies in this image in addition to M101 centered. They are smaller and many are clustered near M101. Near the top and off to the right is NGC5422. Near the bottom and a bit to the left is NGC5474. There are others that might be mistaken for stars.

Dwarf 3 smartscope

206 45-second subframes | 60 gain | total exposure time 153.75 minutes

The Rosette Nebula consists of an open star cluster and a large emission nebula. It is a few degrees east of the star Betelgeuse in the sky. Although I have captured it many times in wide field shots of the area around Orion, I never made a dedicated effort on the nebula itself before this. The light used here was all from the 656 nm line of hydrogen emission. I might go back later and add an oxygen channel, but I thought this result was worth sharing.

I shot this mosaic over seveal nights from 2022-01-28 through 2022-02-01. It's a five panel mosaic, with stacks of 2 minute exposures for each of the five tiles, ranging from 31 up to 54 subframes. Imaging was done with a Celestron Edge HD 925 with Hyperstar and an Atik 414-EX monochrome CCD with an Atik H-alpha filter. Preprocessing in Nebulosity; mosaic compilation and other processing done in PixInsight.

NGC 4039, the antennae galaxy, LRGB 8.5 hours total, 16min subframes, telescope GSO 30cms f8 native (mild descollimation), camera STT8300 at -35°C, AO-8 unit; from La Colonia, Illapel, Chile. This is a tribute to my Master (RIP) Daniel Verschatse who won a prize with this same object years ago.

Venice, Italy

Comet C/2022 E3 (ZTF) I imaged this remotely from Spain 31st December 2022 4:30am with Epsilon 180ed and ZWO ASI2400MC pro. Exposure time was 45mins total using 60s subframes.

Cheers

Peter Shah

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Photographed at Algonquin Provincial Park, Ontario, Canada, between 03.00 and 03.24 EDT

(285 km by road north of Toronto)

* Temperature 12° C.

* Total exposure time: 11 minutes

* 540 mm focal length telescope

___________________________________________

Description:

This faint and visually very elusive nebula can be photographed to advantage only in a good dark sky.

Known as the "California Nebula" because of its shape, this glowing cloud of red hydrogen gas is quite large; about five times as long as, and a little wider than, the Moon appears in our sky. The nebula is located 1,000 - 2,000 light years from our solar system, and is about 100 light years from end to end. Radiation from the nearby blue-white star Xi Persei (the brightest star in the frame, below the nebula) causes the nebula to fluoresce.

The California Nebula was discovered by famed American astronomer E.E. Barnard in 1884-5, just in time to be added to Dreyer's New General Catalog (NGC).

For a version of this photo WITH STAR LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/28723113074

___________________________________________

Technical information:

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

Eleven stacked frames; each frame:

540 mm focal length

ISO 4000; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

Subframes registered in RegiStar;

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

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Gypsy Woman…

This is my best comet image to date. I can see a fair amount of detail in the dust tail, and a decent showing of the "forward" pointing ion tail.

I am not able to identify the fuzzy blob seen directly above the nucleus as seen in this image. PixInsight Annotation script does not show an object at this location. I cannot see an outburst in any of the subframe data. Please comment with any ideas.

ZWO ASI6200MM-P/EFW 2" x 7 (L)

Tele Vue NP101 (4" f/4.3)

Losmandy G11

Luminance filter only.

2s x 24 subs = 2m total integration time

Processied in PixInsight

Finished in Affinity Photo

Manufacturer: Alvis Car and Engineering Company Ltd, Coventry - UK

Type: TB 21 Roadster / 3 Liter Sports

Production time: mid-year 1950 - mid-year 1952

Production outlet: 31

Engine: 2993cc straight-6 OHV seven-bearing short-stroke engine (by ALVIS)

Power: 96 bhp / 4.000 rpm

Torque: 186 Nm / 1.800 rpm

Drivetrain: rear wheels

Speed: 143 km/h

Curb weight: 1280 kg

Wheelbase: 111.5 inch

Chassis: ladder frame with a bolted subframe and separate steel body (by AP Metalcraft, Coventry - UK)

Steering: Marles spindle & nut

Gearbox: four-speed manual / II, III and IV synchronized / floor shift

Clutch: Borg & Beck type 9 A6-G single dry plate disc

Carburettor: single horizontal 38 mm SU H4 (+ electric pump from petrol tank)

Fuel tank: 65 liter

Electric system: Lucas 12 Volts 63 Ah

Ignition system: distributor and coil

Brakes front: hydraulic 11 inch Lockheed drums (two-leading-shoe type)

Brakes rear: hydraulic 11 inch Lockheed drums (two-leading-shoe type)

Suspension front: independent trapezoidal triangle crossbars, silentbloc bushes, sway bar, coil springs + double acting Armstrong hydraulic piston dampers

Suspension rear: rigid axle, silentbloc bushes, longitudinal semi-elliptic leaf springs + double acting Armstrong hydraulic piston dampers

Rear axle: live semi-floating type

Differential: hypoid bevel final drive 3.77:1

Wheels: 15 inch steel discs

Tires: 6.00-15

Options: cloth cap, steel spoke wheels

Special:

- This 3 Liter Roadster (or Sports), based on the TA 14, was up against the Jaguar XK 120, released a year earlier the Sports Car market.

- It was not a success for Alvis (only 31 sold!!!), while Jaguar sold thousands XK 120’s (XK 120 Roadster: 7,612 units built, XK 120 Cabriolet: 1,765 units built and XK 120 Coupé: 2,678 units built).

- The Alvis TB 21 Roadster, assembled in Coventry, was too expensive at £1598 on the home market.

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

* Temperature 11 degrees C.

Total exposure time: 15 minutes.

* 540 mm focal length telescope

___________________________________________

Description:

This is a large and quite faint emission nebula and star forming region over 100 light-years across, located about 2,400 light-years away in the constellation Cepheus. It is energized by the bright, bluish central multiple star. The very small Elephant’s Trunk nebula (IC 1396A) is inside the dark elongated globule just to the right of centre.

From one web site: "The brightest star (38,000 times brighter than the Sun) ... [at the lower left edge of the nebula] is mu Cephei. It is a red supergiant star with a diameter larger than the orbit of Saturn, some 2536 times the diameter of the Sun. It is one of the largest stars we know of. Also called Herschel’s Garnet Star, mu Cephei is a variable star that varies in magnitude from 3.4 to 5.1 over a period of approximately 730 days."

For a view of this same nebula made with a 200 mm lens on July 1 of this year, click here:

www.flickr.com/photos/97587627@N06/28078652915

For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/31041148481

__________________________________________

Technical information:

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head

Fifteen stacked frames; each frame:

540 mm focal length

ISO 6400; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

Subframes registered in RegiStar;

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

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Scrapped, the last MOT expired September 2012 when it failed a test. Rotten front subframe mounts.

Seen in Fratton.

Not to be confused with the Loch Ness Monster Nebula.

LdN-768 on the left side a bit below the middle.

I would like to take this image again’t with the Dwarf 3 to capture a bigger section and get slightly better resolution.

Seestar S50

582 ten-second subframes.

Prague, Czech Republic

Venice, Italy

The Tyne ferry "Pride of the Tyne" viewed within the mechanism which raises and lowers the landing with the tides.

The constellation of Cygnus has a lot of interesting things to photograph and covers a wide areas of the night sky. In this image you can find NGC 6910 aka Rocking Horse Nebula, which is a loose collection of stars. You can find SH2-108 the Butterfly Nebula. The dominant star is yCyg.

Semester S50

724 ten-second subframes

This image of NGC1499 was generated from the monthly image data given to iTelescope subscribers. The data was captured on their T80 telescope at E-Eye Fregenal de la Sierra on 27/10/2023.Because so few files had already been calibrated, the master files were created in AstroPixelProcessor before being processed in Pixinsight. The image is made up from 6 x LRGB 180s subframes giving a total integration time of 1.2 hours.

Manufacturer: Renault S.A., Boulogne-Billancourt (Paris) - France

Type: NN Torpédo 6CV

Production time: 1924 - 1928

Production outlet: ± 150,000

Engine: 951cc straight-4

Power: 15 bhp / 1.980 rpm

Drivetrain: rear wheels

Speed: 60 km/h

Curb weight: 810 kg

Wheelbase: 104.7 inch

Chassis: ladder frame with wodden subframe and separate body

Steering: screw and nut

Gearbox: three-speed manual + reverse / floor shift

Electric system: Bosch 12 Volts with starter/generator by Rhone, Paris

Ignition system: Bosch magneto

Brakes front: mechanical drum brakes

Brakes rear: mechanical drum brakes

Suspension front: semi-elliptic leaf springs

Suspension rear: transverse leaf springs

Rear axle: live

Differential: spiral bevel

Wheels: closed discs

Special:

- The model NN, aka Renault 6CV, was designed by Louis Renault and at first shown at the 1924 Mondial de l'Automobile in Paris.

- In the early '20s Renault released a series of new models, recognizable by their "cheese plate radiator” or "shovel-nosed" hood, with prominent "gills" on the sides of the bonnet/hood for cooling.

- The radiator was placed behind the engine, with the gas tank behind that (note the two caps on the hood).

- In 1927 it became the first car to make a solo trip across the Sahara Desert.

- The NN Series was assembled in Billancourt, France and available as this 2-door Roadster, as 2-door Coupé Limousine, as 4-door Torpédo, as 4-door Landaulet-Taxi, as 4-door Limousine and as rolling chassis for coachbuilders.

- In 1928 the larger and heavier NN2 was introduced (1928-1929), recognizable by the bumpers.

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

between 23.10 and 23.13 EDT

* Altitude of comet's head at time of exposures: ~12°

* Temperature 17° C.

* Total exposure time: 1.25 minutes

* 105 mm focal length lens

___________________________________________

Description:

This comet has been touted as the brightest in a generation. The last comet that I can remember being this bright was Comet Hale-Bopp in 1997, which was undoubtedly the best comet that i will have seen in my lifetime.

This visitor to the inner solar system was discovered on March 20 this year by astronomers during the NEOWISE mission of the Wide-field Infrared Survey Explorer (WISE) space telescope (hence the name of the comet). It reached naked eye visibility this month, and I finally got into a dark sky - with no Moon in the sky to wash out the fainter outer reaches of the tail - on July 17.

In this view we see the bright head of the comet at the bottom near the horizon, with the broad yellowish dust tail fanning out to the right, and the fainter, narrow bluish plasma or ion tail bordering the dust tail to the left.

At the time of this photo, Comet Neowise was 78 million km (0.52 astronomical units ("AU") - the distance from Earth to the Sun) from the Sun, and 109 million km (0.73 AU) from Earth, and shone at a brightness of third magnitude, with a 10 degree tail.

___________________________________________

Technical information:

Nikkor AF-S 70-200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO mount with a Kirk Enterprises ball head

Six stacked frames; each frame:

105mm focal length

ISO 3200; 30 sec. exposure at f/5.6; unguided

With long exposure noise reduction

Subframes stacked in RegiStar;

Processed in Photoshop CS6 (levels, brightness / contrast, colour balance, deblurring of tree horizon)

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

Sunset through the rock hole

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

Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

between 23.10 and 23.13 EDT

* Altitude of comet's head at time of exposures: ~12°

* Temperature 17° C.

* Total exposure time: 1.25 minutes

* 660 mm focal length telescope

___________________________________________

Description:

This comet has been touted as the brightest in a generation. The last comet that I can remember being this bright was Comet Hale-Bopp in 1997, which was undoubtedly the best comet that i will have seen in my lifetime.

This visitor to the inner solar system was discovered on March 20 this year by astronomers during the NEOWISE mission of the Wide-field Infrared Survey Explorer (WISE) space telescope (hence the name of the comet). It reached naked eye visibility this month, and I finally got into a dark sky - with no Moon in the sky to wash out the fainter outer reaches of the tail - on July 17.

In this view we see the bright head of the comet at the left side, with the broad yellowish dust tail fanning out to the right, and the fainter, narrow bluish plasma or ion tail bordering the dust tail at the top.

At the time of this photo, Comet Neowise was 78 million km (0.52 astronomical units ("AU") - the distance from Earth to the Sun) from the Sun, and 109 million km (0.73 AU) from Earth, and shone at a brightness of third magnitude, with a 10 degree tail.

___________________________________________

Technical information:

Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount

Five stacked frames; each frame:

660 mm focal length

ISO 3200; 15 sec. exposure at f/5.2; unguided

With long exposure noise reduction

Subframes stacked in RegiStar;

Processed in Photoshop CS6 (levels, brightness / contrast)

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

Seestar S50

967 ten second subframes

A complete rework and framing from my previous version of the Pleaides.

This version was to show more of the dust clouds surrounding the reflection nebula which is just as interesting as the star cluster and it's nebula itself.

Captured from my home in Gérgal, Almería, Spain in two nights on the 28 and 29th of November 2021

Subframes:

Red: 168 x 120s = 5.6h

Green 172 x 120s = 5.7h

Blue 172 x 120s = 5.7h

Calibration

20 x Darks and Flat Darks

​​​​​​​20 x Flats per filter for each night

Margate, 2021.

It's not the best time here for astrophotography, the nights are short the summer solstice approaches.

But I managed to have 3 hours of data on the Western Veil

The Western Veil (also known as NGC 6960) is a part of the Cygnus Loop a large a supernova remnant whose explosion dates back 10.000 years.

The Western Veil is a nebula made of ionized gas and dust located about 1,400 light years from Earth

-Equipment-

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

Camera: ZWO ASI533MC Pro at -5°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher EQ5

Filter: Optrolong L-eXtreme

-Acquisition-

Light : 36x300s ( 3h ) at Gain:101 Offset:49

Dark,Flat,Offset

Date : Take on 3 night 06/13-15/2021

Location : France-Alsace Bortle 4/5

-Software-

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

All Processing in Pixinsight

Use EZ_Processing Suite(by darkarchon) in Pixinsight

-Pre Processing-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Crop the black bands from the stacking

-Processing-

Linear Fit

Channel Combination

DBE

EZ_Deconvolution

Background Neutralization

Photometric Color Calibration

SCNR (green 50%)

EZ_Denoise

EZ_Soft Strech

EZ_HDR

Curves Transformation with mask on nebula for Saturation, Hue and K channel

EZ_Star Reduction

Clear skies !

Manufacturer: Auto Union AG, Auto Union AG, Chemnitz - Germany

Type: F4 Series Lastwagen

Engine: 692cc straight-2 two-stroke water-cooled

Power: 20 bhp / 4.000 rpm

Speed: 85 km/h

Production time: 1934 - 1936

Production outlet: unkown

Curb weight: 800 kg

Special:

- Auto Union was the result of a merger between four companies in 1932: Wanderer, DKW, AUDI and Horch.

- The emblem represents this amalgamation with its four rings, one representing each company.

- The shares were sold in 1964 to Volkswagen and from that time on they were called Auto Union (without DKW).

- In 1969, NSU became part of the union and became known as AUDI NSU. In 1985, it offically became known as AUDI.

- From 1931 until Juli 1963 they were build at Audi works in Zwickau, Germany.

- This DampfKraftWagen (DKW) "Lastwagen" / lorry was based on the F4 Series (1934-1935), having front wheel drive.

- It has a three-speed manual gearbox (with a lockable freewheel device), a "Krückstockschalthebel" / "umbrella stick" coming out of the dashboard, a 6-Volts electric system, a 32 liter fuel tank and front wheel drive.

- Its self-supporting body was supported by a U-profile plywood subframe, has rear hinged "suicide" doors for easier access and egress, independent suspension and drum brakes all around.

Our closest neighbor, the Andromeda Galaxy.

Another shot made with the new telescope OS Veloce RH200.

Also this image is a quite short expusure of the subject in a 4.5° field of view.

LLRGB made with all 10min subframes time are 30:30:30:30. A car passed during the exposure so a subtle reflection in form of an arch is visible on the image... What a pity.

Thanks for watching!

Widefield shot of M31 - taken with waxing crescent in the night sky

Taken using a 55-250mm telephoto lens at 170mm f/7.1

Canon EOS 700D on a HEQ5 Pro mount

1 hr 30 mins of subframes, 3 mins each at ISO 800

Stacked and processed in DSS and GIMP.

M42 The Orion Nebula imaged in HaOiiiOiii. The Ha image is mapped to red and consists of 6 hours of 60 second subframes. The Oii image is mapped to green and blue and consists of 4 hours worth of 60 second subframes.

Ha data was captured during December 2019 and January 2020.

Ts65 Quad Astrograph & ASI1600MM Pro camera

IC1805, the Heart Nebula with the open star cluster Melotte 15 inside. About 6500 light years away from us.

238 Subframes of 3 minutes each, just under 12 hours in total. +

200 calibrationframes.

Full version: theastroenthusiast.com/wp-content/uploads/2021/12/rosette...

Starless version: theastroenthusiast.com/wp-content/uploads/2021/12/starles...

I highly recommend opening the full version to take a closer look at some of the finer details revealed by the large integration time. A starless copy is also provided to show off fainter detail.

This incredibly detailed image of the Rosette nebula was created from more than 110 hours of exposure across three continents — Europe, USA, and Oceania. We combined 1064 subframes and 6791 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 a wispy structure of bok globules and dust, framed by the glowing ionized gas behind it. The center of the image displays the faint particle streams created by sulfur and oxygen gas blown away from the bright cluster of stars. Just below the center of the rosette nebula lies a beautiful mountain-like structure created by sulfur and hydrogen gas. Through the center of the image, faint wisps of glowing sulfer gas are visible above the dominant oxygen gas.

Credits:

Image Acquisition: Jens Unger (www.instagram.com/jazz.astro/), Rob Olson (www.instagram.com/the.robservatory/), Dominic Annis (www.instagram.com/domnuch/), Justin P. (www.instagram.com/justadudewitha_camera_/), Amrit Prasad (www.instagram.com/amrit.insta/), Tommy Lease (www.instagram.com/colorado_astro/), Jay Aigner (www.instagram.com/aignerastro/)

Image Processing: William Ostling (theastroenthusiast.com/), Justin P. (www.instagram.com/justadudewitha_camera_/)

We would love to have you in our astrophotography group! The link to join is in our Instagram bio: www.instagram.com/friendly.cosmos/

It was mostly cloudy this weekend so I didn't get much of a chance to add to the Orion images, I went out and tried shooting at a place I thought would make a good winter shooting location based on light pollution maps (easy access, supposedly bortle 3), turned out not so great, guess I'll have to keep searching. I also changed up my setup a little bit, opened up the legs on my tripod and hung a 20 pound dumbbell under it for better stability, now it's rock solid. I tried shooting 5 minute exposures with my D7000 and Samyang 135mm lens, it seems like I can get to 5 minutes fairly consistently with not too many subs that have to be thrown out (keeper rate of about 75% I'd guess), but once I go above 5 minute exposures the keeper rate drops down to probably 30%. The periodic error (?) of the mount is 10 minutes from what I've read so I guess once you get up to that length of exposure you are running into mount limitations. I'm thinking of buying a guidescope and camera and trying out some guiding with the mount to see if I can improve the keeper rate, I'd really love to take some super long exposures (like 10 minutes) to really bring out the dust around this area as well.

So I ended up only getting another 6 subs out of all the ones I shot thanks to clouds and tracking error, I decided to go back and re-calibrate, register, and stack in PixInsight this time using the subframe selector script to weight the subs prior to registering/stacking. I also tried not going to wild on the post processing and just focusing on bringing out the dust without destroying the image with noise.