Some famous objects in this small corner of Gemini: at lower left is the Monkeyhead nebula, over on the right is open cluster M35 and the much more compact (and older and further) NGC 2158. Meanwhile at top centre we have Jellyfish nebula sitting between the bright stars Propus and Tejat.

This image is a 2x2 mosaic, each tile being an integration of subframes shot on a QHY168C with a Canon 400 f5.6L lens. A dual narrowbard filter was used. Imaging was managed via SGP and PHD2, all post-processing was carried out in PixInsight.

Observed from Prachinburi, Thailand

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Photographed from mid-town Toronto, Canada, at 21.36 EDT (Moon altitude: 35° | Sun 35° below the horizon)

* Temperature 10° C.

When I made the subframes that have been assembled for this image, the Moon was still 39 hours (a little more than a day and a half) from reaching its full phase. As a result, you can see the terminator (the dividing line between the sunlit and dark portions of the lunar disk) along the left edge, with craters and mountains in sharp profile from the low angle of the Sun.

Last night the Moon appeared distinctly yellowish in colour, probably caused by dust particles in the atmosphere. I have tried to neutralize the yellow during processing of the image, but the slight yellow cast is still evident.

______________________________________________

Nikon D850 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Sky-Watcher AZ-EQ6 SynScan mount.

Best ten of ten sixteen identical stacked frames; each frame:

* 1253 mm focal length

* ISO 100, 1/200 sec. exposure, f/8

Stacked in Registax

Processed in Photoshop CS6

(brightness, contrast, colour desaturation, colour balance)

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Abell 1367

Leo Galaxy Cluster

The Leo Cluster (Abell 1367) is a galaxy cluster about 330 million light-years distant in the constellation Leo, with at least 70 major galaxies. The elliptical galaxy known as NGC 3842 is the brightest member of this cluster. This is seen to the left and slightly upward of the center of the image. Along with the Coma Cluster, the Leo cluster is one of the two major clusters comprising the Coma Supercluster, which in turn is part of the CfA2 Great Wall, an immense galaxy filament which is hundreds of millions of light years long and is one of the largest known structures in the universe. The “CfA” designation refers to “Center for Astrophysics” redshift survey and was an attempt to map the large scale structure of the universe. CfA2 was the second survey started in 1985 and the Great Wall was discovered in 1989

The Leo Cluster mostly contains spiral galaxies, suggesting that it is much younger than other comparable clusters, such as the Coma Cluster. It is also home to one of the universe's largest known black holes, which lies in the center of NGC 3842. The black hole is 9.7 billion times more massive than our sun. (Wikipedia)

Capture info:

Location: Orion’s Belt Remote Observatory, Mayhill NM

Telescope: Takahashi ED180

Mount: Paramount MX+

Camera: SBIG STXL 16200

Data: LRGB 2.5,2,2,2.5 hrs (5min subframes)

Processing: Pixinsight

A quick image of Messier 27, before exam season begins. Taken during nautical twilight since it doesn't properly get dark here in the UK now until August.

Details:

Skywatcher 200PDS

Skywatcher HEQ5 Pro

Canon EOS 700D

59 x 30s ISO800 subframes, stacked in Deep Sky Stacker and processed in IRIS and GIMP.

In between tracking comet NEOWISE as it dips down early in the evening I also turned my 80mm refractor's attention to the Andromeda galaxy before packing up for the night. This is a stack of 35 five-minute subframes with a colour CMOS deep sky camera, the ZWO ASI071, flats and darks have been subtracted.

Peter

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I'VE FINALLY GOTTEN AROUND TO PROCESSING THIS IMAGE!

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Photographed 40 km south of Alice Springs, Northern Territory, Australia, between 04.27 and 04.35 CAST (Central Australia Standard Time)

* Observing site: Long. 133.69° E. | Lat. 23.98° S. | Elev. 612m

* Altitude of centre of frame at time of exposures: ~21°

* Total exposure time: 7 minutes

* 200 mm focal length lens

___________________________________________

Description:

NOTE: This is a wider angle view of much higher magnification image of the Eta Carina Nebula made with a 660 mm focal length telescope 8 nights earlier near Uluru-Kata Tjuta National Park (Ayers Rock), which you can see here:

www.flickr.com/photos/97587627@N06/49141569982

One of the most intriguing hydrogen gas clouds in the entire sky is this giant object in the far southern constellation Carina (the Keel). This nebula and the associated star clusters are located only 13 degrees from the centre of the Southern Cross, which is the well-known star pattern in the constellation Crux (the Cross).

The hydrogen gas in this nebula is excited into an ionized state by the nearby star Eta Carinae, which lies at a distance of 7,500 light years from our solar system. Eta Carinae is one of the most massive, luminous stars known, with a brightness more than 5 million times that of our own Sun.

Eta is a cataclysmic variable star, which has brightened and faded remarkably over the last two centuries. In 1843 Eta briefly became the second brightest star of the sky, before fading well below naked eye visibility after 1856. In recent decades Eta has brightened noticeably, so that now it can be seen easily from a moderately dark sky location, at magnitude 4.2. For more information about this star, click here:

en.wikipedia.org/wiki/Eta_Carinae

This nebula is a nursery of new star formation, which accounts for the many embedded open clusters of stars that are shown in this image. One of them (Trumpler 14), which is the small cluster just slightly to right of and above centre in this view, is extremely young; only half a million years old. It contains about 2,000 stars, and is ~6 light years in diameter.

Apart from the prominent nebula, this region of the Milky Way is strewn with open star clusters that are cosmologically very young, and typically consist of bluish (hot) stars.

For a version of this image with labels and showing constellation boundaries, click on the RIGHT side of your screen, or click here:

www.flickr.com/photos/97587627@N06/54779207955

Here is a photo of the gear that used for astrophotography on this trip:

www.flickr.com/photos/97587627@N06/49017804808

___________________________________________

Technical information:

Nikkor AF-S 70-200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on iOptron CEM40 equatorial mount

Seven stacked frames; each frame:

200 mm focal length

ISO 5000; 1 minute exposure at f/4.5; unguided

Subframes registered in RegiStar;

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

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1988 Austin Metro Vanden Plas 5-door.

Last MoT test expired in December 2007 (SORN).

It failed a test in November 2007 -

Nearside inner rear seat belt anchorage prescribed area is excessively corroded (5.2.6)

Offside inner rear seat belt anchorage prescribed area is excessively corroded (5.2.6)

Offside inner rear subframe mounting prescribed area is excessively corroded (2.4.a.3)

Nearside inner rear subframe mounting prescribed area is excessively corroded (2.4.a.3)

Offside inner rear subframe mounting prescribed area is excessively corroded (2.4.a.3)

and again in June 2020 -

Nearside rear suspension pipe damaged or deteriorated and function is seriously affected excessively corroded (5.3.5 (b) (ii)) - Dangerous

Offside rear suspension pipe damaged or deteriorated and function is seriously affected excessively corroded (5.3.5 (b) (ii)) - Dangerous

All direction indicators not working (4.4.1 (a) (ii)) - Major

Fluid leak harmful to the environment or a risk to other road users coolant leaking excessively (8.4.1 (a) (i)) - Major

Horn not working (7.7 (a) (ii)) - Major

Windscreen washer not working (3.5 (a)) - Major

Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major

Nearside rear outer seat belt anchorage prescribed area strength or continuity significantly reduced (7.1.1 (a) (i)) - Major

Offside rear outer seat belt anchorage prescribed area strength or continuity significantly reduced (7.1.1 (a) (i)) - Major

Service brake efficiency below requirements (1.2.2 (a) (i)) - Major

Taken around 4pm on the first day of March, this is a four-panel mosaic using a colour CMOS camera. Each panel of the mosaic is a stack of the best 40% of 800 subframes.

Peter

Equipment:

ZWO ASI071 MC Pro CMOS camera, 356mm f/10 LX200 SCT, EQ8 mount.

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto) from 00.57 - 01.18 EDT

* Temperature 11 degrees C.

* Total exposure time: 10 minutes.

___________________________________________

Description:

Our home galaxy, the Milky Way, spans the Canadian sky high overhead in the northern hemisphere summer. Dense clouds of stars are obscured in places by winding lanes of dark foreground gas. Many glowing red clouds of hydrogen gas are revealed in long exposure photographs.

The gossamer glow of the Milky Way, which most people never get to see in their lifetimes because of the light pollution thrown into the sky by modern cities, is a thrilling and awe-inspiring sight. But you need to get an hour or more out of the city to be treated to a dark enough sky that will reveal our glorious galaxy.

One of the most distinctive gas clouds is the aptly named "North America Nebula", to the left of centre. 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 WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/27868577990

___________________________________________

Technical information:

Sigma 35 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

Ten stacked frames; each frame:

35 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)

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Eagle Nebula (M16), Swan Nebula (M17), star cluster M18, Sagitarius star cloud and a lot of other structures. For me a surprising new view of Eagle Nebula: a face in a fascinating expression (left side). Mosaic captured last night (2015-08-16) in Tenerife, 1200 m altitude, 2 x 20 x 150 sec subframes, Sony A7s (CentralDs modded and cooled, ISO 4000, IDAS-V4 filter), RASA 11" F2.2, ASA DDM85 unguided, processed in PixInsight, PtGui and PS CC.

Messier 44 - The Beehive Cluster (or also called the Praesepe) is a open cluster that lies in the constellation Cancer, the location of this open cluster also creates a great many photo opportunities as it is located close to the ecliptic (the line that planets, the sun and moon follow across the sky) thus creating many different conjunctions.

Learn more here: www.leisurelyscientist.com/?p=1573

This wide-field image was taken on February 28, 2016 using my Canon 6D, Canon EF 400mm f/5.6L USM and an iOptron ZEQ25 mount. Total exposure time was 30 minutes using 60-second subframes @ ISO 3200, the lens was set at f/6.3 adding some light star spikes to the image. The image was stacked using DeepSkyStacker, stretched with ImagesPlus and edited in Corel PaintShop Pro X5 and Adobe Lightroom.

NASA Astronomy Picture of the Day (APOD) for December 24, 2013;

This image of SH 2-308 was taken in my backyard inTehachapi, Ca., during a cold snap (13 degrees). Details: Televue NP127is at f4.1; Atik 383L+ at -18 deg C; Orion EQ-G mount;TS OAG; Astrodon 3nm filters: Ha(G)(15x20min),SII(R)(3x20min),OIII(B)(18x20min). Because this 'dolphin' or 'gourd' is so strong in OIII, I mixed approximately 15% OIII into the red channel along with 85% SII. To obtain the final colors, I tweaked the color bandwidths and hues of this image using PSE9 [replace color] in an attempt to achieve a pleasing look. I also used AIPWIN to apply Sigmoid Brightness Scaling on each subframe before stacking.

1996 Rover 114 SLi 5-door.

Supplied by Seletar Garage of Mundford (Rover).

Last MoT test expired in July 2016.

It failed a test in September 2016 -

Offside rear subframe mounting prescribed area is excessively corroded sill (2.4.a.3)

Nearside rear subframe mounting prescribed area is excessively corroded sill (2.4.a.3)

Nearside windscreen wiper does not clear the windscreen effectively (8.2.2)

Cumulative 3 hour exposure of the Veil Nebula. Subframes were 5 minutes. Taken with Nikon D810a and a Televue NP101.

NGC 2359 is a fairly faint and hard to get nebula (it is quite low from my location and only visible between trees and houses for a few hours each night and for a couple of months). It also goes by the less glamorous name of the 'Duck' nebula. This way round though it is easy to see how it has been nicknamed 'Thor's Helmet'.

This is a stack of twenty eight-minute subframes in Hydrogen Alpha, taken in one session tonight from almost the moment it cleared the trees to the very last point before it disappeared behind neighbouring houses.

Peter

Equipment: Atik 460EX mono CCD, 0.75 reducer, 130mm triplet APO, EQ8 mount.

Canon 135 f/2 (stopped down to 2.8) lens attached to SX Trius 694 + Baader 7nm Ha filter piggybacked to main scope on a CEM60 was used to capture eleven subframes at 300 seconds each. Stacked in Deepskystacker and processed in StarTools and Photoshop CS2

Taken 07/01/22

It really took a while before this model was done. Actually I wanted to present it at LEGO World 2013 but didn't manage to get it ready. It was shown at LEGO World 2014 in Copenhagen but afterwards I still had to do some minor changes.

Anyhow; the model. In July 2011 I was visiting the UK for my job and I had the opportunity to do some sightseeing. Just before heading for the UK I saw a couple of pictures of NYR's immaculate Kenworth K100E Aerodyne in "B.J. & the Bear: outfit. A couple of months before they imported one for the States and converted it into a heavy recovery vehicle by fitting a Century Rotator 1140. I took a lot of pictures at their yard (and of course I was very please it was there!). Back home I started to find more details about the K100 and Century Rotator and start building a chassis and cab.

I didn't use chrome before and had to start a collection of chrome pieces. I discovered it's rather expensive and I was hesitating whether I should continue the project or not. Mid 2011 I still had the old Scania 141 with Holmes and when I removed the cab of that one and placed the K100 cab onto the chassis I thought it might be better to start with a smaller truck with some chrome parts. And that's how I start building the K100 with Holmes twin boom; www.flickr.com/photos/51102529@N07/sets/72157631712541786/

But I had to continue with the NYR truck. The other K100 did turn out very well and the Aerodyne would be even better (red, white and black are always good to combine). So I continued early 2013. In a meanwhile Brickonwheels started to build his Pete 379 with Century Rotator 1075; www.flickr.com/photos/bricksonwheels/sets/721576345065103...

From a truck photographer I received some very useful pictures of the century rotator, even a few production pictures. He I really could see all details which enabled me to build quite an exact replica. At a heavy recovery show in Belgium in June 2013 I had a closer look to a few examples of Century Rotators which where there.

The model has a full detailed chassis with drive shafts, air suspension, axle stabilizers, etc. etc. When I was building the chassis I recon it would become long, very long. Without the body should say there wouldn't come an end to the chassis … Nice challenge to get it straight without bending. The cab is tilted with an accurate Cummins 6 cylinder in line engine underneath. This one has some chrome touches. The cab interior differs a bit from the old K100; this one is from a later generation, on of the last produced in 2003.

The body work I had to align with the cab (especially with the striping). As I wouldn't change anything to the design of it (it was perfect) I had to modify the body work quite some times. I think I rebuilt it seven of eight times. The body work consist of one center part at the front and two mirrored sections on each side. These are merged to the chassis with traverse beams. On the truck chassis there's a heavy subframe for the crane. I used a classic turn table to attach the crane base. The crane base also was quite a challenge to build; I wanted to have the shapes correctly. While there aren't any blueprints available of the rotator I really had to study all pictures I took. When building the crane I discovered the truck chassis was a bit too short; I disassembled the chassis and stretched it with three studs. It really was a lot of work but otherwise it wouldn't be right.

The boom has three stages and I chose to use panels, brackets and tiles to make these section. In reality there's a little space between the boom and crane base. The outer section is just less than six studs wide, the middle section four studs and inner section a little more than three studs. I was quite expensive to collect all these pieces but I thought it would fit better.

The truck has three winches; two on top of the crane base and one in the body work.

I spent a lot of time on detailing, like the fuel tanks, air compressor, light bar, support legs, storage cabinets etc. etc.

It's my largest solo vehicle so far, apart from the huge Liebherr cranes I built many years ago. In a time span of two and a half years I spent many hours on it. Mostly it really was fun and exciting to build but sometimes quite frustrating. Patience is the magic word!

I'm not sure where the elephant's trunk is supposed to be. It's still a captivating space.

The Seestar ran for about 4 hours to get this image, but at a point the nebula moved behind a tree and I needed to delete about 50 subframes.

The great nebula in Orion captured on 1-29-2017 from the General Nathan Twinning Observatory (GNTO) in Belen, New Mexico using an AT65 apo refractor, an SBIG ST4000XCM camera and a Losmandy G11 mount. Exposures were:

15 x 10"

15 x 1'

12 x 10'

Subframes were combined and processed using Pixinsight. Final tweaks made using Photoshop CS2.

Celestron C8 SCT with Starizona Hyperstar F/1.9 ZWO ASI 294MC Pro, Optolong L-eXtreme filter, ASIAir tracking and capturing on SW EQ6-R Pro

8 hours and 14 minutes total integration,

247 x 120sec subframes

ASI294MC Pro gain 120

Preprocessed in SIRIL and processed in PixInsight final tweaks in Photoshop and Topaz

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Photographed at Algonquin Provincial Park, Ontario, Canada, between 22.17 and 22.30 EDT

(285 km by road north of Toronto)

* Temperature 12° C.

* Total exposure time: 6 minutes.

___________________________________________

Description:

One of the brightest sections in our home galaxy, the Milky Way, is in the small constellation Scutum (the Shield), which appears in the southern sky half way from the horizon to the zenith as seen from southern Canada and the northern United States.

In this area appear many foreground cold, dark nebulae, which obscure the light of the stars beyond. These dark regions were photographed and catalogued by the great American astronomer E. E. Barnard (1857 - 1923) (en.wikipedia.org/wiki/Edward_Emerson_Barnard), and bear the designation "B", numbered from 1 to 370.

Below centre in this view is a favourite target of amateur astronomers with modest telescopes: M11, the "Wild Duck Cluster". This is a rich open cluster of stars that looks like a duck in flight. See en.wikipedia.org/wiki/Wild_Duck_Cluster for more information about M11.

For a wider angle view of the entire constellation and the surrounding area, click here:

www.flickr.com/photos/97587627@N06/28583103700

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

www.flickr.com/photos/97587627@N06/31295105435

___________________________________________

Technical information:

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

Six 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 (levels, brightness, contrast, colour balance)

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Brush under magnifier. Subframing

My latest attempt at this fantastic object, this time a wider field captured with a Canon 400mm f5.6L lens on a QHY168C cooled CMOS camera. 283 x 180s subframes integrated in PixInsight.

Observed from Prachinburi, Thailand.

Processed with VSCO with a5 preset

Reprocess time ! (cloudy here :S )

This data come from a session earlier this year , march 2021

I not 100% satisfied with the way it turned , but still nice

picture :D

Feel free to ask a question and all criticism are welcome 👍

-Equipment-

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

Camera: ZWO ASI533MC Pro at -15°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher EQ5

Filter: Optrolong L-eXtreme

-Acquisition-

Light :50x300s ( 4h ) at Gain:101 Offset:49

Dark-100x300s Flat-30 Bias-100

Date : Take on 3 night 03-04-05 mars 2021

Location : France-Alsace Bortle 4/5

-Software-

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

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

Crop the black bands from the stacking

-Processing

RGB layer

Split RGB channels

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

Starnet++ for remove stars and build a mask nebula

Color Saturation

Curves Tansformation (K,saturation,hue)

Bring back the stars

L layer

Ez_Deconvolution

Ez_Denoise

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

LRGB

Final Curve Transformation

EZ_Star Reduction

Lightroom

Vibrance, clarity , TSL

Save as JPEG

Clear skies !

Two symbols

© All rights reserved.

This image is copyrighted. Please do not use, or post to blogs and other sites without my permission.

This is the Sunflower Galaxy in Canes Venatici, nicely high in our skies at the moment and living up to its nickname.

This image is a stack of 31x5minute luminance subframes with added red, green and blue data taking the total image time to just short of four hours over two recent nights.

Taken through my 130mm triplet APO refractor with an Atik 460EX mono CCD.

Peter

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

between 22.43 and 23.03 EDT

* Altitude of centre of frame at time of exposures: ~35°

* Temperature 17° C.

* Total exposure time: 10 minutes

* 200 mm focal length lens

___________________________________________

Description:

On of the brightest patches in the northern section of our home galaxy, the Milky Way, lies in the constellation Aquila (the Eagle) and Scutum (the Shield). This starcloud contains many open clusters of stars, together with foreground globules of cold dark gas that are the incubators of new star formation.

The central axis or equator of the Milky Way runs diagonally across the upper right of the photo.

One of the most prominent star clusters in this area of the sky is M11, the so-called "Wild Duck" cluster, which is a favourite observing target of amateur astronomers with modest telescopes. M11 is just to the right of and below centre in this image. This is a rich open cluster of stars that looks like a duck in flight. See en.wikipedia.org/wiki/Wild_Duck_Cluster for more information about M11.

For a closer in view of M11 and the surrounding area, made three nights latter with a 660 mm focal length telescope, click here:

www.flickr.com/photos/97587627@N06/48471276616

For a version of this photo WITH LABELS, click here:

www.flickr.com/photos/97587627@N06/49333284961

___________________________________________

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

Ten stacked subframes; each frame:

200 mm focal length

ISO 3200; 1 minute exposure at f/4.5, unguided

(with LENR - long exposure noise reduction)

Subframes stacked in RegiStar;

Processed in Photoshop CS6 (levels, brightness, contrast, colour balance, bright star and M11 masking)

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

1991 Rover Metro 1.1 C 3-door.

Supplied by Mann Egerton of King's Lynn.

Last MoT test expired in March 2020 (SORN).

It failed a test that month -

Rear subframe mounting prescribed area fractured significantly reducing structural strength subframe has crack in the middle (5.3.6 (a) (i)) - Major

Rear brakes imbalanced across an axle axle 2 (1.2.1 (b) (i)) - Major

This lenticular galaxy are located about 80 million lightyears away in the Hydra constellation, visually near M83. At the top of the frame there is a big star (7.7 Magnitude) that has been masked in order to not pay attention to it, because there are hundreds of tiny galaxies disposed in chains, groups, lines, and patterns around all the field of view. Maybe I will make a bigger effort to get a more beautiful image with a much more expensive optics (and bigger telescope) and from a darker sky, but for me today it's ok from my backyard -suburban skies'- observatory and affortable taiwanese scope.

LRGB 8 hours, GSO RC 30 cms, STF8300-AO/8. 12 min subframes. Poor seeing. Process in basic Photoshop. Comments welcome...

La galaxia lenticular NGC5078 a unos 80 millones de años luz, en la constelación de Hydra, cerca visualmente de M83. Arriba en el borde de la foto hay una estrella enorme (visualmente magnitud 7.7) que ha sido enmascarada para no ponerle atención, ya que hay cientos de pequeñas galaxias distribuidas en cadenas, agrupaciones y linealmente por todo el campo visual. Tal vez en el futuro haré otro esfuerzo mayor con esta fotografía empleando un telescopio mucho más caro y grande y tomándola desde un cielo oscuro, pero para mí está bien por ahora desde mi observatorio casero con cielos sólo suburbanos y usando un telescopio baratito taiwanés.

Exposición LRGB 8 hrs total, 12 minutos subframes, GSO RC 30 cms, cámara STF8300/AO-8.

Seeing pobre. Procesado básico en Photoshop solamente.

Comentarios bienvenidos...

This is a slightly different view of the Crab nebula. It is normally a narrowband target and scrubs up well in H Alpha. This mage is simply a colour image taken with a luminance/IR cut filter, giving a more natural view of the nebula. It is 20 individual subframes of 480 seconds each taken over two separate nights' observing in September and October.

Peter

Using my 150 ED apo triplet and 1000D with UHC filter I captured 4 subframes at 25 minutes apiece,stacked in Deepskystacker and processed in Photoshop,colour balanced to bring out the Hubble palette.

EQ 6 powered using EQMOD and autoguided using 60mm Tasco refractor,SX Lodestar and PHD2.

Image taken early hours of 27/12/16

150 ED Apo triplet f7 and Atik 314L with motorised filterwheel.

8 subframes at 7 minutes apiece captured in Ha and again in OIII,stacked in Deepskystacker and colour comined (Ha,OIII,OIII) in Maxim DL4,finished in Photoshop. Image taken early hours of 1/12/16

This isn't deja vue with my last posting. That was Phase 1, this is the completion of Phase 2 in building my Rosette image this time round. The previous posting was a stack of 15 seven-minute subframes in H Alpha. This image is a stack of 36 seven-minute subframes in H Alpha and marks the completion of this narrowband capture that will form one element (albeit the most important) of the final image in due course.

Main differences with the previous image are more detail in the fainter features and a more subtle difference between the light and dark areas.

Peter

Equipment used: Atik 460EX mono CCD, 0.75 reducer, 130mm triplet APO, autoguided with a Lodestar CCD and telescope on an EQ8 mount.

Photo was taken in Portobello, Dunedin, NZ.

from the album "in the gallery" flic.kr/s/aHsky854Lh

Year of first registration: 1992.

The GTM Rossa is a Mini based 2+2 kit car by GTM Cars.[1] The car was based on two front mini subframes, with the steering being locked on the rear subframe. The Mark 1 car was produced from 1987 to 1990, and the Mark 2 car was produced beginning in 1990.

Bron: Wikipedia.org

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

between 22.30 and 22.40 EDT

* Altitude of the cluster at time of exposures: 54°

* Temperature 17° C.

* Total exposure time: 4 minutes

* 660 mm focal length telescope

___________________________________________

Description:

M39 is a very loose and large cluster of quite bright stars that we see against the backdrop of the bright band of the Milky Way as it crosses the northern hemisphere summer sky. It is located about 1,000 light years from our solar system.

M39 was discovered by Guillaume Le Gentil in 1749, and Charles Messier added it to his catalogue of deep-sky objects in 1764.

Open star clusters are young groupings of stars, generally no more than a few million years of age. The individual stars are loosely bound together gravitationally, and gradually move apart over time, making them unrecognizable as a cluster.s

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@N06/48494904262

___________________________________________

Technical information:

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

Eight stacked subframes; each frame:

ISO 3200; 30 seconds exposure at f/5.2, unguided

(with LENR - long exposure noise reduction)

Subframes stacked in RegiStar;

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

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Lake Louise lakeshore trail

A collage utilizing both H-alpha and CaK imaging of our Sun. Subframe positions is "artistic" and does not represent correct orientation compared to Sun - all images are however taken by me excluding the Apollo era (free) picture of Earth showing approximate scale. Pictures taken in southern Finland during summers of 2016 and 2017 as I haven't had time to image at all lately.

See www.flickr.com/photos/130947324@N08/46483974944/ for labels.

Recorded with BW ASI178mm camera, colors added in post production. H-alpha images colored to red and yellow and they are partially inverted to pop out surface details, protuberances and filaments. CaK is colored to blue to mimic imaging bandwidth for CaK.

H-alpha: 656.28 nm (deep red in reality) hydrogen line. Tunable wavelength. Exposure times around 2 ms.

CaK: About 8 nm wide bandpass at the Calcium II K-Line centered around 395 nm (ultraviolet). Exposure time of about 0.8 ms.

Prefilter: Baader D-ERF (with H-alpha), Baader AstroSolar film (with CaK)

Scope: TS Express 80/480 mm FPL53 APO

Filter: Daystar Quark or Baader CaK

Camera: ASI 178mm with 0.5x reducer

DIY Arduino based focuser motor control

Mount: Celestron AVX (equatorial mount), StarAdventurer

Software: FireCapture, SharpCap, Autostakkert!, ImPPG and Photoshop CC.

Typically stacked a best few percents of 5000 images to create each of the separate photos. Full disk H-alpha sun is a composite of several sub images. I roughly estimated that I collected about 180 000 frames and 775 GB of uncompressed AVI video as raw material. Final stacked image number should be close to 4000 in that composite.

Used my 6" f7 apo triplet and DSLR with UHC filter to capture 5 subframes at 15 minutes each. Stacked and darkframe (7) calibrated in Deepskystacker and processed in Photoshop.

Image taken early hours 6/11/16