View allAll Photos Tagged Subframing
Skywatcher 72ED apo with field flattener,SX Trius 694/filterwheel/OAG (Lodestar) riding on CEM60.
Six 10 minute subframes captured through Ha and OIII filters,stacked in Deepskystacker and colour combined (Ha,OIII,OIII) in Maxim DL4. Processed in Astroart 8 and PS CS2.
Taken 31/10/21
Stack of the best 42 90 s subframes with an Optolong Luminance filter, taken from 2023-03-25 0526-0721 UT with a Celestron Edge HD 925 at focal length 1530 mm and an Atik 414-EX camera. The position of 2023dbc is indicated with the white line.
This is from my light polluted backyard in Long Beach, CA. I mostly wanted to see if I could image a supernova fainter than magnitude 16 from my backyard. Looks like the answer is yes.
2023dbc is a Type Ic supernova. That means the progenitor had shed both its hydrogen and helium layers before exploding. This means the progenitor would have been a Wolf-Rayet star.
Preprocessing in Nebulosity; registration, stacking, and initial processing in PixInsight; the background of light pollution was knocked down in Photoshop.
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 22.58 and 23.09 EDT
(285 km by road north of Toronto)
* Temperature 17° C.
* Total exposure time: 6 minutes.
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Description:
The centre of our home galaxy, the Milky Way, lies in the constellation Sagittarius, which in the northern hemisphere summer lies low in the south at midnight.
In this view appear many favourite targets of amateur astronomers with modest telescopes, including the large glowing Lagoon Nebula at the lower right.
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@N06/28589630170
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Technical information:
Nikkor AF-S 70 - 200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Six stacked frames; each frame:
135 mm focal length
ISO 4000; 1 minute exposure at f/4.5; 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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This nebula is rich in ionized hidrogen and some interesting dark bands. Telescope GSO RC 30cms, camera STF8300/AO-8, 16min subframes, 5 hours total in Ha-L-RGB composite from my backyard homemade observatory at La Colonia, Illapel, Chile. Take care and have a good day!
Esta nebulosa de emisión ubicada en Puppis es rica en hidrogeno alfa y bandas oscuras. Imagen de 5 horas en Ha-L-RGB, telescopio GSO RC 30cms, camara STF8300/AO8, desde mi observatorio hecho en casa en La Colonia, Illapel, Chile; saludos y cuÃdense, que tengan un buen dÃa...
Watch out! Fire truck in a hurry to help!
I present to you my version of the fire truck of the 60s. Its distinguishing feature is a nice design, detail, a fairly simple but intricate design and rich functionality.
The machine is equipped with everything necessary, there is a water monitor, hoses, ladder, tool holders, boxes. There are two taps for water supply.
In detail even the bottom, deploying the machine you will notice the imitation of the subframe and the drive system.
Inside you can place a minifigure.
The fire engine blends well with the modular building 10197 and fits in the garage.
Assembled from 322 existing parts.
As a kid I read the book and saw the movie of the Day of the Triffids. Could be where those alien creatures were from although the spelling differs slightly.
Seestar S50
329 ten-second subframes.
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Photographed from mid-town Toronto, Canada, at 21.05 EDT (Venus altitude: 28.3° | Sun 14° below the horizon)
* Temperature 10° C.
* Total exposure time: 17.5 seconds
* 1253 mm focal length telescope
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Description:
Venus is always the most brilliant planet in the sky, and the third brightest celestial object (as seen from Earth) after the Sun and Moon.
The star cluster M45 (commonly known as the Pleiades or the "Seven Sisters") is the best known star cluster in the sky, and is easily visible to the unaided eye, even from light polluted cities (if the sky is very clear).
During this week, Venus approaches very close to M45, and the pair of objects can be seen high in the western sky after sunset, and even into complete darkness.
In this view, composed of 7 stacked identical exposures of 2.5 seconds each, brilliant Venus is at the right side, and the stars of the Pleiades are strewn across the frame to the left.
With long exposures from a good dark sky location, distinctive blue reflection nebulosity surrounds the Pleiades, as seen in this photograph from Sept. 2017:
www.flickr.com/photos/97587627@N06/36660736734
For a version of this photo WITH LABELS showing star names and brightnesses, and the star pattern of the Pleiades, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/49730260383
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Technical information:
Nikon Z7 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Sky-Watcher AZ-EQ6 SynScan mount.
Seven stacked subframes; each frame:
1253 mm focal length
ISO 800; 2.5 seconds exposure at f/8, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6
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Used my 6" f7 apo triplet refactor and 1000D dslr with light pollution filter to capture 10 subframes at 3 minutes each. Stacked in Nebulosity 4 and processed in Photoshop.
Image taken early hours of 23/10/16
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.
1997 Jaguar XK8 4 Litre auto.
Previously registered J20 AKS, JR 7237, J853 GGP, VOT 92 and P804 UAV.
Last MoT test expired in November 2015 (SORN).
It failed a test that month -
Nearside rear subframe mounting prescribed area is excessively corroded outer sill area (2.4.a.3)
Offside rear subframe mounting prescribed area is excessively corroded outer sill area (2.4.a.3)
Nearside brake pipe excessively corroded front to rear (3.6.b.2c)
Full write-up here: theastroenthusiast.com/orion-widefield/
Cradled in cosmic dust and glowing hydrogen, stellar nurseries in Orion the Hunter lie at the edge of a giant molecular cloud some 1,500 light-years away. Spanning nearly 25 degrees, this breath-taking vista stretches across the well-known constellation from head to toe (left to right). The Great Orion Nebula, the closest large star forming region, is right of center. To its left are the Horsehead Nebula, M78, and Orion’s belt stars.
Equipment:
Nikon D800
50mm f1.4 lens
GEM 28
NINA
Nikonhacker
Acquisition:
ISO 800, F2.8
Taken from a bortle 1 zone in Northwest CT
155 x 240s subframes (10 hours) – Taken on 12/26/2022, 12/27/2022
Processing:
Pre-processing and stacking
- All subframes were calibrated and normalized through WBPP
- The subframes were debayered and split into monochrome channels
- The subframes were registered with distortion correction
- the subframes were registered based on a PSF snr estimate
- The subframes were normalized using local normalization
- Each channel was integrated separately using the ESD clipping algorithm
Preparation of all frames:
- Stacking artifacts were cropped
- the RGB channels were combined to create an RGB image
- the RGB image was plate solved
- DBE was applied iteratively
- the RGB image was photometrically color calibrated
Linear noise reduction
- A low-contrast mask was applied
- Two iterations of TGV noise reduction were applied, one targeting high-frequency noise and one targeting low-frequency noise
- A medium-contrast mask was applied
- MMT targeting all 8 scales was applied to remove large-scale noise
Stretching
- The stars were seperated from the nebula using Starnet 2
- the RGB image was stretched using Arcsinh stretch
Non-linear adjustments:
- LRGB combination
- HDR, LHE, and curves to increase local contrast
- MLT was applied targeting 5 layers of luminance
- The background level was set to .09
- the stars were stretched using Arcinh stretch
- The image was relinearized and the stars were added back
Website: theastroenthusiast.com/
Instagram: www.instagram.com/the_astronomy_enthusiast/
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 00.12 and 00.45 EDT
(285 km by road north of Toronto)
* Altitude of the nebula at time of exposures: 55°, decreasing to 50°
* Temperature 5° C.
* Total exposure time: 15 minutes
* 2483 mm focal length telescope
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Situated in the heart of our Milky Way galaxy as it passes directly overhead during the summer in the northern hemisphere, the Crescent Nebula is a half ring of ionized hydrogen gas, which glows with a characteristic red-pink colour. The nebula has an angular size of 20' x 10', which makes it about 1/3 the apparent size (in area) of the Moon as seen from Earth.
From Wikipedia:
The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
It is a rather faint object located about 2 degrees SW of [the bright star] Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".
Click here to see a wider angle view of this region, which shows adjacent larger diffuse hydrogen gas clouds in the constellation Cygnus:
www.flickr.com/photos/97587627@N06/29549773051
Click here to see the equipment used to photograph this galaxy:
www.flickr.com/photos/97587627@N06/29939255555
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Nikon D810a camera body at prime focus of Meade 30 cm (12") LX-850 Schmidt-Cassegrain telescope, mounted on Astrophysics 1100GTO equatorial mount
Fifteen stacked frames; each frame:
2483 mm focal length; ISO 10,000; 60 seconds exposure at f/8, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness, contrast, levels, sharpening)
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I took an image of the Heart Nebula back in the autumn of 2013. While working on that image I was struck by the beauty of IC 1795, the appendage protruding from the "point" of the heart. At that time I acquired a few Ha subframes of IC 1795, but didn't get enough for an image. It's been on my unfinished business list since then.
This year while I was tuning the 16" I thought I'd use some of the time I was testing tracking accuracy to try to check IC 1795 off my todo list. This is the result.
The Heart Nebula itself is IC 1805/SH2 190. The gorgeous center of this nebula is a complex structure that I interpret as being a typical dust pillar, but seen from above rather than the side. If this is the case, then Melotte 15, the star cluster powering this entire complex, must be in front of the central pillar complex. Perhaps the Heart Nebula isn't so heart-shaped at all. It's a more typical hollow cavity, with an incredibly dense pillar on its far inner wall.
There is a considerable amount of oxygen and sulfur in this nebula. This indicates that it is older and much more evolved than most starbirth regions where these elements are much more rare. This is supported by the relative sparseness of Melotte 15. Perhaps many of its original members have been gravitationally ejected from the system and have entered the general population of the galaxy.
Sometimes when I take an image, I ultimately end up rather unimpressed by the result. Not too many people see those results. This one, though... I'm really pleased with this one. This goes into my picture book, and maybe even on my wall :)
This is 28x900Ha, 12x900OIII, and 13x900SII for a total of 13,25 hours of imaging on the Twin City Amateur Astronomers - TCAA.16" AG Optical Systems imaging Harmer-Wynne.
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
1997 Citroen Xantia 2.1 TurboD VSX.
Scrapped.
Last MoT test expired in October 2019.
It failed a test that month -
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside front anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) - Major
Running through a film in a short timeframe means going to places you can be certain of a few shots. Old Fergie's cottage (Glenside) in Fin Glen meets that description nicely. It's sad that he never fulfilled his dream to renovate this ruin, but the place has loads of character.
I didn't take notes as I was taking these shots, but I think this was taken with the Auto-Takumar 55/1.8.
Straighten and crop a little in PP. Darkened LHS of window frame slightly.
Triumph TR7 (Grinnall V8) Convertible (1976-81) Engine 3528cc V8
Production 350 approx
Registration Number KNA 925 V (Manchester)
TRIUMPH ALBUM
www.flickr.com/photos/45676495@N05/sets/72157623847263736...
Nine years after the the TR7 had ceased production, another British manufacturer, Grinnall Specialist Cars modified existing TR7 and TR8 cars. TR7 cars were upgraded with TR8 subframes and dash. They then installed V8 engines (optionally bored to larger capacities), and other parts like suspension, gearbox and brakes from the Rover SD1. The front and rear wings were widened to match the SD1 axles and suspension. 350 convertible cars were produced, each with Grinnall badging
The Triumph TR7 is a sports car manufactured by BL (British Leyland) at Speke, Liverpool, Canley, Coventry and Solihull, West Midlands from September 1974 to October 1981. The car was launched in the United States in January 1975, with its UK home market debut in May 1976
Designed in house by Harris Mann, who also designed the Princess, it has a distinctive wedge shape, and with a swage line sweeping down from the rear to just behind the front wheel, it was advertised as . The Shape of Things to Come .The car has an overall length of 160 in (410 cm), width of 66 in (170 cm), wheelbase of 85 in (220 cm) and height of 49.5 in (126 cm). The coupé has a kerbside weight of 2,205 lb (1,000 kg).Because of proposed US legislation on roll-over protection at the time of its launch, the TR7 was not initially offered as a Convertible, In early 1979, Triumph belatedly introduced a convertible version, called the TR7 DHC (Drophead Coupe)
Power is provided by a 1,998 cc eight-valve four-cylinder engine that shares the same basic design as the Triumph Dolomite 1850 engine, albeit increased to 2 litres and fitted with larger carburettors, mounted in-line at the front of the car. Power is 105 bhp
For export to the US market, Triumph created a much more powerful Triumph TR8 model in 1977/78, which was a TR7 with a 135 bhp (101 kW) 3.5 L Rover V8 engine. While some genuine TR8 models stayed in Britain
Diolch am 92,069,946 o olygfeydd anhygoel, mae pob un yn cael ei werthfawrogi'n fawr.
Thanks for 92,069,946 amazing views, every one is greatly appreciated.
Shot 17.04.2022 Weston Park (Classic Car Show), Weston-under-Lizard, Salop 157-363
1991 Ford Sierra Sapphire 1.8 GLX.
Supplied by Evans Halshaw (Ford).
Last MoT test expired in January 2007.
It failed a test in October 2007 -
Offside Front coil spring cracked (2.4.C.1a)
Nearside Rear Subframe mounting prescribed area is excessively corroded (2.4.A.3)
Telescope: Celestron 11" EdgeHD + HyperStar (F/2)
Camera: QHY23M
Mount: CGEM-DX
HA- 10 subframes x 300 seconds each- mapped as green channel
OIII- 10 subframes x 300 seconds each- mapped as blue channel
SII- 10 subframes x 300 seconds each- mapped as red channel
2h 30m total
1999 Vauxhall Astra 1.6 Club 4-door.
Last MoT test expired in December 2021 (SORN).
It failed a test in November 2021 -
Nearside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
1992 Ford Fiesta 1.3 LX 3-door.
Supplied by Trimoco of Chelmsford.
Scrapped.
Last MoT test expired in July 2015.
It failed a test in June 2015 -
Offside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside rear subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Offside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Spare wheel carrier insecure (6.4.2)
This is a test for FOV with the AT65EDQ w/the QHY9M, I need a ton more subframes. Rotated for correct orientation
Lum 3x600 (no bin)
RGB 3x300/each binned 2x2
AT65EDQ
QHY9M
Comet C/2016 R2, after a night of high fog and high humidity. Nevertheless, 20 subframes each were still usable. Here is the stack of monochrome images with blue filter. Later'll combine with the RGB subframes.
20 x 120 sec, blue filter, Hyperstar C14, ASI 1600 (cooled - 35°), Tenerife 1180 m a.s.l. 2018-01-09 1h UT
1997 Citroen Xantia 2.1 TurboD VSX.
Scrapped.
Last MoT test expired in October 2019.
It failed a test that month -
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside front anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) - Major
This is an entirely new image from me using data captured on the nights of 29/30 December and 30/31 December. I wasn't totally happy with my last posting of these two beautiful and stunning nebulae, so I started again in the hope of bringing out more detail. The left-hand image is a Hydrogen Alpha stack of eighteen seven-minute subframes. The right-hand image has used the Hydrogen Alpha data as the luminance and red then I have added green and blue data. The final colour has been balanced to bring out the contrast in the Flame nebula. A total image time of 220 minutes.
Peter
Equipment used: 130mm triplet APO, Atik383L+ mono CCD, HA, Green and Blue filters, EQ8 mount.
Integration of 1974x20s subs (= 10.97 hours) with Seestar S50* in Washington D.C. Apr. 5-6, 7-8, 2026.
Mounted the Seestar, with a diffraction spike mask in front of the lens, on a TH-10 fluid head; put it in equatorial mode; and did a polar alignment to less than a degree in polar deviation in both RA and Declination coordinates. Dew heater = On. Light Pollution filter = Off.
Ran Fast Batch Preprocessing (FBPP) script with drizzle enabled in PixInsight** to integrate the subs to get a master image. Rather than let FBPP use the auto option for the reference frame to align the light frames, the registration reference image file was manually selected to be the sub with the highest weight. That sub was identified by applying Subframe Selector to the subs using the weighting expression (15*(1-(FWHM-FWHMMin)/(FWHMMax-FWHMMin)) + (15*(1-(Eccentricity-EccentricityMin)/(EccentricityMax-EccentricityMin))) + (20*(PSFFlux-PSFFluxMin)/(PSFFluxMax-PSFFluxMin)))+50.
Postprocessed the above master image as follows:
Applied Gradient Correction > Blur Xterminator > Spectrophotometric Color Calibration*** > Blur Xterminator > Delinearization by transferring image data from Screen Transfer Function to Histogram Transformation (HT) > Dynamic Crop.
In view of the brightness of the galaxy’s core HDRMultiscale Transform (HDRMT) was applied to a clone of the above-processed master image to compress its dynamic range. Pixel Math was then used to blend equal amounts of the HDRMT-modified clone and the unmodified master image.
Applied Star Xterminator to split the above result into starless and stars-only images. Created a mask from the starless image as follows: extracted the L-channel using Channel Extraction; applied Binarize to adjust the size to cover the target image area; and applied Convolution to blur the mask’s edges. Applied the resulting mask back on to the starless image to protect its background. Applied Local Histogram Equalization (LHE) to adjust local contrast and visibility and Noise Xterminator (NXT). The stars-only image was untreated. Applied Pixel Math to combine the processed starless and stars-only images to create a rejoined image.
Inverted the mask to protect the galaxy’s core and applied NXT and HT to the background to adjust shadows and midtones. Reinverted the mask to protect the background and applied LHE, Curves Transformation (to adjust saturation, colors, and boost intensity), and NXT. Inverted the mask once more and applied HT to the background.
* Seestar S50 is a 50 mm f/5, i.e., 250 mm focal length, apochromatic triplet telescope with a built-in camera based on a Sony IMX462 sensor. It has an optional anti-dew feature and a built-in OIII 30nm / Hα 20nm duo-band light pollution filter.
** PixInsight Core Version 1.9.3 Lockhart, build 1646.
*** For SPCC’s R, G, B filter settings when the LP filter is off I used Sony Color Sensor (R-, G-, B-) UV/IRCUT.
Dates: 23-24, 26-28 April 2025
Location: Washington D.C.
Equipment:
ASI 2600MM Pro (monochrome) camera
Chroma 36mm LRGB Filter Set
WO Fluorostar 91mm f/5.9 triplet APO refractor with Adjustable Field Flattener 68III
iOptron GEM28-EC mount
Data and exposure times:
Data was acquired as LRGB images with the following exposure times:
14.11 hours (242x210s subs) with Luminance filter (L).
3.50 hours (60x210s subs) with Red filter (R).
3.56 hours (61x210s subs) with Green filter (G).
3.44 hours (59x210s subs) with Blue filter (B).
Atmospheric conditions:
The shown image was developed from data acquired in a Bortle Class 8 area (i.e. in an environment experiencing a degree of light pollution typical of a city) where the sky quality during observation was such that both transparency (i.e. the level of atmospheric clarity) and seeing (i.e. the level of atmospheric turbulence) varied from average to below average.
Processed in PixInsight.
Preprocessing notes:
Created LRGB "masters" by Calibration, Cosmetic Correction, Weighted Subframes, Star Alignment, and Integration.
Postprocessing notes:
a. Dynamic Cropping of LRGB masters each to the same dimensions having a 3:2 aspect ratio.
b. Applied a Screen Transfer Function to view the resulting images.
c. For the L master: Applied a Dynamic Background Extractor and saved the settings to be used later when applying a DBE on the RGB masters.
d. Applied BlurXT and NoiseXT.
e. Applied a Histogram Transformation. This step generated a nonlinear image which was saved as a postprocessed L image.
f. "Built" a color image from the R, G and B masters by using LRGB Combination and applied a DBE to the color image using the same DBE settings as used for the L master.
g. Since a color image is involved, this necessitated the application of Background Neutralization and Color Calibration to the result from step f above.
h. Applied BlurXT, NoiseXT and a Histogram Transformation. Saved the nonlinear result as a postprocessed RGB image.
i. Used LRGB Combination to "apply" an instance from the postprocessed L image to the postprocessed RGB image.
j. Applied StarXterminator to create starless (i.e. containing the target image - in this case M51) and stars-only images.
k. Processed the starless image, after applying a range selection mask to protect the background area, using Local Histogram Equalization, Curves Transformation and Color Saturation. Curves Transformation was used only to boost the saturation whereas Color Saturation was used to enhance specific color hues.
l. Applied SCNR (Subtractive Chromatic Noise Reduction). Removed mask and used an expression in Pixel Math to combine the result from step k above with the stars-only image from step j.
m. As a final step, after protecting the target image with a Star Mask, applied a (star reduction) Morphological Transformation to the result from step l above.
1997 SEAT Toledo TDi SXE.
Scrapped.
Last MoT test expired in January 2014.
It failed a test that month -
Nearside headlamp not working on dipped beam (1.7.5a)
Offside registration plate lamp not working (1.1.c.1d)
Offside rear position lamp(s) incorrect colour (1.1.a.3e)
Shock absorber has an excessively worn bush (2.7.4)
Nearside rear upper suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear upper suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Nearside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Offside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Nearside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Offside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside rear suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear suspension component mounting prescribed area is excessively corroded (2.4.a.3)
The NGC 5367 reflection nebula in Centaurus. This is a LRGB composite, for about 8 hours, 16 minute subframes. TEC 140 refractor scope, camera STF8300/AO-8, from my backyard observatory, suburban skies, some airglow present. There is a rare shape of the interestelar dust at the right bottom...the little galaxy at the center have a tinny old supernova just visible...
La raramente fotografiada nebulosa de reflección NGC5367 en Centauro, 8 horas de exposición, LRGB, subframes de 16 minutos, telescopio refractor apo TEC 140, cámara STF8300/AO-8, desde mi observatorio en casa, cielos suburbanos, bastante airglow presente. Al costado derecho abajo se ve una zona de polvo estelar con forma llamativa, casi en angulo recto...la pequeña galaxia en el medio abajo tiene una supernova antigua apreciable al lÃmite...
Comet 2017 E4 Lovejoy from this morning. During only half an hour the the morphological changes in the tail are enormous. I was very happy the capture the evolution of a disruption event finally visible in the right most image. Each of these 12 images are a stack of 5 subframes with a total exposure time of 150 sec each. The most important for me is to realize, what happens, when you use total exposure times of 10 or 20 or 30 minutes and stack these subframes. There is a smear effect resulting in 'impressiv' tails which are totally fake (If you would stack 10 pictures of a jumping person, you would not be able to see the person but instead a smeared tall something). I myself made this mistake in the past and I saw the same artificial tails in the images of some well known comet photographers in the past days. I think we have to rethink our imaging techniques in regard of the total exposure time at least in the case of comets with such a fast changing morphology. Please follow this link to see the details very clear from one 2 1/2 minute step to the next one.
Technique: 12 x 5 x 30 sec. Hyperstar 14" F1.9. Sony A7s (CentralDS), ISO 3200, UV/IR cut filter. FOV 1.7° (horizontal). 2017-04-04 6:26h - 6:56h UT, Tenerife 1180 m altitude.
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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: 10 minutes.
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Description:
Our home galaxy, the Milky Way, runs through the constellation Scutum (the Shield) high in the northern hemisphere summer sky. Dense clouds of stars are obscured in places by winding lanes of dark foreground gas.
In the middle of the frame, just below centre, is a tightly packed open cluster of stars, called M11, or the "Wild Duck" cluster, because of its appearance in a telescope.
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Technical information:
Nikkor AF-S 70 - 200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Ten stacked frames; each frame:
145 mm focal length
ISO 5000; 1 minute exposure at f/4.5; 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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My first try at shooting the orion nebula. This was imaged on October 5, 2008 with a Canon 300D attached to a Celesron C6-N at prime focus. Telescope was guided using a Meade 70AZ-Z and SPC900NC webcam using PHD Guiding.
Specifics:
14 x 120s subframes ISO800
10 x 30s subframes ISO800
Subframes were stacked using Iris. Final processing was done in PS CS3.
The planetary nebula NGC 3242, also knowed as "Ghost of Jupiter", a small, difficult and interesting object in Hydra constellation. This target needs short subframes (3min) because long ones burn the core of the planetary. About 30 subframes in LRGB, GSO 30 cms scope+STT8300/AO-8 unit, from La Colonia, Illapel, Chile; Suburban skies.
La nebulosa planetaria NGC3242 en Hydra, también llamada "el fantasma de Júpiter", por su aspecto al mirarla al ocular. Es un blanco pequeño y difÃcil. Requiere subexposiciones cortas (3min) pues las largas usuales queman el núcleo. Telescopio GSO de 30cms+cámara STT8300/unidad AO-8, desde La Colonia, Illapel, Chile. Cielos suburbanos.