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Friday, February 15, 2019

 

70% Waxing Moon crater studies


Celestron 9.25 SCT AVX, 2 x Televue Barlow, ZWO ASI120MM camera, 4000 or 5000 images captured in Firecapture 2.5x64, 750 stacked and aligned in AutoStakkert!2.3, wavelets in Registax 6, then edited in Adobe Elements 11

Click on an image to get a closer view
Clavius


Copernicus


Longomontanus


Plato


Colin Miles

Thursday, February 14, 2019

 

Gravitational Waves

Tonight Dr Katherine Dooley of Cardiff University gave us an very interesting and very accessible talk on the new branch of astronomy - Gravitational Waves. They occur due to the collision of black holes or neutron stars and maybe other objects - yet to be determined. Their existence was predicted by Einstein, but they are very hard to detect as the effect on Earth is so small.


The first gravitational waves were confirmed to have been detected in 2015. When a black hole of 29 and 36 solar masses collided, they made a mass of only 62 masses - the other 3 solar masses were emitted as gravitational waves. In 2017, a very large signal was identified to be the collision of two neutron stars.


So far 10 black holes and 1 neutron star pair have been detected. With 70 detectors worldwide now and a plan to put a detector in orbit, away from the vibrations of Earth-based activities (seismic activity, human activity etc) there is much more to from this new branch of astronomy.

Thank you very much again, Katherine!

Tuesday, February 5, 2019

 

IC443, the Jellyfish nebula in narrowband.

Starwave 70 EDT scope and Atik 428 camera. 12 x 900s H-alpha, 10 x 900s each of Olll and Slll.  Stacked in Maxim DL then post processed in Pixinsight. I've used the Hubble palate, Sll to red, H-alpha to green and Olll to blue.

Click on the image to get a closer view

The Jellyfish Nebula


Anne Startup


Monday, February 4, 2019

 

Orion nebulae

A Pentax Kx DSLR was fitted with a 2" nose piece and a 2" light pollution filter, and placed at the Newtonian focus of a130mm, f/5 Newtonian.
34 x 30s exposures were captured at ISO 1600 with matching dark-frames. The images were stacked in Deep Sky Stacker running in wine and post processed in the Gimp 2.10, Neat Image and FastStone running in Wine.

Click on the image to get a closer view


Steve Wainwright
 

Deep Sky Sketches. Galaxies in the bowl of Ursa Major

A 150mm, f/5.9 refractor was used with a Watec camera as an electronic eyepiece to make these sketches.

Click on a sketch to get a closer view







Jim Startup

Sunday, February 3, 2019

 

M1 The Crab Nebula

Celestron 9.25 SCT AVX, 0.63 Focal Reducer, Celestron Off-Axis Guider, ZWO ASI120MM guide camera, 11 images at 180 secs exposures captured with the Orion G3 DeepSpace Colour CCD camera, then processed in Orion Studio Software, and then in Adobe Elements 11.


Colin Miles
 

The Orion Nebulae

A Nikon D5100 DSLR was fitted with a 2" adapter and a light pollution filter and attached to  Bresser Messier ED 120mm f/5.4 refractor, mounted on a Celestron AVX EQ mount.

25 3s exposures of The M42 region of Orion were captured at ISO 1600.
The images were stacked in Deep Sky Stacker running in Wine, and post processed in The Gimp, 2.10, Fitswork, FastStone and Neat Image.

Click on the image to get a closer view.

 
The Running Man nebula is also visible at the top of the image.

The scope and camera setup


Steve Wainwright & Nicola Mackin
 

Deep Sky Sketches

An f/5.9 refractor was used with a Watec camera as an electronic eyepiece to make the sketches.

Click on a sketch to get a closer view










Jim Startup

Saturday, February 2, 2019

 

IC342 the Hidden Galaxy

Imaged with a Starwave 70EDT, Atik 428 on my EQ6. I took 28x300 luminance, 8x300 red, 5x300 green and 6x300 blue subframes. Stacked in Maxim dl, Then processed in Pixinsight.

Click on the image for a closer view

IC342 the Hidden Galaxy


Anne Startup

Thursday, January 31, 2019

 

The Cone Nebula

Imaged using my Altair Starwave 70 EDT and Atik 428 camera. Stacked in Maxim dl and then further processed in Pixinsight. This included using a narrowband combination script to add the Ha to the red channel to improve hydrogen recording. I combined the luminance image as a layer in Photoshop.

Click on the image to get a closer view

The Cone Nebula


Anne Startup
 

Deep Sky Sketches

An f/5.9 refractor was used with a Watec camera as an electronic eyepiece to make the sketches.

Click on a sketch to get a closer view






Jim Startup

Wednesday, January 30, 2019

 

26% waning, crescent daylight Moon

A Panasonic Lumix DMC-FZ72 bridge camera with 60x optical zoom was mounted on a static tripod and 30 images of the 26% waning Moon were captured in bursts of 3. The Moon was in the dawn sky and clouds quickly came in and stopped further capture.
The images were precisely cropped and stacked in the Stacking AstroCrop for Linux prototype, which is not yet released.

Single, un-cropped  image


The resulting stacked image was wavelet processed in Registax 5.1 running in Wine, and post-processed in the Gimp 2.10.

Stack of 35 images


Steve Wainwright and Nicola Mackin

Tuesday, January 29, 2019

 

Automatic stacking with a prototype of Stacking AstroCrop for Linux

Nicola has un-commented some stacking code that was present in the original AstroCrop for Linux, but not active in the released version. In addition she has implemented the saving of the stacked image as a 16 bit Tiff file aligned to the most significant bit.

Splash screen of AstroCrop for Linux.



The software was initially tested on some lunar data from March 4th, 2015, using a Panasonic Lumix DMC-FZ72 bridge camera on a static tripod.

A single unprocessed Bridge camera image of the Moon


Stack of 60, precisely cropped images of the Moon


On Jan 28th, 75 bridge camera images were captured of the Sun using a Baader solar filter, in bursts of 3, with a Panasonic Lumix DMC-FZ72 bridge camera at 60x optical zoom, using a static tripod.

A single unprocessed Bridge camera image of the Sun


Stack of 75, precisely cropped images of the Sun


AR2733 is clearly visible.

The stacking version of AstroCrop for Linux is not yet released as a quality estimator will be implemented for selecting the best images for stacking.

Steve Wainwright & Nicola Mackin

Monday, January 28, 2019

 

Observing at the SAS Fairwood observatory Jan 28th

Despite a deteriorating forecast, some observing was carried out at the observatory.








Thursday, January 24, 2019

 

Messier and the Messier Objects


Great to see a lot of visitors in our meeting tonight including students from UWTSD. Welcome :)


Steve started our meeting by presenting his experiments with using astronomical cameras in conjunction with the Raspberry Pi. He also showed a collection of members' photos of the January 24th Lunar Eclipse (see further down the blog for photos)

Photograph of the audience taken by one of two cameras running simultaneously on the Rasberry Pi.


Our main speaker this evening was Martin Griffiths of Dark Sky Wales. He gave us an interesting and often amusing talk about Messier and his astronomical discoveries.




Thank you Martin for a great talk! Our next meeting will be on February 14th when Dr Katherine Dooley (Cardiff University’s School of Physics and Astronomy), a Kavli Frontiers of Science Fellow and winner of the prestigious Philip Leverhulme Prize will give a talk entitled 'Listening to the universe: the new era of gravitational-wave astronomy.' All welcome.

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