Friday, 10 January 2025

Nebulae in Orion's lower limb.

This image was taken on two separate nights under bright gibbous moon light ,stars were only visible down to about magnitude 4.

I was using a 200mm F/4 Pentacon lens piggybacked on my ten inch reflector mounted on a Vixen Atlux mount with PHD auto guiding. The camera was a Atik 383L mono CCD combined with Astronomik RGB and narrowband filters attached to the camera lens.

I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image. The total exposure time was four hours and 45 minutes using a H Alpha filter, 20 minutes using a blue filter, 30 minutes using an O111 filter and 30 minutes using an S11 filter. A total exposure time of six hours and five minutes. 


Hubble Palette

RGB

RGB plus narrowband


Monday, 6 January 2025

Barnard's loop

This image of Orion contains  lots of nebulousity, Barnard's loop. M42 the Orion nebula, The Horeshead Nebula,  The Flame Nebula ,M78 and the Rosette Nebula .

I piggybacked an Atik 383L mono CCD camera with a 35mm camera lens on my ten inch reflector mounted on a Vixen Atlux mount. I captured 60 second sub frames with matching dark frames to reduce the effect of noise in the final image  .

I also attached filters to the lens .

The total exposure time was 90 minutes using a H-Alpha filter, 120 minutes using a S11 filter, 30 minutes using an O111 filter, 25 minutes using a H-Beta filter and 35 minute using a blue filter .

The equipment


Orion nebulosity with Barnard's loop



Friday, 3 January 2025

VDB152 . or Barnard 175.

This cloud of nebulosity lies in the constellation of Cepheus the King. The sky conditions were very clear with no moonlight, stars were visible down to about magnitude 4.7. I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband and RGB filters and an Atik 383L mono CCD camera. I captured five minute sub frames, dark frames, flat field frames and dark flat frames with the camera set on X2 bin mode.

This increases the sensitivity of the camera, therefore reducing the total amount of exposure time.

The exposure time was 80 minutes using a blue filter, 30 minutes using an O111 filter and 150 minutes using a H-alpha filter .

A total exposure time of four hours and twenty minutes.

Barnard 175



Friday, 20 December 2024

IC 1396, The Elephant Trunk nebula.

This patch of nebulosity lies in the western part of the constellation of Cepheus at a distance of about 2,500 light years.

I took this image under clear sky conditions with no moonlight, stars were visible down to about magnitude 4.6 . 

I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband filters and an Atik 383L mono CCD camera. 

I captured five minute sub-frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image.

The exposure time was 120 minutes using a H-alpha filter, 40 minutes using an O111 filter, 40 minutes using a S11 filter, 25 minutes using a H Beta filter and 20 minutes using a blue filter .

A total exposure time of four hours and five minutes .

Hubble palette



RGB



RGB plus Hubble palette


New and old data combined, using two telescopes a ten inch F/4.8 reflector and a four inch f/6.3 refractor.




Friday, 29 November 2024

NGC7023. The Iris Nebula.

This patch of nebulosity lies in the western part of the constellation of Cepheus. The conditions on that evening were very clear and cold with no moonlight, stars were visible down to magnitude 5.

I was using my 10 inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik filters. The filters were H Alpha for red, O111 for green and a blue filter.

I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image.

The total exposure time was 90 minutes using a blue filter, 30 minutes using an O111 filter and 120 minutes using a H Alpha filter. 

The Iris nebula


This image contains data from two telescopes , an 80mm f/6.3 refractor and a ten inch f/4.8 reflector. NGC 7023, vdb141



Saturday, 23 November 2024

Vdb 141. The Hanging Ghost Nebula

This patch of nebulosity lies about one degree east of the Iris nebula, NGC 7023 in the constellation of Cephus.

The sky conditions were not very good on the first evening with very high cirrus clouds, however on the second evening it was very clear. There was no moonlight only light pollution to contend with. Stars were visible down to about magnitude 4.5.

I was using my ten inch F/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband filters, a blue filter and an Atik 383L mono CCD camera.

I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image.

The total exposure time was three hours using a H Alpha filter, 30 minutes using an O111 filter and 35 minutes using a blue filter.



Tuesday, 12 November 2024

The Tulip nebula

Sh2 - 101, The Tulip nebula. This patch of nebulosity lies in the constellation of Cygnus the Swan at a distance of about 6,000 light years. There is believed to be a black hole to the west of it. The sky conditions were very poor  with high cirrus reflecting the moon light, stars were only visible down to about magnitude 3.5.

I was using my ten inch F4/8 reflector, a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband filters, S11, O111, HA, a blue filter and my Atik 383L mono CCD camera .

I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image . The total exposure time was 90 minutes using a H Alpha filter , 30 minutes using an O111 filter , 25 minutes using a S11 filter and ten minute using a blue filter.

RGB



BiColour



Hubble Palette


Saturday, 2 November 2024

NGC891

NGC891 resides in the constellation of Andromeda.

The observing conditions were suboptimal due to poor sky transparency; stars were only visible down to about magnitude 4.3. However, there was no moonlight to interfere, only the light pollution from the city. For imaging, I utilized an Atik 383L mono CCD camera, a ten-inch f/4.8 reflector, a Vixen Atlux mount, and a set of Astronomik RGB and narrowband filters with PHD autoguiding. I captured five-minute subframes and integrated them with corresponding dark frames and flat field frames to mitigate noise and vignetting effects in the final image.The cumulative exposure time was 120 minutes with an HA filter, 40 minutes with an OIII filter, and 20 minutes with a blue filter.



Monday, 28 October 2024

Images from the Exmoor National Park star party,

On October 25th and 26th, I participated in the Exmoor National Park star party, organized by the Yarn Market Hotel in Dunster, Somerset, and hosted by Terry Evans. I captured images of the Milky Way and Comet C/2023 A3, also known as Comet Tsuchinshan-Atas.

I used my Canon 10D with a Tamron 18mm-270mm zoom lens attached to my Astro Track mount. I took two-minute sub-frames along with matching dark frames, setting the camera to ISO 2300.