Sunday 28 August 2016

Managed to get some imaging time in last night 27 August 2016.

Target for the night was NGC 253 also known as the Sculptor galaxy.


From Wikipedia:
As one of the brightest galaxies in the sky, the Sculptor Galaxy can be seen through binoculars and is near the star Beta Ceti. It is considered one of the most easily viewed galaxies in the sky after the Andromeda Galaxy.
The Sculptor Galaxy is a good target for observation with a telescope with a 300 mm diameter or larger In such telescopes, it appears as a galaxy with a long, oval bulge and a mottled disc. Although the bulge appears only slightly brighter than the rest of the galaxy, it is fairly extended compared to the disk. In 400 mm scopes and larger, a dark dust lane northwest of the nucleus is visible, and over a dozen faint stars can be seen superimposed on the bulge
I took 400 X 30 second frames on this target.
I then discarded a BUNCH of them and ended up putting 282 into DSS.
DSS then decided to chuck out a few more and it stacked 225.

Short exposure AP.
Light frames 225X30 second exposures.
Dark frames 20
Light frames 10
ISO 800
Skywatcher 102 ALT/AZ mount.
Canon 1200D.(Unmodded)

It is getting considerably warmer here and APT was showing a sensor temp of 33deg to start with and dropping to 30 by the end of the session, this was imaged form 21H30 through midnight.
Fairly high for a DSLR so noise was a major problem in the image, I still have plenty of noise in it as I struggled to reduce it while still keeping a reasonable galaxy.

Here is the result along with a annotated version from Astrometry.net





Wednesday 24 August 2016

August 23rd 2016.

Venus, Jupiter and Mercury.

Took this image of the three planets that are now forming a nice triangle in the night skies just after dusk in the west.
It was also my first view of Mercury.
I have now seen Mercury, Venus, Earth, Mars, Jupiter, Saturn and Neptune either through the scope or naked eye.
One, or two left depending on how you feel about the status of Pluto.

Here are the details of this capture.

ISO 100
Single 5 second exposure
Canon 1200D on a fixed tripod.

The image was captured from a open field overlooking the western horizon.
The houses in the foreground are in Yellowood park with Chatsworth and Queensburgh in the background.


Wednesday 17 August 2016

Friday 12th August 2016.

I was out gathering some photons for my Messier photo project and had completed the intended targets and turned my attentions elsewhere.

Enter the Grus quartet.
This is a collection of four galaxies, NGC 7599, NGC 7590, NGC 7582 and NGC 7552. From bottom to top in the image.
This quartet is located in the constellation Grus.

These are interacting galaxies due to their close proximity to each other.
They lie approximately 55-70 million light years away!

I captured this image with the Skywatcher 102 scope and Canon 1200D.
The details are thus:

40 X 30 second exposures
Also flats, dark and bias frames were used.
ISO 800
Due to the low number of light frames there is substantial noise in the image.

When the weather permits I would like to do a recapture with plenty more light frames.
All stacked in DSS and post processing done with Star tools.