My Astronomy


Click here for main

Home Page

Latest History of Astronomy Weekly 

Latest ANS Weekly


My New Book May 2018My previous e-book



My Telescopes

My Main Telescope - C14 and Paramount ME

My new Paramount MyT and 8-inch Ritchey-Chretien Telescope

MyT Hand Controller

My Meade 12 inch SCT on a CGEM (Classic) Mount

My 4 inch Meade Refractor with Sky Watcher Guidescope and ZWO camera on a CGEM (Classic) Mount

Skywatcher Star Adventurer Mount with Canon 40D


My Solar setup using a DSLR and Mylar Filter on my ETX90

DSLR attached to ETX90. LiveView image of 2015 partial eclipse on Canon 40D

Astronomy Blog Index
About the Site

 I try to log my observing and related activities in a regular blog - sometimes there will be a delay but I usually catch up. An index of all my blogs is on the main menu at the top of the page with daily, weekly or monthly views. My Twitter feed is below. I am also interested in photograping wildlife when I can and there is a menu option above to look at some of my images. I try to keep the news feeds from relevant astronomical sources up to date and you will need to scroll down to find these.

The Celestron 14 is mounted on a Paramount ME that I have been using for about 10 years now - you can see that it is mounted on a tripod so is a portable set up. I still manage to transport it on my own and set it all up even though I have just turned 70! It will run for hours centering galaxies in the 12 minute field even when tripod mounted.


My Recent Tweets
« Comet 62P Tsuchinshan | Main | Location of my new Observatory Site in Spain »

IC 4628 - The Prawn Nebula (Gum 56) in Scorpius 

I took the remote image on Saturday March 31st 2018 at 05h 44m 12s Australian Time from Siding Spring in New South Wales. It is a 300 second exposure using Telescope T13 which is a Takahashi Sky 90. The image has been rotated to put North towards the top. The position angle of the image taken was 177 degrees 44 minutes from North, i.e. the image below is 180 degrees  - 177 degrees 44 minutes = 2 degrees  16 minutes from North. If it is rotated clockwise by that amount it will be north at the top.

IC 4628 lies at a distance of 6000 Light Years. 


 The negative image below identifies some of the objects in the field. 

Three stars that appear orange in the colour image are identified on the negative image.

The angular size of the nebula can be determined.