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My Main Telescope - C14 and Paramount ME

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

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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

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 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.


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« Frank Acfield's Jupiter Part 2 from 1 year ago. | Main | Day 61 - Sky view from new site »

Frank Acfield's Jupiter from 1 year ago.

As Jupiter is still a bright object at the moment I thought I would look back to 1969 and Frank Acfield's lecture notes that I recorded on his course that year.


Lecture No. 9

I thought it would be interesting to compare the 1969 details for Jupiter from Frank with the more up to date details from his friend Patrick Moore in the Astronomy Data Book published in 2010.

The mean distance of Jupiter quoted in miles in 1969 is given in the Data Book as 778 340 000 km. This converts to 483638052miles so that is identical!

The Equatorial Diameter is given as 88,700 miles above and 142,884km  in the Data Book which is 88784miles - no change there either.!

 Identical values to the above in the Data Book

 The Data Book gives an orbital inclination of 1 degree 18 minutes and 15.8 seconds so a slight difference there but the axial inclination is the same.

The image below from SkyX confirms the opposition date given above - I had set the date to the same day in SkyX - clearly Jupiter is in opposition.

 To be continued..........