#1  
Old 18-03-2012, 11:32 AM
Mekon's Avatar
Mekon (Paul)
Registered User

Mekon is offline
 
Join Date: Oct 2009
Location: Brisbane Australia
Posts: 35
Height of the dome.

Hello All,

Tomorrow I will sign a contract on a new house, while it isn't in a dark sky area, it is a lot darker than where I am now.
To take advantage of this, I plan on building a permanent observatory, using a dome from Sirius or Astrodomes.

As it will be probably three meters from the ground to the base of the dome I will need to get it designed properly with an engineer's or architect's design. The question I am unable to answer is - "How high to put the floor in relation to the base of the dome?" Or to put it a different way, "Should the base of the dome be at my waist height, chest height or something else?" My instinct is to put the base of the dome at the same height as the mount, but I am new at this and don't want to make such a basic error.

Thanks for any help,

Mekon
Reply With Quote
  #2  
Old 18-03-2012, 03:10 PM
bojan's Avatar
bojan
amateur

bojan is online now
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,304
Centre of the dome should be at the height where the declination shaft is when in horizontal position.
Attached Files
File Type: pdf Sirius_dome Layout1 (1).pdf (5.3 KB, 72 views)
Reply With Quote
  #3  
Old 18-03-2012, 07:42 PM
ChrisM's Avatar
ChrisM
Sandy Ridge Observatory

ChrisM is offline
 
Join Date: Mar 2008
Location: Gippsland, VIC
Posts: 730
Paul,

My dome is also 3 metres off the ground, and I put the floor about 750 mm below the bottom of the dome. Other factors that come into the equation could include what type of scope you will have, height of pier, type of mount, and whether you will be doing visual observing or AP.

When my scope is parked horizontally, the dec axis is just a little higher than the lowest part of the dome aperture opening. This means that if I want to look at something on the horizon, I can't see it with the full telescope aperture, but that is not a problem. Anything worthwhile seeing will be at least 30 degrees above the horizion.

You can see a picture of my observing floor in post #12 here:
http://www.iceinspace.com.au/forum/s...t=36222&page=3

Of course, having the walls 3 m high then allows enough space for a room downstairs.....

Chris
Reply With Quote
  #4  
Old 19-03-2012, 06:46 AM
Barrykgerdes
Registered User

Barrykgerdes is offline
 
Join Date: Feb 2007
Location: Beaumont Hills NSW
Posts: 2,900
Hi Paul

I built an observatory using a Sirius 2.4 metre dome 12 years ago using colour bond, timber and the dome.

Unless you need to see the horizon it is not necessary to have the telescope go below 25 degrees. This makes it much easier to handle however placing a 12" SCT on a wedge 2 metres above the ground will present some challenges.

I will attach a zip file of my observatory where you can look at a scaled arrangement of the components.
Attached Files
File Type: zip Obsevatory.zip (445.1 KB, 41 views)
Reply With Quote
Reply

Bookmarks

Tags
dome, pier

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:04 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
NexDome Observatories
Advertisement
Bintel
Advertisement
Limpet Controller
Advertisement
Astronomy and Electronics Centre
Advertisement