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Observatory
Construction
 
Description
Observatory Construction (Clair Observatory, 2003/4)
Roof Changes (June 2005) 
Telescope
Gallery

Description

Clair Observatory is a wooden shed construction 6' 6" x 6' 6" , with a roll-off roof.  It is located in the back garden of our home which lies around 12 miles north of Aberdeen. The site has good sky access.  The minimum viewable altitude (around 20 deg) is limited by the observatory walls. The site suffers only minor local light pollution 

My LX200 telescope is mounted on a permanent 7" diameter metal pier, bolted to a concrete base.  The observatory has ample room for storing the LX200's case/tripod if necessary  and has sufficient room to take 1-2 visitors.  

The observatory has been built using the same shed and pier that were used for my previous observatory (Hilltop Observatory and Kingcup Observatory). The observatory was designed to be capable of moving, the only thing that doesn't move is the concrete pier base. !

Clair Observatory (roof open)

 

 Observatory Interior with equipment (larger view)

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Observatory Construction

The observatory uses the same sliding roof shed and telescope pier used for Hilltop Observatory (please refer to Design and Construction of Hilltop Observatory)

Key Dates : 

2004-02-05 : First Light
2004-01-24 : Observatory erected
2004-01-11 : Pier base constructed
2003-12-05 : Site cleared and levelled
2003-08-28 : Position for observatory within garden of new home chosen
2003-08-25 : Kingcup Observatory dismantled in preparation for moving. 

The following picture shows the observatory base and pier


Pier & observatory base (larger)

The reconstruction plan used  for re-erecting the observatory is listed below.

Procedure

Description

1

Shed Location

1.1

Decide optimal location for telescope (?observing trials)

1.2

Decide optimal orientation for shed / sliding roof supports

1.3

Decide cable routing options / decide voltage

2

Bolt Cage

2.1

Recover bolt cage / bolt cage holding batten from storage. (two bolt cages were made at time of Kingcup Observatory)

3

Site Preparation

3.1

Clear Site

3.2

Level Site / Insert Levelling Posts

4

Site Survey

4.1

Emplace Level Slab

4.2

Position Pier/Wedge/LX2000, align with Pole Star, Mark Base Holes

4.3

Align Holding Battens, Insert Alignment Posts

5

Pier Installation

5.1

Acquire Cement & Ballast 

5.2

Dig Hole

5.3

Mix Concrete / Emplace Bolt Cage

5.4

Emplace Bolt Cage in Cement

5.5

Leave to set / Cover

5.6

Level Top / cover

5.7

Bolt down Pier

6

Shed Base

6.1

Lay Sand& Ballast Base, Level Off

6.2

Lay Slabs

7

Shed Erection

7.1

Enroll helpers

7.2

Erect Shed / Put On Roof

7.3

Adjust Roof / Fittings

7.4

Re-Lay Flooring

8

Cabling

8.1

Fit conduit through Garage Wall

8.2

Run Power Cabling between Garage and Observatory

8.3

Tie In Cabling in Shed / Tie In Cabling in Garage

8.4

Test Cabling

9

Telescope Fitting

9.1

Cut Rubber Pad

9.2

Fix Wedge / LX200

9.3

Align Wedge/ Telescope

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Roof Changes (June 2005)

The roll-off roof was originally constructed with sets of wheels along each side of the roof. These ran along rails mounted on the top of each sidewall of the observatory and allowed the roof to be rolled-off/on.   Whilst the design originally worked well, there were increasing problems with it during 2004-2005, whereby some wheels would occasionally loosen and twist, causing the roof to jam when shutting (not the most desirable event when you're tired and cold).  

In June 2005 remedial work was carried out to relocate the wheels into positions on the top of each sidewall, thus allowing the roof to easily roll off/on, using the sides of the roof as rails.

 

Old Wheel/Rail Design 
   
  
New Wheel/Rail Design 
 

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Telescope

Pictures showing LX200 and associated equipment are shown below

LX200 Telescope  in Observatory
(Front & Side Views)
   

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Gallery

Moon above Clair Observatory 
(2005-01-25)

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This Web Page: Clair Observatory
Last Updated : 2006-01-07
Site Owner : David Richards
Home Page : David's Astronomy Web Site