Building a small observatory
These are the steps that I am taking for my next project to build from a garden shed a small amateur astronomical observatory, the located near Manilva town, in an area known as the "Duquesa Hills".
It will be in an urban observatory opposite a golf course, with some light pollution limitations from nearby town and lights in the neighbourhood. The idea is to have a shelter that isolates me from some light pollution mainly from a nearby street lamps and two neighbours at each side of my house. For astrophotograhy, I will place a fixed base (pier) that will house the Takahashi CCA250 telescope. Having the observatory will allow me to spend more time imaging than if I had to setup each time without it in the garden.
I have the good fortune to live opposite a golf course, with the garden facing it (no nearby buildings from the North up to the South). My garden sky has a 360 degrees view at 60 degree altitude, just a tree nearby towards the East and with very few obstacles.
After much thinking and searching the net about the shed size, material and weight, I eventually decide to go a prefabricated shed, whereby the shelter's roof would be modified to slid open converting it to a roll-off roof.
2. The Shed
My original idea was to assemble and modify a prefabricated a wooded garden shed,Taking into account the available surface, and a certain degree of security I decided on a metal shed and in particular the MALMÖ by Wolder. The surface area cover is 5,29 m2 with a wall thickness of 0.25mm is light enough to modify it. It dimensions are 1.87 H x 2.57 W x 2.06 L, The shed reference is 16766050.
The structure will be modified mainly on the roof, the concept is to cut the roof length equal to the floor size,to be able for the roof to slid (open/close) I will build a railing at roof high which will be supported by a wood beam (shown here as a red vertical line).
3. Calculating the Distances
Having the real measures of the shed, a first approximation to the design is taking into consideration the height of the walls without the roof to be at least 1,60m, At this point I see light from the street lamp so a bit higher is ideal. I will build the Pier with the mount to be higher then the 1.6m, the angle of the telescope at position 3 parked will overcome the shed roof .
4. Delivery of the Shed
Delivery of the Shed
5. Building The Based
The first step is to construct the pier based, in my case I did a hole of 2 feet deep and 1 foot square. I used cement with stones to make the structure solid.
Secondly we constructed a wooden platform to place the Shed on top.
6. Building the Shed