Micro-Observatory Project #1

August 18, 2019 - Reading time: 3 minutes

My goal with my “micro-observatory” project is to be able to set up a self-powered astrophotography system that can remain in place through any weather while protecting the equipment, be operational and ready to image within a couple minutes, and be moveable--if necessary. I don’t need it to be fully automated for now. This is a fairly complicated setup, and so I’m going to take this in steps. The main missing piece of automation is raising and lowering the lid. Of course, all the astro gear is automated, except for a motorized cap, which won’t be necessary without the ability to remotely open and close the lid.

I started testing this idea a couple years ago with wood frames, and even did some research on wood shipping crates. I settled on this plastic molded shipping container with 27”/68.5cm interior dimensions--it’s a cube. So far, this looks like it might work. The stock hardware is crap--I already drilled off the hinges, and I’m looking at 180 degree hinge mechanisms and other options for lifting the lid away with minimal obstruction of the sky (https://youtu.be/6bMMZq0X29E). Whatever I end up with will have to be pretty sturdy because I’ll be mounting a 50 watt solar panel on the lid to keep the batteries charged. 

As far as project progress, I’m still at the beginning. I’m testing out different mount/scope configurations for fit--with the scope and counterweights horizontal. I was surprised to find the Orion Atlas EQ-G fit with a small refractor--just barely, and only with west-side travel and no meridian flips. (I had to move the mount and aluminum mounting frame all the way to one side to make this configuration fit). Today I’m trying out the iOptron CEM25P, with the hope that this will fit entirely in the box, centered, and be able to do flips and reach most of the sky.

I’m going to spend a while doing weather and motion testing, anchoring to the ground and monitoring temperature and humidity. It’s water-tight, so I’m not worried about leaks. I just don’t want internal temps or condensation to build up this time of year, or in the winter, to drop below the equipment specs. I haven’t decided what I’ll do for warmth when it’s cold outside. It’s not unusual for the temperature to remain well below freezing for extended periods of time (-6F / -20C is not unusual).

Much to do. I’ll keep you posted!