StarRings

PurposeTo determine a fairly accurate elevation i.e. altitude (vertical angle above the horizontal: full range, i.e. 0 degrees to 90 degrees) of a star or the Moon (or a landscape object), when it's not too windy, on land. DO NOT USE FOR THE SUN, for the Sun use the HangDial.
For a faster-to-use but less-accurate 3D print which does the same thing, see the StarSquare.
You can also use this to measure the angular distance between any two things (as long as that is less than 15 degrees, or 20 if using the 'universal' ring), e.g. the horizontal angular distance between two mountains, or the diagonal angular distance between two stars to ensure you have the right stars.


Model Files There are two set of model files, the standard set, and a set for people with shorter arms (or who want smaller prints)- this smaller set will be slightly less accurate. You can also scale these files. Each set contains 6 files, one for measuring altitudes 0 to 15 degrees, one for 15 to 30 degrees, one for