This cache is part of a 2 stage series of caches that make up a star constellation called Orion. The first part consists of 10 caches of various types, as does this second part. (20 caches all up) There are two “final” caches, one for each series, which will require you to find a number of other caches in the series to complete the whole constellation. Most caches will be quite easy to find, no tricky hides – just something to have some fun out there :-)
This Cache
This cache is a bit of a puzzle... If you have worked your way through the other caches, you will have noticed that many stars in the constellation are named simply by Greek letters. This is very common amongst the stars, as there are too many to give them all proper names and because over the years many people in many different cultures have done so and hence created a rather confusing multitude of names for some stars.
Some of the stars you may know have names like Sirius or Vega and Orion is probably the constellation with the most "named" stars, so you would by now know Betelgeuze, Bellatrix, Rigel and Meissa, but in most constellations stars simply have Greek letters to identify them. This came about in 1603, when the German astronomer Johann Bayer came up with a cataloguing system in which each constellation has its stars named from brightest to dimmest (or sometimes top to bottom or West to East) using the Greek alphabet plus the name of the constellation. Orion seems to be the odd one out here, as Betelgeuze is called α orionis, even though Rigel is the brightest star, Rigel is called β orionis, even though the brightest and bottom right star, hence it should have been α or virtually at the end of the naming line, as it is at the bottom right corner of the constellation... The other stars are named all over the show as well - right to left, bottom to top and so on.
Some stars that appear in a line or a "string" in the constellation, have been given the same Greek letter plus a superscript number, hence the series of π1 to π6 in Orion's shield.
So to keep up with all the Greek lettering it is time to learn the Greek alphabet and call η "eta", instead of "n" and ν "nu" instead of "v"....
To find this cache, you will simply need to find the letter values for the following Greek letters - couldn't be easier!
Ok, there seems to be a bit of confusion what "letter values" means - we are not after numerals, just simply after the number the letter takes in the alphabet, hence a = 1, b = 2, c = 3 etc, only in Greek ;-)
The cache is hidden at S 34°εη.θαδ E 117°εζ.θγι
GZ is a couple of metres off the track in the obvious spot. No need for bush bashing.
Hope you enjoy this little puzzle! 
Background information on Orion
The star constellation we are putting on the Albany map is called Orion and has its first mention (that we know of) in the Old Testament of the Bible. It appears in many myths around the world and as with many other stars and constellations, many a seafarer would have known and used these stars for navigational purposes before GPSs were invented. In the southern hemisphere Orion is most visible in the evening from November to March rising in the east and setting in the north-western sky. Whilst when in the northern hemisphere the hunter stands firmly on his feet, here in the south he is seen to do a "head stand", so if you are looking for him in the night sky, be aware of his acrobatics ;-)
The constellation consists of 7 major stars (8 named stars) and numerous minor stars and nebulae. For the purpose of this series I have used 20 stars / nebulae out of the constellation. The stars in the first series can all be spotted quite easily with the naked eye on a clear night (particularly in Albany, with little light pollution) while the stars in the second series are harder to spot, as most of them appear much fainter in the sky. If you are interested in more info on the various stars, navigation, history and mythology check out any of the first 10 Orion caches, which have links on them to some interesting sites.
History of the cache series
Pictionary, Astronomy and Geocaching – how it all worked together.
Well, you may wonder, how do you get from Astronomy and Geocaching to Pictionary? It went like this: We had put out three caches in aid of TangowithCupcake's ABCD Challenge and when they appeared on the Geocaching map as pretty little stars (our caches) my Pictionary instinct kicked in and I knew: this was Orion's belt! It took a couple of years and some work to put it all together, but here it is; hope you enjoy!
Having a (seafarer) dad who taught me about stars from an early age, I am dedicating this series to him – Thanks Dad for all you taught us :-)