The cache is not at the posted coordinates.
You will need to complete the Adventure Lab "Stargazing at Sromlo" to gather information for the final coordinates. The Adventure will take you for a walk around the Mount Stromlo site and should take you about 30 minutes to complete.
You will need a smart phone with WiFi access at each of the five locations to answer the AL questions. You must answer the questions while at the location (within 30 m of the Location). If you answer the question correctly you will be given access to a Journal Entry where you will find a clue for this mystery cache. When you have completed the five locations of the Adventure, you will have all the information you need to solve the puzzle for this cache.
S35 B(C+D).A(A+B)C E149 00.D(B+D)(D-B)
I hope you enjoy the locations and exploring Mount Stromlo and its telescopes.
1. Install the Adventure Lab Application
This cache requires that you download the Geocaching Adventure Lab application from your app store.
2. Go to the first AL waypoint to start the Adventure
You need to travel to the first waypoint (starting coordinates for this cache) to start the Adventure. Access the "Stargazing at Stromlo" Adventure. If you are at the first waypoint, it should be the first Adventure in the list displayed on the AL app. If you don't see the adventure, then scan the above QR Code for access.
One of the most exciting aspects of playing an AL is that you will get a lab cache find at each location. So if you complete this Adventure you will earn five lab cache finds. Then finding this cache will give you a bonus mystery find too.