In the beginning...
TDS Observatory started with the purchase of San Diego State University’s surplus 24” telescope mount in the late ‘70s at the school’s surplus auction by astronomy majors, Sina Sadjadi and Jesse Goldbaum. Sina had convinced Jesse, whose interests were more in theory than observation, to split the cost of the mount by telling him that the resale value of the parts would be worth more than the sum -
Sina and Jesse were introduced to Mike Hoffert and Larry Dingle, who happened to possess a NASA surplus 25” mirror blank. When it was discovered that the SDAA was leasing observatory plots at $500 for a member’s lifetime, there was no choice but to build. Optics, tube assembly, a 400 sq. ft. building with roll off roof and a lot of manual labor with assistance from Mike Anderson and several other volunteers finally came to fruition a few years later. TDS Observatory would become the cornerstone for TAI.
Sina Sadjadi next to the TDS 24”
TDS 24” AIS -
TDS 24” AISCL -
TDS 24” USB Topology -
TDS Photo Gallery -
TDS 24” History -
TDS Observatory is located at SDAA’s TDS site about sixty miles east of San Diego. Please check their website for directions other related information. The site includes power and water (restrooms). The observatory is a roll-
The primary telescope in use at TDS Observatory is the 24” F8 Ritchey-
The primary imaging camera on the ‘open’ optical path is a liquid cooled, wide field 4K x 4K 9 PL16803 CCD camera that can reach about -
Click on the image to open a dynamic PDF of the TDS 24” Ritchey-