California
.
This nebula is called California for his resemling the american region. It's located in Perseus, very near the Xi Per star (at the center).
Technical Data
Optics Pentax 75 apocromatic refractor, 75mm diameter
Focal Lenght 500 mm
Focal Ratio f/6,7
Exposure Time 45 min exposure
Film Kodak E200
Developement sensibility 320 ISO
Location Pian dell'Armà (PV, Italian Appennines), at 1400m
Date and time of exposure start 12 january 2002, 20.24 UT
Mount Meade 8"
Tracking ST4
Temperature and humidity T=-3°C, RH=33%
Notes -
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