Horsehead

A half degree south of bright Alnitak (the east component of Orion's belt) there is the famous Horsehead nebula, made famous by the divulgation of the professional astrophotos and not by the beauty at the telescope. In fact, visually, it's a very difficult object, that need particular filters, big telescopes and very dark skys. Another nice nebula is Flame, at east of Alnitak.

See also:

Technical Data
Optics Pentax 75 apocromatic refractor, 75mm diameter
Focal Lenght 500 mm
Focal Ratio f/6,7
Exposure Time 35 min exposure
Film Kodak E200
Developement sensibility 320 ISO
Location Pian dell'Armà (PV, Italian Appennines), at 1400m
Date and time of exposure start 11 january 2002, 23.07 UT
Mount Meade 8"
Tracking ST4
Temperature and humidity T=-5°C, RH=90%
Notes -

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