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LIMITING MAGNITUDE
To determine the limiting magnitude of a telescope, use the aperture in the
following formula for an approximation.
Limiting Magnitude = 7.5 + 5LOG(Aperture in cm)
Ex: Limiting Magnitude of a 60x600mm telescope.
Limiting Magnitude = 7.5 + 5LOG(6cm)
Limiting Magnitude = 7.5 + (5 x 0.78)
Limiting Magnitude = 11.39
RESOLVING POWER
To determine the resolving power of a telescope under ideal conditions,
divide the aperture into 4.56.
Resolving Power = 4.56/Aperture (in inches)
Ex: Resolving Power of a 60x600mm telescope.
Aperture (in.) = 60mm/25.4 = 2.36 in.
Resolving Power = 4.56/2.36in.
Resolving Power = 1.93
ASTRONOMY FORMULAE FOR YOUR
ZHUMELL ZENITH TELESCOPE
