Chapter 13
Observations with the Meade LX-10
Telescope (Evening Observation)
During this observation period course, you will b e using a Meade LX-10 telescope to make
observations of celestial objects. You will be using what you have learned about the Meade
telescope and planisphere during the afternoon lab (Introduction to the Meade LX-10 Tele-
scopes]Introduction to the Meade LX-10 8
′′
Schmidt-Cassegrain Telescope).
13.1 Tonight’s Procedure
13.1.1 Getting started
When you arrive on the deck, t h e telescopes should be set up. Choose a telescope. You will
be working in groups of two or three. It may be somewhat crowded due to space constraints
so please be careful walking around and try n ot to hit other person’s equipment as they may
lose alignment.
First, remove the lens cap fr om the scope and store it where it will not be stepped on. Next,
find the RA and Dec cla m p s. When they are locked on, the telescope sh o u l d remain fixed.
Do not try and move (slew) the telescope by hand when the clamps are locked. You will
damage the gears. If they are unlocked, the telescope should easily move about both axes,
but sh ou l d stay relatively m ot i o n l ess if you stop it and let it go. The balance may not be
perfect.
13.1.2 Sighting Polaris
Start with the lowest power (longest focal length—26mm) eyepiece. Place it in the diagonal
prism and tighten snugly with the thumbscrew. Point the telescope at about 9 0 declination
and lock the RA clamp. Loosen the Manual Knob slightly and the Dec lock if necessary, and
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