Orion jupiter 5188 ユーザーズマニュアル

IN 438 Rev. A  12/11

© 2011 Orion Telescopes & Binoculars

Congratulations on your 
purchase of an 1.25" Orion 
Jupiter Observation Filter! 
Below we offer some quick 
tips on using and getting the 
most from your purchase.

Jupiter is a great target in any telescope! Jupiter is the third 
brightest object in the night sky, only the Moon and Venus 
(depending on its phase) are ever brighter. After the Sun 
and the Moon, Jupiter is the most detailed object to observe 
in the sky. (CAUTION: Observe the sun only with the proper 
solar filters; the Jupiter Observation Filter is NOT a solar 
filter by itself!!!)
Jupiter provides an interesting object to observe in any tele-
scope; but like all celestial objects, the bigger the telescope, 
the better the view you usually  have of detail on Jupiter. 
Binoculars can usually show you the four brightest moons of 
Jupiter, but with a big telescope, say 10 inches in diameter 
or larger, you can sometimes spot detail or shape on the 
moons of Jupiter during periods of truly excellent “seeing.” It 
usually takes a telescope of about 100 mm diameter to start 
seeing some of more subtle detail on Jupiter and at least an 
8-inch to really start pushing the limits of what the eye alone 
can see on Jupiter.
So grab your telescope and take a look at Jupiter, there are 
amazing sights to be seen nearly every night that Jupiter is 
visible, and the Orion Jupiter Observation Filter will help you 
make the most of your observing sessions.

Inside the shipping container you will find a foam-lined, 
plastic case. Inside will be the Orion Jupiter filter.

The Orion Jupiter Observation Filter has a metal cell, the 
end of the cell is threaded to accept the matching threads 
on the inside barrel of every Orion 1.25" eyepiece. The 
threads match most other eyepieces as well.
To install the Orion Jupiter Observation Filter, simply remove 
the filter from its case and thread the filter into the bottom 
of a 1.25"eyepieces (also called an “ocular”). Insert the eye-
piece into the telescope and focus on Jupiter.
Compared to viewing without the filter, you should notice an 
immediate increase in contrast of Jupiter’s main equatorial 
belts (there are two prominent belts, one on each side of 
Jupiter’s equator – they are the major features on Jupiter; 
they can fade or deepen in intensity with time) and Jupiter’s 
famous “Great Red Spot” should also be more pronounced 
with this filter! Note, since Jupiter rotates very rapidly (just 
under 10 hours!) some evenings the Great Red Spot is vis-
ible and sometimes it is not. With this filter you can more 
easily watch the Great Red Spot move across the face of 
Jupiter.

Keep the plastic case! Store the filter in the case between 
observing sessions in the case to keep it dust free. Dust is 
the enemy of contrast (the ability to discern detail) when you 
are trying to observe fine details on Jupiter.
Use an Orion cleaning kit (such as Orion part number 
5832) or clean compressed air to keep the surface of your