Orion SKYQUEST XX14I - Manual (Page 28)

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The Object Locator’s database includes:
• 7,840 objects from the Revised New General Catalog
(NGC)
• 5,386 objects from the Index Catalog (IC)
• 110 objects from the Messier Catalog (M)
• 837 selected stars (mostly double, multiple, and variable
stars)
• 8 planets
• 99 user-programmable objects
With the user-friendly IntelliScope Object Locator, there are
many ways to locate an astronomical object. If you know its
catalog number (NGC or M number, for instance), you can
enter it using the illuminated keypad buttons. Or you can
press one of the object category buttons (Cluster, Nebula,
Galaxy, etc.) to access a list of objects by type. For a tour of
the best objects visible in a given month, you just press the
Tour button.
Another great feature of the IntelliScope is the ability to iden-
tify an “unknown” object in the field of view – just press the
ID button. You can even add up to 99 objects of your own
choosing to the Object Locator’s database. The backlit, two-
line LCD on the Object Locator shows you the object’s cata-
log number, its common name if it has one, the constellation
in which it resides, its right ascension and declination coordi-
nates, the object type, magnitude, angular size, as well as a
brief description in scrolling text.
The IntelliScope Object Locator is a wonderful convenience
for both the novice and experienced observer. You’ll spend
more time actually observing astronomical objects instead
of hunting for them. For instructions on how to operate the
Object Locator, refer to the instruction manual included in the
box with the IntelliScope Object Locator kit.
Selecting an Observing Site
Since most astronomical objects are faint, observing them
from dark skies will give you the best views. While some
objects, such as the planets and Moon, are bright enough
to see clearly even from light-polluted city skies, for nebulas,
galaxies, and most star clusters, the less ambient light there
is to reduce contrast, the better.
When it isn’t possible or convenient to get out of town to a
pitch-black observing location, try to set up in a spot that is
removed from street and building lights and that has a clear
view of a large portion of the sky. Avoid pointing the tele-
scope above buildings, if possible, since they radiate heat
which degrades images. For observing faint deep sky objects,
choose a moonless night or time of night. Using the optional
light shroud will be a necessity (see below). Also, use of a
light-pollution filter, like the Orion SkyGlow Broadband fil-
ter, can mitigate the effects of background sky brightness,
enhancing the view of faint objects.
Use of the Optional Light Shroud
When viewing from light-polluted skies, we highly recommend
using the optional light shroud for the XX14i. The light shroud
is a black nylon cloth wrap that fits over the exterior of the
truss poles
(Figure 48). The shroud prevents stray light from
entering the telescope through the open truss section of the
tube and degrading image contrast. The shroud also helps
prevent dew from forming on the optical surfaces of the tele-
scope.
Seeing and Transparency
Atmospheric conditions play a huge part in quality of viewing.
Light from stars and other celestial objects must travel through
miles of Earth’s atmosphere to reach our eyes. The air in the
atmosphere will refract and bend the light. Atmospheric turbu-
lence will worsen the effects of refraction, which can cause the
image you see in your telescope to be unstable. The steadi-
ness of the atmosphere is called the “seeing” condition.
In conditions of good seeing, star twinkling is minimal and
objects appear steady in the eyepiece. Seeing is best over-
head, worst at the horizon. Also, seeing conditions generally
get better later in the evening, as much of the heat absorbed
by the Earth during the day has radiated off into space. In
Figure 48. The optional light shroud for the XX14i prevents stray
light from entering the telescope. It also helps prevent dew from
forming on the optical surfaces.