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Celestron Ambassador Series Manual

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The Ambassador telescopes were designed mainly for terrestrial observing. However, if you have an interest
in looking up in the sky, you can observe the Moon and planets quite easily. If you have an interest
especially with the 80mm model) to locate some deep sky objects (galaxies, nebulae, or clusters), you will
have to find them by “star hopping”. Star hopping is a technique that assists in locating deep sky objects and
you can find out how to do it by searching the web for information.
A limitation of astronomical observing is that the Ambassador telescopes have a limited range of sky you can
observe in (objects cannot be observed closer than about 30° from the zenith with the 50mm model and about
45° with the 80mm model). This limitation is due to the vintage mechanical design of the altazimuth mount.
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Often, it is tempting to look at the Moon when it is full. At this
time, the face we see is fully illuminated and its light can be
overpowering. In addition, little or no contrast can be seen during
this phase.
One of the best times to observe the Moon is during its partial
phases (around the time of first or third quarter). Long shadows
reveal a great amount of detail on the lunar surface. At low power
you will be able to see most of the lunar disk at one time. Change
to optional eyepieces for higher power (magnification) with the
80mm model to focus in on a smaller area.
Lunar Observing Hints
To increase contrast and bring out detail on the lunar surface, use optional filters. A yellow filter works well at
improving contrast while a neutral density or polarizing filter will reduce overall surface brightness and glare.
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Other fascinating targets include the five naked eye planets. You can
see Venus go through its lunar-like phases. Mars can reveal a host of
surface detail and one, if not both, of its polar caps. You will be able to
see the cloud belts of Jupiter and the great Red Spot (if it is visible at
the time you are observing). In addition, you will also be able to see the
moons of Jupiter as they orbit the giant planet. Saturn, with its beautiful
rings, is easily visible at moderate power
.
Planetary Observing Hints
• Remember that atmospheric conditions are usually the limiting factor on how much planetary detail
will be visible. So, avoid observing the planets when they are low on the horizon or when they are
directly over a source of radiating heat, such as a rooftop or chimney.
• To increase contrast and bring out detail on the planetary surface, try using optional Celestron
eyepiece filters.
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