Celestron CR-150 HD - Manual (Page 40)

40 • Celestial Observing
Star hopping may take some getting used to since you can see more stars through
the finder than you can see with the naked eye. And, some objects are not visible
in the finder. One such object is M57, the famed Ring Nebula. Here’s how to find
it:
1. Find the constellation of Lyra, a small parallelogram visible in the summer and fall
months. Lyra is easy to pick out because it contains the bright star Vega.
2. Start at the star Vega — Alpha ( α ) Lyrae — and move a few degrees southeast to
find the parallelogram. The four stars that make up this geometric shape are all
similar in brightness, making them easy to see.
3. Locate the two southern most stars that make up the parallelogram —
Beta ( β ) and Gamma ( γ ) Lyrae (see figure 6-3).
4. Point the finder half way between these two stars.
5. Move about 1/2° toward Beta ( β ) Lyrae, but remaining on a line that
connects the two stars.
6. Look through the telescope and the Ring Nebula should be in the tele-
scope. Its angular size is quite small and, therefore, not visible in the
finder.
These two examples should give you an idea of how to star hop to deep-sky
objects. To use this method on other objects, consult any of the star atlases listed at
the end of this book.
Figure 6-3 Figure 6-3 Figure 6-3 Figure 6-3 Figure 6-3
Although the Ring Nebula lies Although the Ring Nebula lies Although the Ring Nebula lies Although the Ring Nebula lies Although the Ring Nebula lies
between two naked eye stars,
between two naked eye stars, between two naked eye stars, between two naked eye stars, between two naked eye stars,
it may take a little time to
it may take a little time to it may take a little time to it may take a little time to it may take a little time to
locate since it is not visible in
locate since it is not visible in locate since it is not visible in locate since it is not visible in locate since it is not visible in
the finder. Note that the scale
the finder. Note that the scale the finder. Note that the scale the finder. Note that the scale the finder. Note that the scale
for this star chart is different
for this star chart is different for this star chart is different for this star chart is different for this star chart is different
from the one on the previous
from the one on the previous from the one on the previous from the one on the previous from the one on the previous
page which shows several
page which shows several page which shows several page which shows several page which shows several
constellations including
constellations including constellations including constellations including constellations including
Pegasus, Triangulum, and
Pegasus, Triangulum, and Pegasus, Triangulum, and Pegasus, Triangulum, and Pegasus, Triangulum, and
Andromeda.
Andromeda. Andromeda. Andromeda. Andromeda.