580484

Celestron AstroMaster 130 EQ Manual

17
Zoom out
Zoom in
Previous page
1/32
Next page
17
P
P
o
o
l
l
a
a
r
r
A
A
l
l
i
i
g
g
n
n
m
m
e
e
n
n
t
t
w
w
i
i
t
t
h
h
L
L
a
a
t
t
i
i
t
t
u
u
d
d
e
e
S
S
c
c
a
a
l
l
e
e
The easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the celestial
pole by identifying certain stars near it, this method works off of a known constant to determine how high the polar axis should
be pointed. The AstroMaster CG-3 mount can be adjusted from about 20 to 60 degrees (see figure 4-3).
The constant, mentioned above, is a relationship between your latitude and the angular distance the celestial pole is above the
northern (or southern) horizon. The angular distance from the northern horizon to the north celestial pole is always equal to
your latitude. To illustrate this, imagine that you are standing on the north pole, latitude +90°. The north celestial pole, which
has a declination of +90°, would be directly overhead (i.e., 90 above the horizon). Now, let’s say that you move one degree
south — your latitude is now +89° and the celestial pole is no longer directly overhead. It has moved one degree closer toward
the northern horizon. This means the pole is now 89° above the northern horizon. If you move one degree further south, the
same thing happens again. You would have to travel 70 miles north or south to change your latitude by one degree. As you can
see from this example, the distance from the northern horizon to the celestial pole is always equal to your latitude.
If you are observing from Los Angeles, which has a latitude of 34°, then the celestial pole is 34° above the northern horizon.
All a latitude scale does then is to point the polar axis of the telescope at the right elevation above the northern (or southern)
horizon. To align your telescope:
1. Make sure the polar axis of the mount is pointing due north. Use a landmark that you know faces north.
2. Level the tripod. Leveling the tripod is only necessary if using this method of polar alignment.
3. Adjust the mount in altitude until the latitude indicator points to your latitude. Moving the mount affects the angle the polar
axis is pointing. For specific information on adjusting the equatorial mount, please see the section “Adjusting the Mount.”
This method can be done in daylight, thus eliminating the need to fumble around in the dark. Although this method does NOT
put you directly on the pole, it will limit the number of corrections you will make when tracking an object.
Figure 4-3
Figure 4-2
All stars appear to rotate around the celestial poles. However, the appearance of this
motion varies depending on where you are looking in the sky. Near the north celestial
pole the stars scribe out recognizable circles centered on the pole (1). Stars near the
celestial equator also follow circular paths around the pole. But, the complete path is
interrupted by the horizon. These appear to rise in the east and set in the west (2).
Looking toward the opposite pole, stars curve or arc in the opposite direction scribing a
circle around the opposite pole (3).
… 17 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Celestron AstroMaster 130 EQ at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Celestron AstroMaster 130 EQ in the language / languages: English as an attachment in your email.

The manual is 10 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Celestron AstroMaster 130 EQ

Celestron AstroMaster 130 EQ User Manual - German - 32 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info