Meade LX70 R5 5 inch Instruction Manual - Page 20

APPENDIX B, Setting Circles

Get Meade LX70 R5 5 inch PDF manuals and user guides View all Meade LX70 R5 5 inch manuals
Add to My Manuals
Save this manual to your list of manuals

Page 20 highlights

APPENDIX B: Setting Circles the objects DEC coordinate is aligned with the 0 registration mark. If the procedure has been followed carefully, the bright star should now be in the center of the telescope eyepiece and setting circles showing the bright star coordinates. To use the setting circles to locate an object not To locate another object, unlock the RA and easily found by direct visual observation: DEC locks and move the telescope so the RA Insert a low-power eyepiece, such as a 26mm, and DEC setting circle coordinates match the into the focuser assembly. Pick out a bright star target object. Then lock each axis and use the with which you are familiar (or is easily located) slow motion controls to track the object. that is in the area of the sky in which your target object is located. Look up the R.A. coordinate of If when using the setting circles to locate ob- the bright star, and also of the object you wish jects, you do not immediately see the object to locate, in a star atlas or on the internet. Point you are seeking, try searching the adjacent sky the telescope at the bright star. Then loosen the area. Start with the 26mm eyepiece when locat- R.A. setting circle lock knob (see Fig. 42) and ing object since it has a wider field of view than turn the R.A. setting circle to read the correct the 9mm. Because of its much wider field, the R.A. coordinate of the bright star; lock the R.A. viewfinder may be of significant assistance in setting circle lock knob to secure the setting locating and centering objects, after the setting circle in place (If you are in the northern hemi- circles have been used to locate the approxi- sphere, use the top numbers on the RA setting mate position of the object. circle. If you are in the southern hemisphere use the bottom numbers.). Next, adjust the DEC set- ting circle by moving the setting circle ring until RA Setting Circle Lock Knob RA Setting Circle DEC Setting Circle Figure 42: RA setting circle and lock knob Figure 43: DEC setting circle 20

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
20
20
APPENDIX B:
Setting Circles
To use the setting circles to locate an object not
easily found by direct visual observation:
Insert a low-power eyepiece, such as a 26mm,
into the focuser assembly. Pick out a bright star
with which you are familiar (or is easily located)
that is in the area of the sky in which your target
object is located. Look up the R.A. coordinate of
the bright star, and also of the object you wish
to locate, in a star atlas or on the internet. Point
the telescope at the bright star. Then loosen the
R.A. setting circle lock knob (see Fig. 42) and
turn the R.A. setting circle to read the correct
R.A. coordinate of the bright star; lock the R.A.
setting circle lock knob to secure the setting
circle in place (If you are in the northern hemi-
sphere, use the top numbers on the RA setting
circle. If you are in the southern hemisphere use
the bottom numbers.). Next, adjust the DEC set-
ting circle by moving the setting circle ring until
the objects DEC coordinate is aligned with the 0
registration mark. If the procedure has been fol-
lowed carefully, the bright star should now be in
the center of the telescope eyepiece and setting
circles showing the bright star coordinates.
To locate another object, unlock the RA and
DEC locks and move the telescope so the RA
and DEC setting circle coordinates match the
target object. Then lock each axis and use the
slow motion controls to track the object.
If when using the setting circles to locate ob-
jects, you do not immediately see the object
you are seeking, try searching the adjacent sky
area. Start with the 26mm eyepiece when locat-
ing object since it has a wider field of view than
the 9mm. Because of its much wider field, the
viewfinder may be of significant assistance in
locating and centering objects, after the setting
circles have been used to locate the approxi-
mate position of the object.
Figure 43:
DEC setting circle
Figure 42:
RA setting circle and lock knob
RA Setting Circle
RA Setting Circle
Lock Knob
Lock Knob
DEC Setting Circle
DEC Setting Circle
RA Setting Circle
RA Setting Circle