Celestron 80 manual Pointing at Polaris

Models: 80

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Pointing at Polaris

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.Adjust the mount in altitude until the latitude indicator points to your latitude. Moving the mount affects the angle the polar axis is pointing.

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.

Pointing at Polaris

This method utilizes Polaris as a guidepost to the celestial pole. Since Polaris is less than a degree from the celestial pole, you can simply point the polar axis of your telescope at Polaris. Although this is by no means perfect alignment, it does get you within one degree. Unlike the previous method, this must be done in the dark when Polaris is visible.

1.Set the telescope up so that the polar axis is pointing north. See Figure 11.

2.Loosen the DEC clutch knob and move the telescope so that the tube is parallel to the polar axis. When this is done, the declination setting circle will read +90°. If the declination setting circle is not aligned, move the telescope so that the tube is parallel to the polar axis.

3.Adjust the mount in altitude and/or azimuth until Polaris is in the field of view of the finder.

4.Center Polaris in the field of the telescope using the fine adjustment controls on the mount.

Declination

Lock

Latitude

Scale

Right

Ascension

Lock

Latitude Adjustment

Screws

Figure 10 – Equatorial Head

Remember, while Polar aligning, do NOT move the telescope in R.A. or DEC. You do not want to move the telescope itself, but the polar axis. The telescope is used simply to see where the polar axis is pointing.

Like the previous method, this gets you close to the pole but not directly on it. The following methods help improve your accuracy for more serious observations and photography.

Figure 11- Aligning the Equatorial mount to the polar axis of the Earth.

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Celestron 80 manual Pointing at Polaris