Table of Contents

INTRODUCTION

4

Warning

4

ASSEMBLY

8

Setting up the Tripod

8

Attaching the Equatorial Mount

9

Attaching the Center Leg Brace

10

Installing the Counterweight Bar

10

Installing the Counterweights

11

Attaching the Slow Motion Control Knobs (Cables)

11

Attaching the Telescope Tube to the Mount

12

Installing the Finderscope

13

Installing the Visual Back

13

Installing the Star Diagonal

14

Installing the Eyepieces

14

Moving the Telescope Manually

15

Balancing the Mount in R.A

15

Balancing the Mount in DEC

16

Adjusting the Mount

16

Adjusting the Mount in Altitude

17

Adjusting the Mount in Azimuth

17

TELESCOPE BASICS

18

Image Orientation

20

Focusing

20

Aligning the Finderscope

21

Calculating Magnification

21

Determining Field of View

22

General Observing Hints

22

ASTRONOMY BASICS

23

The Celestial Coordinate System

23

Motion of the Stars

24

Latitude Scale

25

Pointing at Polaris

25

Finding the North Celestial Pole

26

Polar Alignment in the Southern Hemisphere

27

Pointing at Sigma Octantis

28

Finding the South Celestial Pole (SCP)

28

Declination Drift Method of Polar Alignment

29

Aligning the R.A. Setting Circle

30

Using the R.A. Vernier Scale

31

CELESTIAL OBSERVING

32

Observing the Moon

32

Lunar Observing Hints

32

Observing the Planets

32

Observing the Sun

33

Solar Observing Hints

33

Observing Deep Sky Objects

33

Seeing Conditions

33

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Celestron OMNI XLT 102 manual Table of Contents