Celestron NexStar HC Instruction Manual

41, 41 F - Focal length The distance between a lens (or mirror) and the point at which the image of an object at infinity is brought to focus. The focal length divided by the aperture of the mirror or lens is termed the focal ratio. J - Jovian Planets Any of th…

40, 40 A A p p p p e e n n d d i i x x B B - - G G l l o o s s s s a a r r y y o o f f T T e e r r m m s s A - Absolute magnitude The apparent magnitude that a star would have if it were observed from a standard distance of 10 parsecs, or 32.6 light-years. Th…

31, Celestron NexStar HC 31 Finding the North Celestial Pole In each hemisphere, there is a point in the sky around which all the other stars appear to rotate. These points are called the celestial poles and are named for the hemisphere in which they reside. For example, in the northern hemisphe…

26, 26 G G e e n n e e r r a a l l O O b b s s e e r r v v i i n n g g H H i i n n t t s s When working with any optical instrument, there are a few things to remember to ensure you get the best possible image. • Never look through window glass. Glass found in hous…

17, 17 with all accessories (eyepiece and Star Pointer) attached and lens cover removed as described in the Assembly section of the manual. 1. Once the NexStar is powered on , Press ENTER to begin alignment. 2. Use the Up and Down scroll keys to select AutoAlign if it is not alrea…

34, 34 Seeing Seeing conditions refers to the stability of the atmosphere and directly affects the amount of fine detail seen in extended objects. The air in our atmosphere acts as a lens which bends and distorts incoming light rays. The amount of bending depends on air densi…