Celestron 11007, Instruction Manual

Software Specifications 

Ports 

RS-232 communication port on hand control, Autoguider Port, 2 Auxiliary Port, PC Port

Period Error Correction 

Permanently programmable 

Tracking Rates 

Sidereal, Solar, Lunar 

Tracking Modes 

Alt-Az, EQ North and EQ South

Alignment Procedures 

Sky Align, Auto Two-Star Align, Two-Star Align, Solar System Align, EQ North Align  

and EQ South Align 

Database 

40,000+ objects, 99 user defined programmable objects. 

Enhanced information on over 200 objects

Complete Revised NGC Catalog  

7,840

Complete Messier Catalog 

110

Complete IC Catalog 

5,386

Complete Caldwell 

109

Abell Galaxies 

2,712

Solar System objects 

9

Famous Asterisms 

20

Selected CCD Imaging Objects 

25

Selected SAO Stars 

29,500

APPENDIX B - GLOSSARY OF TERMS

A –

Absolute  

The apparent magnitude that a star  

magnitude 

would have if it were observed from a  

standard distance of 10 parsecs, or 32.6 light– 

years . The absolute magnitude of the Sun is  

4.8. at a distance of 10 parsecs, it would just  

be visible on Earth on a clear moonless night  

away from surface light .

Airy disk  

The apparent size of a star’s disk produced even by 
a perfect optical system . Since the star can never 
be focused perfectly, 84 per cent of the light will 
concentrate into a single disk, and 16 per cent into a 
system of surrounding rings . 

Alt–Azimuth 

A telescope mounting using two 

Mounting 

independent rotation axes allowing  

movement of the instrument in Altitude  

and Azimuth . 

Altitude 

In astronomy, the altitude of a celestial object is 
its Angular Distance above or below the celestial 
horizon .

Aperture 

The diameter of a telescope’s primary lens or mirror; 
the larger the aperture, the greater the telescope’s 
light–gathering power.

Apparent 

A measure of the relative brightness of a  

Magnitude 

star or other celestial object as perceived  

by an observer on Earth .

Arc minute 

A unit of angular size equal to 1/60 of  
a degree .

Arc second 

A unit of angular size equal to 1/3,600 of a degree (or 
1/60 of an arc minute).

Asterism 

A small unofficial grouping of stars in the  
night sky .

Asteroid 

A small, rocky body that orbits a star .

Astrology 

The pseudoscientific belief that the positions of stars 

and planets exert an influence on human affairs; 
astrology has nothing in common with astronomy .

Astronomical  

The distance between the Earth and the Sun . 

unit (AU)  

It is equal to 149,597,900 km., usually  

rounded off to 150,000,000 km. 

Aurora 

The emission of light when charged particles from 
the solar wind slams into and excites atoms and 
molecules in a planet’s  
upper atmosphere .

Azimuth 

The angular distance of an object eastwards along 
the horizon, measured from due north, between 
the astronomical meridian (the vertical line passing 
through the center of the sky and the north and 
south points on the horizon) and the vertical line 
containing the celestial body whose position is to  
be measured . 

B –

Binary Stars 

Binary (Double) stars are pairs of stars that, because 
of their mutual gravitational attraction, orbit around 
a common center of mass. If a group of three or 
more stars revolve around one another, it is called 
a multiple system. It is believed that approximately 
50 percent of all stars belong to binary or multiple 
systems . Systems with individual components that 
can be seen separately by a telescope are called 
visual binaries or visual multiples . The nearest “star” 
to our solar system, Alpha Centauri, is actually our 
nearest example of a multiple star system. It consists 
of three stars, two very similar to our Sun and one 
dim, small, red star orbiting around one another . 

C –

Celestial  

The projection of the Earth’s equator  

Equator 

on to the celestial sphere. It divides the sky  

into two equal hemispheres . 

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