Celestron Cpc 800 XLT User Manual

Focusing................................................................................................................................................................................................26
Calculating Magnification.....................................................................................................................................................................27
Determining Field of View ....................................................................................................................................................................27
General Observing Hints.......................................................................................................................................................................27
ASTRONOMY BASICS...............................................................................................................................................................................28
The Celestial Coordinate System...........................................................................................................................................................28
Motion of the Stars ................................................................................................................................................................................29
Polar Alignment (with optional Wedge) ................................................................................................................................................30
All-Star Polar Alignment.......................................................................................................................................................................30
All-Star Polar Alignment.......................................................................................................................................................................................... 30
Finding the North Celestial Pole...........................................................................................................................................................31
Declination Drift Method of Polar Alignment.......................................................................................................................................................... 32
CELESTIAL OBSERVING.........................................................................................................................................................................33
Observing the Moon ..............................................................................................................................................................................33
Lunar Observing Hints............................................................................................................................................................................................. 33
Observing the Planets............................................................................................................................................................................33
Planetary Observing Hints........................................................................................................................................................................................ 33
Observing the Sun..................................................................................................................................................................................34
Solar Observing Hints .............................................................................................................................................................................................. 34
Observing Deep Sky Objects .................................................................................................................................................................34
Seeing Conditions..................................................................................................................................................................................34
Transparency.........................................................................................................................................................................................34
Sky Illumination.....................................................................................................................................................................................34
Seeing ....................................................................................................................................................................................................34
CELESTIAL PHOTOGRAPHY .................................................................................................................................................................36
Short Exposure Prime Focus Photography ...........................................................................................................................................36
Eyepiece Projection...............................................................................................................................................................................37
Long Exposure Prime Focus Photography............................................................................................................................................38
Periodic Error Correction (PEC)..........................................................................................................................................................39
Using Periodic Error Correction............................................................................................................................................................................... 39
Terrestrial Photography........................................................................................................................................................................40
Metering................................................................................................................................................................................................................... 40
Reducing Vibration .................................................................................................................................................................................................. 40
F/6.3 with Reducer/Corrector................................................................................................................................................................................... 41
Auto Guiding............................................................................................................................................................................................................ 41
TELESCOPE MAINTENANCE .................................................................................................................................................................42
Care and Cleaning of the Optics ...........................................................................................................................................................42
Collimation............................................................................................................................................................................................42
OPTIONAL ACCESSORIES.....................................................................................................................................................................44
APPENDIX A - TECHNICAL SPECIFICATIONS ..................................................................................................................................46
APPENDIX B - GLOSSARY OF TERMS..................................................................................................................................................47
APPENDIX C – RS-232 CONNECTION (FOR COMPUTERIZED HAND CONTROL).....................................................................50
Communication Protocol:......................................................................................................................................................................................... 50
APPENDIX F – TIME ZONE MAP............................................................................................................................................................51
APPENDIX F – MAPS OF TIME ZONES.................................................................................................................................................51
SKY MAPS....................................................................................................................................................................................................53
OBSERVATIONAL DATA SHEET ...........................................................................................................................................................59

Celestron Cpc 800 XLT Specifications

General

Brand	Celestron
Model	Cpc 800 XLT
Category	Telescope
Language	English