Celestron NexStar GPS Instruction Manual page 3

The Celestial Coordinate System .................................................................................................................................................. 28
Motion of the Stars ....................................................................................................................................................................... 29
Polar Alignment (with optional Wedge) ....................................................................................................................................... 30
Calibrating Level...................................................................................................................................................................... 30
EQ Alignment Procedure ......................................................................................................................................................... 30
Finding the North Celestial Pole .................................................................................................................................................. 31
Latitude Scale Polar Alignment Method .................................................................................................................................. 32
Pointing at Polaris Method of Polar Alignment........................................................................................................................ 32
Declination Drift Method of Polar Alignment.......................................................................................................................... 33
CELESTIAL OBSERVING ............................................................................................................................................................... 34
Observing the Moon ..................................................................................................................................................................... 34
Lunar Observing Hints ............................................................................................................................................................. 34
Observing the Planets................................................................................................................................................................... 34
Planetary Observing Hints........................................................................................................................................................ 34
Observing the Sun......................................................................................................................................................................... 35
Solar Observing Hints .............................................................................................................................................................. 35
Observing Deep Sky Objects......................................................................................................................................................... 35
Seeing Conditions......................................................................................................................................................................... 35
Transparency................................................................................................................................................................................ 35
Sky Illumination............................................................................................................................................................................ 35
Seeing ........................................................................................................................................................................................... 36
CELESTIAL PHOTOGRAPHY........................................................................................................................................................ 37
Short Exposure Prime Focus Photography................................................................................................................................... 37
Eyepiece Projection...................................................................................................................................................................... 38
Long Exposure Prime Focus Photography ................................................................................................................................... 39
Periodic Error Correction (PEC)................................................................................................................................................. 40
Using Periodic Error Correction............................................................................................................................................... 40
Terrestrial Photography ............................................................................................................................................................... 41
Metering................................................................................................................................................................................... 42
Reducing Vibration .................................................................................................................................................................. 42
CCD Imaging ............................................................................................................................................................................... 42
Fastar F/2 Imaging .................................................................................................................................................................. 44
F/6.3 with Reducer/Corrector................................................................................................................................................... 44
Auto Guiding ........................................................................................................................................................................... 45
TELESCOPE MAINTENANCE........................................................................................................................................................ 46
Care and Cleaning of the Optics .................................................................................................................................................. 46
Collimation................................................................................................................................................................................... 46
OPTIONAL ACCESSORIES ........................................................................................................................................................... 48
APPENDIX A - TECHNICAL SPECIFICATIONS ......................................................................................................................... 51
APPENDIX B - GLOSSARY OF TERMS ........................................................................................................................................ 52
APPENDIX C - LONGITUDES AND LATITUDES ....................................................................................................................... 55
APPENDIX D - RS-232 CONNECTION........................................................................................................................................... 60
Communication Protocol:......................................................................................................................................................... 60
APPENDIX E - MAPS OF TIME ZONES ....................................................................................................................................... 61
SKY MAPS .......................................................................................................................................................................................... 63
OBSERVATIONAL DATA SHEET.................................................................................................................................................. 69
WARRANTY....................................................................................................................................................................................... 70
3