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iOptron 8401 manual FIG.D2, δ, declination, t, hour angle

Models: 8401

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	Celestial	Zenith
	North Pole	Zenith
	North Pole
		median of
		location

δ, declination

East

North

Celestial Equator

Nadir

t, hour angle

M, midpoint

South

Observer’s horizon

West	star hour circle
axis of rotation

Celestial

South Pole

FIG.D2

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Image 29

iOptron 8401 manual FIG.D2, δ, declination, t, hour angle

Contents

GoToNovaTM 8401 Hand-Held Controller Manualwww . iOptron . com Page CONTENTS Page Chapter 0 Quick Start Reference The Hubble Site Sky and TelescopeUseful Links http//hubblesite.org0.2 Getting Started A GPS module makes life a lot easier. It automatically sets the time and location for youSet Local Time 2007-06-18 Daylight Time saving√ What’s Next? 1.0 Basic Symbols Chapter.1 Set Up And Alignment1.1 Set Up Appendix1.2.2 Two-Star Align Appendix Chapter. 2 Select And SlewNEVER LOOK DIRECTLY AT THE SUN WITH THE NAKED EYES OR WITH You can define and save new celestial objects in the database2.5.4 Variable Stars 2.5 Stars 2.5.1 Named Stars Contains 191 stars 2.5.2 Constellations2.5.5 SAO Bright Stars 2.6 Constellations Contains 88 constellations 2.7 User Objects3.4 Set up tracking Set up tracking speed 3.5 User objects Chapter. 3 Other FunctionsAppendix Check Appendix A for complete menu structuresFIG.4 Equatorial ModeUse slower speed for fine tuning Chapter. 4 How to Observe4.2 Observing using arrow keys People usually use alt-zi mode to observe land objects4.4 Tracking APPENDIX A MENU STRUCTURE o M44 Praesepe, the Beehive Cluster open cluster APPENDIX B Messier Catalogo M51 The Whirlpool Galaxy spiral galaxy o M63 Sunflower galaxy spiral galaxyo M42 The Great Orion Nebula diffuse nebula o M57 The Ring Nebula planetary nebulao M43 part of the Orion Nebula de Mairans Nebula diffuse nebula o M76 The Little Dumbell, Cork, or Butterfly planetary nebulao M7 Ptolemys Cluster open cluster o M6 The Butterfly Cluster open clustero M11 The Wild Duck Cluster open cluster o M1 The Crab Nebula supernova remnantModern Constellations APPENDIX Cconstellation genitiveCanis Minoris 1690, Firmamentum Sobiescianum, Hevelius Lynx 1690, Firmamentum Sobiescianum, HeveliusMicroscopium 1624, BartschPiscis Austrinus PiscesPuppis PyxisVolans 1690, Firmamentum Sobiescianum, HeveliusAustrale FIG.D1 APPENDIX D Celestial CoordinatesAltitude Azimutht, hour angle FIG.D2δ, declination δ, declination α, right ascension FIG. D3You need two numbers to define a position on the celestial sphere Celestial sphere is an imaginary sphere of infinite radiusPage GoToNovaTM 8401 Specifications Appendix E SPECIFICATIONSProducts List Appendix FItem # ProductIOPTRON TWO YEAR TELESCOPE, MOUNT, AND CONTROLLER WARRANTY