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Gemini Users Manual 56
5.3.2.6 IC (Index Catalog)
There are 5437 objects stored in this catalog, among which are nebulae, galaxies and
clusters. To select one of them, type in its catalog number and press the RA+ button.
The object's designation, hour angle and elevation will be displayed, indicating that it has
been selected.
Note: Both NGC and IC catalogs include some objects identified by an extension letter
after the numeric identification. For example, NGC 6246 and 6246A are both in the NGC
catalog. To select such objects, use the keypad keys to enter the numeric designation as
with any other NGC or IC object. However, when you press the RA+ button after the
numeric designation, you will see a “→” symbol after the number. This symbol indicates
that you can either press the RA+ button again to select the object without an extension
letter, or you can press DEC+ or DEC- to scroll through the extension letters for that
object. For example, if you enter “NGC 6246” and press RA+, you will see “NCG
6246→” in the display. Pressing the RA+ key again selects NGC 6246. However, if
instead, you press the DEC+ or DEC- key, the “→” changes to “A” and the display reads
“NGC 6246A.” Press the RA+ key to select NGC 6246A.
5.3.2.7 Sh2- (Sharpless 2 Catalog)
There are 313 HII objects of the Sharpless 2 catalog stored in Gemini. To select one of
them, type in its catalog number and press the RA+ button. The object's designation,
hour angle and elevation will be displayed, indicating that it has been selected.
5.3.2.8 Solar System (Solar System Catalog)
There are 10 objects (8 planets, the Sun and the Moon) stored in this catalog. To select
one of them, scroll through the list until you see the one desired, and press the RA+
button. The object's designation, hour angle and elevation will be displayed, indicating
that it has been selected.
WARNING: Never point the telescope at the Sun without proper filtration! Doing so
can cause severe damage to your eyes and your equipment.
5.3.2.9 Bright Stars (Bright Star Catalog)
There are 169 Bright Stars with their common names stored in this catalog and arranged
alphabetically. To select one of them, scroll through the alphabet until you see the first
letter of the star’s common name. Press RA+ to display the list of all stars that begin
with that letter. Scroll through the list until you see the star desired, and press the RA+
button. The object's designation, hour angle and elevation will be displayed, indicating
that it has been selected.
5.3.2.10 SAO (Smithsonian Astrophysical Observatory Catalog)
This is a subset of the Hubble Guide Star Catalog (GSC) containing 17636 stars down to
the 7
th
magnitude. To select one of them, type in its catalog number and press the RA+
button. Gemini responds by confirming the object's catalog number and also its
magnitude (e.g. "6m4" means magnitude 6.4). If the desired object is not in Gemini's
- Users Manual 1
- Table of Contents 2
- 1 Introduction 6
- 1.2 Features 7
- 1.3 What’s New in Level 4? 10
- 2 Getting Started 13
- 2.2 Installation 14
- 2.2.3 Encoders 15
- 2.2.4 Power Requirements 16
- 2.3.1 Controls 16
- 2.3.3 QuickMenu 18
- 2.4 Basics of Operation 19
- 2.4.1.2 Startup Position 20
- 2.4.2 Power On and Setup 20
- 2.4.2.2 Completing Startup 23
- 2.4.2.3 Preferences 23
- 2.4.4 Normal Operation 27
- 2.5 Next Steps 28
- 3.1.2 Precession 30
- 3.2 How the Sky Moves 31
- 3.3 Tracking 31
- 3.3.1.1 Predefined Rates 32
- Training Comet Tracking 35
- Timer Values 35
- PC Controlled Tracking 36
- 3.3.2 Meridian Flip 37
- 3.3.3 RA Safety Limits 37
- 3.4 Polar Alignment 39
- 3.4.3 Accuracy Required 41
- 3.5 Mount Modeling 42
- 3.5.3 Modeling Parameters 44
- 4.2 Guiding 45
- 4.2.2 Manual Guiding 46
- 4.2.5 Software Guiding 47
- 4.3.2 The PEC Submenu 49
- 4.3.2.1 Train PEC 49
- 4.3.2.2 Clear Data 50
- 4.3.2.3 Turn PEC On/Off 50
- 4.3.2.4 Delay Correction 50
- 4.3.2.5 Drift Correction 51
- 4.3.2.6 Smooth Data 52
- 4.3.2.7 Average Data 52
- 4.4 Other Functions 53
- 5.1 Startup Mode Menu 54
- 5.2 The Main Menu 55
- 5.3 Subordinate Menu System 56
- 5.3.1.2 {Reset Alignment} 57
- 5.3.1.3 {Additional Align} 57
- 5.3.1.4 Synchronize 58
- 5.3.1.5 {Polar Al. Assist} 58
- 5.3.1.6 {Polar Axis Corr.} 58
- 5.3.2 Object Database 59
- 5.3.2.1 Database Use 59
- 5.3.2.2 Accuracy and Epochs 60
- 5.3.2.3 Credits 60
- 5.3.2.6 IC (Index Catalog) 61
- 5.3.6.1 RA/DEC Display 64
- 5.3.6.2 Enter RA/DEC 64
- 5.3.6.3 Az/El Display 64
- 5.3.6.4 Enter Az/El 65
- 5.3.6.5 Set Bookmark 65
- 5.3.6.6 {GoTo Bookmark #n} 65
- 5.3.7 Identify 65
- 5.3.8 Object Search 66
- 5.3.8.2 Wobble Object 67
- 5.3.9 Show Date/Time 67
- 5.3.9.2 Julian Date 67
- 5.3.10 Setup 68
- 5.3.10.1 Hand Controller 69
- 5.3.10.2 Mount Parameters 69
- 5.3.10.2.1 Tracking Speed 70
- 5.3.10.2.2 Moving Speeds 71
- 5.3.10.2.5 Mount Type 72
- 5.3.10.2.8 {Pointing Model} 75
- 5.3.10.3 Encoder 76
- 5.3.10.4 Alarm/Buzzer 76
- 5.3.10.5 UTC Date/Time 77
- 5.3.10.6 Credit Info 77
- 5.3.10.7 Restore Defaults 78
- 5.3.10.8 Dim Display 78
- 5.3.10.9 Geogr. Location 78
- 5.3.10.9.5 Store Site 79
- 5.3.10.9.6 Load Site 79
- 5.3.10.10 Communication 80
- 5.3.10.10.2 Sync or Align 80
- 5.4 QuickMenu 81
- 5.4.1 Focusing 82
- 5.4.4 Centering 82
- 5.4.5 Park Mount! 83
- 5.4.6 Meridian Flip 83
- 5.4.7 Exit w/o Change 83
- 6 Serial Communication 85
- 6.2 Hand Controller port 87
- 6.3 Serial Command Sets 88
- 6.5.1 Telescope Driver 90
- 6.5.3 Coordinate Epoch 90
- 6.6 Using Control Programs 91
- 7 Troubleshooting 92
- 7.2 Debug Mode 96
- 8 Appendices 97
- QuickMenu 101
- Cold Start Setup Menu 101
- *Reduced Menu 101
- 8.2 Catalogs 102
- 8.3 Alignment Star List 103
- 8.4 Serial Line Protocol 105
- • Right Ascension 112
- • Declination {+ 112
- • the object name (up to 10 112
- Gemini Native Commands 116
- 8.5 Serial Communications 129
- 8.6 Autoguider Port 130
- 8.7 Encoder Port 132
- Connecting End Switches 133
- 8.8 Feature Port 134
- 8.9 Motor Connector Pinouts 135
- RJ-45 Connector 135
- DIN Connector 135
- 8.10 Power Connector Pinout 136
- Power Connector 136
- 8.11 Upgrading the EPROM 137
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