Gemini Users Manual 76
Note: The “Sync or Align” commands are used only to modify the behavior of the serial
line commands and do not in any way affect the “Synchronize” or “Additional Align”
commands found in the Gemini menu tree.
5.3.10.10.3 Coordinate Epoch
• Equinox of Date
• Epoch J2000.0
This menu item allows you to tell Gemini whether celestial coordinates entered via the
Hand Controller or the PC are to be mathematically precessed to the equinox of the date
(i.e. they are Epoch J2000.0 coordinates), or whether they are already valid for the
current equinox and must not be precessed. By default, Gemini assumes that object
coordinates transferred by a planetarium program and any coordinates input through the
Hand Controller are for the epoch of the current date (current equinox). This default can
be changed to Epoch J2000.0 by executing "Setup→ Communication→ Coordinate
Epoch→Epoch J2000.0." Similarly, to change to the "Equinox of Date," execute
"Setup→ Communication→ Coordinate Epoch→Equinox of Date."
Note: These settings only apply to data sent from the PC to Gemini. Coordinates sent
from Gemini to the PC always refer to the Equinox of the current date. This avoids
confusion for the software that is controlling the Gemini system.
IMPORTANT: Epoch J2000.0 coordinates and Equinox of the Date coordinates cannot
be mixed since Gemini has to be set to recognize one or the other. Also, the coordinates
in the resident catalogs, the User Database, and Bookmarks, are not affected by how this
menu item is set.
5.4 QuickMenu
• {Focusing}
•
Photo Mode /
Visual Mode
• Reduced Menu / Full Menu
• Centering
• Park Mount!
• {Meridian Flip}
• Exit w/o Change
The "QuickMenu" is a convenience that is accessed by holding down the MENU button
for at least a second. Useful menu items such as Centering Speeds, Hand Controller
Modes and a Park Mount command scroll through the display. The item that is displayed
at the moment you release the button is the one selected, and Gemini returns to the
Telescope Control Mode or to a submenu; an exception is described in section 5.4.1
{Focusing} below.
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