1° Forum di Astronomia Amatoriale Italiano

Non ho riscontrato il medesimo problema. Con Perseus collegato al Losmandy Gemini System via protocollo LX200 riesco a puntare qualunque oggetto (compresi pianeti, comete ed asteroidi) con la consueta ottima precisione tipica del Gemini.

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.