Coordinate system & epoch
Select coordinate system and epoch for Equatorial / Ecliptic coordinates.
The epoch is ignored if Galactic (G) is
selected for the coordinate system.
The Coordinate system & epoch, Longitude and Latitude
are overridden if the Object name if given.
Note: B1950 is not accepted for target list.
Longitude
Enter the longitude of the queried coordinates.
Either a sexagesimal expression with the separator ':' or a
decimal degree expression is accepted. It is not necessary to use
the same expression that used for Latitude. Note that in
the sexagesimal expression the highest term is to be interpreted as
'hour' in the 'Equatorial' coordinate systems while as 'degree'
in the 'Ecliptic' and 'Galactic' coordinate systems.
Latitude
Enter the latitude of the queried coordinates. Either a sexagesimal
expression with the separator ':' or a decimal degree expression is
accepted. It is not necessary to use the same expression that used
for Longitude. The preceding '+' is optional.
Observation period
Select the observation period to be considered.
Note that the periods are defined for user's convenience and
are not the final operation plan.
Object name & Name resolver
Enter the object name and select the name resolver engine.
This Object name input, if any, overrides the inputs of
Coordinate system & epoch, Longitude and Latitude.
The character string given in the text field is submitted as is to the resolver
engine, accordingly the available expression of the object name is
engine-dependent; refer to the original documents
(SIMBAD,
NED) for detail.