Hello,

this seems to be an old (from 2003) problem but arose again:

For occultations by minor planets the occulted star is mostly given by its TYC
number. I know that this number is mostly identical with the GSC number. But
whatever I use as input,

| GoTo | object name | TYC 621 641
| GoTo | object name | TYC621641
| GoTo | object name | GSC621641
| GoTo | object name | GSC 621 641
| GoTo | Star | Guide Star Catalog | GSC 621 641
| GoTo | Star | Guide Star Catalog | 621 641
| GoTo | Star | Guide Star Catalog | 621641

the result is always the same: "Not a valid object".

In User data sets the "GSC-2.2 data (as stars)" are switched on and the last 4
digits are shown when "GSC numbers on" is set in Star display.

Is there a trick to find a star by its TYC number?

Clear skies
Bernd