I can not be sure but this may be Hellas Sat 3 39E. It is between Turksat 42E and Athena Fidus 37.8E. There are 4 or more 800kHz wide data signals and one 300kHz wide. There is a carrier on 18717.8MHz and possibly 2 other weak carriers nearby. The weak ones could be spurii.
Polarisation is circular but received on a linear feed. No other signals visible between 18.5 and 20.5GHz
A peak was visible on Crazyscan but the individual signals were not separable or lockable.
The frequency accuracy is +/-100kHz
1.2m Offset