The Astir or Aster was a small passenger ship of the Papaleonardou Shipping Company about which I know very little ...
She came to Greece in 1897. Here is a schedule from April 27, 1901 when the ship was going to Argosaronikos, Argolikos but also all the way down to Kyparissi!
19010427 Astir.jpg
Mentioned also here as one of three Papaleonardos ships, the other two being Aris and Amfitriti
Ellinis do you have anything more?