eta cassiopeiae
double star
sep=11
location:roudehen-tehran-iran
pencil sketch
inverted
medicore seeing:4.5
120x
orion 10 inch telescope
eta cassiopeiae
double star
sep=11
location:roudehen-tehran-iran
pencil sketch
inverted
medicore seeing:4.5
120x
orion 10 inch telescope