Category Archives: Astronomy

Messier 13

This is a photo taken during a calibration procedure of the telescope. It was working totally unguided. The shoot was at direct focus of the Newtonian so it was working at 0.33arcsec/pixel. Great result for an home made mount.

Plato crater 20 Jul 2022

Based on Lunar Orbiter IV images we have some reliable measurements.
The crater itself is about 100Km diameter.
At south-west there is Montes Teneriffe, its elevation was of 2.4Km and a base diameter of 112 Km, at the right the Plato rimae (incomplete in the picture)

Internally we have the big four

A = 1.7 miles (2.7 km)
B = 1.5 miles (2.4 km)
C = 1.5 miles (2.4 km)
D = 1.3 miles (2.1 km)

+1 on the west-northwest wall
W = 2.0 miles (3.2 km)

The “Little Four”
e = 1.2 miles (1.9 km)
f = 1.0 miles (1.6 km)
g = 0.94 miles (1.5 km)
h = 1.4 x 0.8 miles (2.2 x 1.3 km)


The “Tiny Nine”
i = 0.7 miles (1.2 km)
j = 0.6 miles (1.0 km)
k = 0.7 miles (1.3 km)
l = 0.6 miles (1.0 km)
m = 0.7 miles (1.2 km)
n = 0.7 miles (1.1 km)
o = 0.7 miles (1.1 km) (double craterlet)
p = 0.7 miles (triple craterlet)
q = 0.6 miles (1.0 km) (double overlapping crater)