14./15.8.2012 – observing variable stars and deep sky

Date: 14./15.8.2012
Time: 00:10-02:00
Observing site: Länsi-Aure, Kuru, Finland
Instrument: L102/1000mm (4” refractor)

NELM: 5,7
SQM: 20,59
Darkness of the background sky: 3
Seeing: 3
Transparency: 3
Weather: Mostly clear sky, calm, no Moon, humid air, 10°C

Objects observed: SS Cyg (visual), T Cas (visual), Messier 2 (visual, sketching)

During the 6th session of this season, I was observing in the Länsi-Aure site close to the Seitseminen National Park, Finland. This time I checked SS Cyg and T Cas. SS Cyg is still in maximum, T Cas is fading.This time I was also sketching deep sky, first time in this season! This time I observed and sketched Messier 2, a globular cluster in the constellation of Aquarius. During this session humidity of the air was very high, and condensation of moisture to optical surfaces made things a bit difficult!

Messier 2: @111x,  this globular cluster was visible as a round, fuzzy nebula, which has a pretty even brightness distribution. The brightness increases only slightly towards the center of the cluster and there isn’t any obvious peak in the brightness in the core of the cluster. It is possible to discern few individual stars from the cluster with averted vision.

Messier 2 observed with 4'' Refractor
Messier 2 observed with 4” Refractor

Variable star observations:

Date Time Star Mag. Comp.
14./15.8.2012 00.33 SS Cyg 8.7 8.6
14./15.8.2012 00.55 T Cas 8.9 8.1/8.8

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