Observing during The Finnish Deep Sky Meeting, part 1

Date: 11./12.9.2014
Time: 23:00-03:30
Observing site: Tähtikallio observatory, Finland
Instrument: N910/3680mm (35” Astrofox)

NELM: 6.2
SQM: 21.10
Darkness of the background sky: 2
Seeing: 2
Transparency: 2
Weather: Clear sky, calm, warm

Objects observed: Abell 72, NGC 6742 (Abell 50)

Weather was favourable during the Finnish Deep Sky Meeting 2015 and I was able to do some visual observing with the 36” Astrofox of Tähtikallio Observatory Center. Observing conditions were good in terms of Tähtikallio. NELM was about 6.2 and SQM 21.07. There was some slight haze in the sky during the night. During the first night I observed Abell 72 and NGC 6742 (Abell 50).

Abell 72

Abell 72 is a very faint planetary nebula in the constellation of Delphinus. I was observing this object together with Riku Henriksson.

Here are my notes of the observation:

@87x: extremely faint and diffuse nebula. The northern edge of the nebula was the easiest and most obvious part of the nebula. Other parts of the nebula were visible occasionally with averted vision. It is difficult to see the actual shape or orientation of the nebula. OIII is a must with this nebula, it was not at all visible without the filter. Very challenging! Problems with collimation of the instruments, stars not sharp points.

Abell 72 observed with 36'' Newton.
Abell 72 observed with 36” Newton.

NGC 6742 (Abell 50)

NGC 6742, aka Abell 50 is a small planetary nebula in the constellation of Draco, just under the right “wing ” of Cygnus.

Here are my notes of the observation:

@216x: Slightly oval -shaped nebula with long axis in NE – SW orientation. Small and bright. Somekind of ring structure weakly visible with averted vision. Easily seen also without OIII filter, the filter didn’t improve the wiev much. Easy one! Problems with collimation of the instruments, stars not sharp points.

NGC 6742 (Abell 50) observed with 36'' Newton.
NGC 6742 (Abell 50) observed with 36” Newton.
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