Nebulous Clusters in the Small Magellanic Cloud

Located in the Small Magellanic Cloud (SMC), these two objects are designated NGC 346 (upper) and NGC 371 (lower).

The SMC is a nearby small galaxy, 200,000 light years away, visible here in the Southern Hemisphere.

NGC 346

Constellation: Tucana.
Class: nebulous open cluster.
Visual magnitude: +10.3
Apparent diameter: 14 x 11 arc-min. (about 0.45 Lunar Dia.).
Actual diameter: 1150 light years.
Distance: 200,000 light years.

NGC 371

Constellation: Tucana.
Class: nebulous open cluster.
Visual magnitude: unlisted
Apparent diameter: 7.5 arc-min.
Actual diameter: 434 light years.
Distance: 200,000 light years.

Also in the image

NGC 330 9th magnitude open cluster, dia 1.4 arc-min.
NGC 395 open cluster 17.0 arc min dia.
IC 1624 12th magnitude open cluster, 0.7 arc-min dia.
IC 1611, 12th magnitude open cluster, dia 1.0 arc-min.
IC 1612, 12th magnitude open cluster, dia 0.7 arc-min.

Image

Exposure: 31 x 1 min, ISO 4000.
Date: 2017-11-09.
Location: Leumeah, NSW.
Sky: suburban sky, clear.
Moon: no.
Processing: Canon DPP > Deep Sky Stacker > GIMP.
Cropping: yes, 2 x drizzle crop in DSS.

Gear

Imaging telescope: Skywatcher Esprit 120ED Super APO triplet refractor.
Focal length: 840 mm, focal ratio: f/7.
Imaging camera: Canon EOS 60D.
Guiding: off (due to RA corrections failing).
Telescope mount: SkyWatcher EQ6-R.
Polar aligning: QHYCCD PoleMaster.
Field flattener: yes; filter: no.

My gear.

 


Image © R.Powell


 

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