IC2391 + NGC2669, Omicron Velorum Cluster and part of Vela supernova remnant

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Two open clusters are near the center of the image. IC 2391 is quite scattered, with Omicron Velorum as the brighter star of this field (mag. 3.6, apparent mag. of the cluster 2.6). The other is NGC 2669 and is a smaller cluster on the left of the latter. Behind and in the neighborhood of both lies some faint and peripheral nebulae of the Vela supernova remnant.
 
Technical Data
Optics Pentax 75 apo refractor
Focal Lenght 500 mm
Focal Ratio f/6.7
Exposure Time 40 min (single exp of 10 min)
CCD Canon EOS 5D with baader filter
Sensitivity 800 ISO
Location Tivoli Farm (Namibia) at 1350 m height
Date
 3 September 2011
Mount Kenko NES
Tracking Lodestar at 100 mm focal length
Temperature and humidity T= 0°C, RH=40%
Sky brightness at zenith (with SQM-L) 21.9 mag/arcsec^2
Notes Very dark sky but really short exposure, because this was just a "filler" to finish the last night of a 10 days trip to Namibia.
This image is a collaborative effort of the Namibia 2011 expedition. Processing: Lorenzo Comolli. Images by: Lorenzo Comolli, Luigi Fontana, Giosuè Ghioldi, Emmanuele Sordini.

HTML Editing and Publishing by Lorenzo Comolli. Email me at comolli@libero.it.
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