Click for hires
Scorpii is the orange brigh star at lower-left, but the most
insteresting object here an open cluster and a nebula. The main open
cluster is NGC 6321 and shows a "tail" of stars toward the right: this
feature generated the name of "comet cluster" because from northern
latitudes it may resemble a comet with a coma (the cluster) and a tail
(the nearby stars), transiting very low on the horizon and with the tail
The main nebula is IC 4628, at right, but some faint nebulas are present also on the left.
Two other prominent open cluster are present in the field: NGC 6242 at right-middle, and NGC 6268 at right-top.
Behind all those object lies the Milky Way and its star clouds and dark nebulas.
||Pentax 75 apo refractor
(single exp of 10 min)
EOS 5D with Baader filter
(Namibia) at 1350 m height
|27 August 2011
||Lodestar with a small refractor (F.L. 100 mm, aperture 23 mm)
||T= +11°C, RH=28%
|Sky brightness at
zenith (with SQM-L)
||21.7 mag/arcsec^2 (MW at zenith)
||North at right.
image is a collaborative effort of the Namibia 2011 expedition.
Processing: Lorenzo Comolli. Images by: Lorenzo Comolli, Luigi Fontana,
Giosuè Ghioldi, Emmanuele Sordini.