Cr 399
Collinder 399 (Brocchi's Cluster, Coathanger Cluster)
labels on/off
Date: | 31.05.06
| Time: | 3:22 UT
| Exposure: | 15 min
|
Field of View: | 4.1o x 3.3o
| Emulsion: | Fuji Provia 400F
| Filter: | none
|
Instrument: | f=300mm 1/4
| Place: | Hakos, Namibia
| Observer: | Till Credner
|
© Copyright by the observers
Cr 399 is a prominent group of stars in the constellation of Vulpecula.
Resembling an upside down coathanger, it is easily found with the smallest
binoculars in the northern summer milky way. Such distinctive groupings,
no official constellation and in most cases no physical star cluster,
are called asterisms. Data of the astrometric satellite HIPPARCOS revealed,
that Cr 399 is not a cluster of physical related stars. It is just an
alignment by chance of stars with very different motions and distances.