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| Date: | 23./24.10.1995 (V&I/B) | Time: | 0:46 UT (V,I), 2:55 UT (B) | Exposure: | B:30m, V:19m, I:17m |
|---|---|---|---|---|---|
| Field of View: | 20' x 19' | Receiver: | WWFPP, 20482 CCD | Filter: | B, V, I |
| Instrument: | 1.23m | Observatory: | Calar Alto | Observer: | T. Credner, S. Kohle |
Astronomical Institutes of the University of Bonn
This three color composite
is consisting of Johnson B, V, and
I filter exposures, represented in blue, green, and red respectively.
The Open Star Cluster NGC 2194 has a distance of 1600 pc in the direction
of the constellation Orion.
Most stars of the cluster have a slightly blue color, but there are also
a lot of bright and yellow stars. They are evolved, i.e. they
already left the usual stage of hydrogen burning in the core. This is a hint for the
relativ old age of the cluster. Indeed NGC 2194 is with 109
years about ten times older than the cluster
M 50, and so belongs to the unusual population
of old Open Clusters in our Galaxy.