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Open Cluster NGC 2194

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

© Copyright by the observers

Astronomical Institutes of the University of Bonn

From Colors to Astrophysics

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.

  • Open Cluster Data 5th Edition (Lynga 1987) at CDS Strasbourg.
  • SEDS infos