|Date:||14.10.01||Time:||0:25 UT||Exposure:||30 min|
|Field of View:||4.2o x 5.3o||Emulsion:||Kodak Ektachrome 200/400||Filter:||none|
|Instrument:||f=300mm 1/4.5||Place:||Römerstein, Alb||Observer:||Till Credner|
© Copyright by the observers
This loose type of open cluster is also called an OB-Association since the clustered stars are mainly of the young, massive, and hot spectral types O and B. These associations are quite instable and have short lifetimes before they evaporate into space.