Datatype: hk CCD

This datatype (hkccd) collects the CCD photometric observations of stars in open clusters made with the combination of Strögrem and the Ca filters measuring the CaII HK line forming the Caby system. The hk parameter is defined by : hk = (Ca - b) (b - y) by Twarog et al. 1991.

Record structure

No:Star number
V:V magnitude
b-y:b-y colour index
hk:hk parameter

Database access

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Last Update: 2005 February 4