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Hi Mark,
Barnard 72 is a dark cloud "nebula", dimensions 37 by 17 arcminutes.
SIMBAD cross-referencing indicates there is no NGC or IC number for it.
If you're trying to track it down, your best bet is to locate the magnitude 6.7 star HD 157398 (SAO 185357) which is only about 6 arcminutes south of it.
Regards, Rob
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