sebagr on 09-Sep-2024 20:10:22 GMT about IC 1805
IC 1805 is not the same as SH 2-190 - the former is an open cluster, while the latter is a nebula. They are not different identifiers of the same object but actual different objects. The nebula spans between 1 and 2 degrees, while the open cluster is much smaller.
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View annotation on IC 1805 object