Butterfly Cluster

Observed:  Points: 30

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Current Info for Observer

as of 06/07/2020 9:48 a.m.

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General Info

TypeOpen Cluster
Right ascension17h40'20.700''
Size25 arc min
Catalog Designations NGC6405, M6
Discovered 1654 Giovanni Hodierna

Generate a finder chart

The following form will generate a PDF finder chart suitable for printing using to locate objects in the sky with your telescope!

The Date is only really useful for solar system objects, as deep space objects move measurably only on a galactic timescale.

The larger the F.O.V (field of view), the more "zoomed out" the object will appear. It can be helpful to print several charts of the same object with different field of views.

Limiting the magnitude (remember, lower magnitude means brighter!) of stars and objects can make sure your chart is not cluttered with dim objects that you may not be visible to you anyway. The defaults are good, but try experimenting with raising and lowering the values.

Bright and resolvable in the 9x50 finder. Butterfly shape apparent in both finder and telescope. 15-25 stars visible.

This open cluster was relatively easy to find. Spent a few minutes sweeping across the cluster, couldn't get the full butterfly-ish shape in my FOV. Must get binocs and/or larger eyepieces.

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