NGC6840 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
From South El Monte , NGC6840 will become visible at around 19:16 (PDT), 67° above your southern horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 01:44.
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Name
NGC6840
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Object type
Open cluster
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Source