LBN 640 (HII region)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 35 arcminutes across.
Finder chart
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Click to enlarge.
From Cambridge , LBN 640 will become visible at around 19:52 (EDT), 43° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 22:42 when it dips 21° above your north-western horizon.
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Name
LBN 640
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Object type
HII region
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Visibility from Cambridge
All times shown in Cambridge local time.