Barnard 138 (Dark nebula)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
From South El Monte , Barnard 138 will become visible at around 17:58 (PST), 48° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 22:21.
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Name
Barnard 138
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Object type
Dark nebula
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Sources