LDN 1639 (Dark nebula)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 59 arcminutes across.
From South El Monte , LDN 1639 is visible in the dawn sky, rising at 03:00 (PDT) – 3 hours and 20 minutes before the Sun – and reaching an altitude of 27° above the eastern horizon before fading from view as dawn breaks at around 05:18.
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Name
LDN 1639
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Object type
Dark nebula
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