Abell 21 (Planetary nebula)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 12 arcminutes across.
Finder chart
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From South El Monte , Abell 21 is visible in the dawn sky, rising at 03:20 (PDT) – 2 hours and 59 minutes before the Sun – and reaching an altitude of 23° above the eastern horizon before fading from view as dawn breaks at around 05:17.
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Name
Abell 21
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Object type
Planetary nebula
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Visibility from South El Monte
All times shown in South El Monte local time.