Abell 21 (Planetary nebula)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 12 arcminutes across.
From South El Monte , Abell 21 is visible in the dawn sky, rising at 03:16 (PDT) – 3 hours and 3 minutes before the Sun – and reaching an altitude of 24° above the eastern horizon before fading from view as dawn breaks at around 05:18.
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Name
Abell 21
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Object type
Planetary nebula
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Position
| Right ascension: | 07h29m [1] |
| Declination: | +13°15' [1] |
| Constellation: | Gemini |
| Magnitude: | 10.20 (V) [1] |
Sources