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 evening sky, becoming accessible around 18:20 (PST), 27° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:43, 69° above your southern horizon. It will continue to be observable until around 03:31, when it sinks below 21° above your western horizon.
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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] |
| Angular dimensions: | 12.4 arcmin x 8.5 arcmin |
Sources