Abell cluster 21 (Galaxy cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From South El Monte , Abell cluster 21 is visible in the morning sky, becoming accessible around 20:00, when it reaches an altitude of 21° above your eastern horizon. It will then reach its highest point in the sky at 01:26, 84° above your southern horizon. It will be lost to dawn twilight around 05:34, 37° above your western horizon.
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Name
Abell cluster 21
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Object type
Galaxy cluster
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Position
| Right ascension: | 00h20m [1] |
| Declination: | +28°37' [1] |
| Constellation: | Andromeda |
| Magnitude: | 16.20 (R) [1] |