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NGC 6401 | |
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Observation data (J2000 epoch) | |
Constellation | Ophiuchus |
Right ascension | 17h 38m 36.93s |
Declination | −23° 54′ 31.5″ |
Distance | 24.450 |
Apparent magnitude (V) | 7.40 |
Apparent dimensions (V) | 4.8' |
Physical characteristics | |
Other designations | ESO 520-SC011, GCL 73, H I-44, h 1982, h 3697, GC 4314 |
NGC 6401 is a globular cluster in the constellation Ophiuchus. William Herschel discovered this star cluster in 1784 with his 47 cm telescope, but mistakenly believed it to be a bright nebula. Later his son, John Herschel, was to make the same error because the technology of the day was insufficient to allow the individual stars to be resolved visually.
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