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About NGC 5988
NGC 5988 is a large spiral galaxy in the constellation of Serpens. Its velocity with respect to the cosmic microwave background is 10697 ± 10 km/s, which corresponds to a Hubble distance of 514.6 ± 36.0 Mly (157.78 ± 11.05 Mpc). However, one non-redshift measurement gives a much larger distance of 668.62 Mly (205.000 Mpc). It was discovered by American astronomer Lewis Swift on 17 April 1887.
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