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About NGC 4688
NGC 4688 is a barred spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 1,318±23 km/s, which corresponds to a Hubble distance of 63.4 ± 4.6 Mly (19.44 ± 1.40 Mpc). However, five non-redshift measurements give a much closer mean distance of 24.79 ± 8.02 Mly (7.600 ± 2.458 Mpc). It was discovered by German-British astronomer William Herschel on 17 April 1786.
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