Mar 14, 2010 Hale Pohaku, HI (map)
15cm f/5 Newtonian, Primero @ 55x
Seeing: 7 Transparency: 6.5 Moon: 0%
Small, bright, 5' across, no structure noted, an obvious object when sweeping at low power, M89 visible 50' north, M59 visible 1° east
Apr 18, 1999 Organ Pipe National Monument, AZ (map)
20cm f/10 SCT
Dimmer than M60, core much less intense, no other structure
Rev. T.W. Webb
May 19, 1885 Hardwick, Herefordshire, England (map)
Double [NGC4647 and NGC4649]; p extremely faint [NGC4647]. Not seen 3-7/10in. In large field with M59 np, and H. II 70 sp [NGC4638], like a hazy star.
― Celestial Objects for Common Telescopes, T. W. Webb, 1917
Apr 15, 1779
Nebula in Virgo & in the neighborhood of the preceding [M58], on the parallel of epsilon [Virginis], which has served for its determination: it is of the same light as the above, equally faint. M. Messier reported it on the Chart of the Comet of 1779."
― Connaissance des Temps, 1781
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