Messier 90

Discovered by Charles Messier on March 18, 1781.

Messier: M90.

March 18, 1781. 90. 12h 25m 48s (186d 27' 00") +14d 22' 50"
"Nebula without star, in Virgo: its light is as faint as the preceding, No. 89."

William Herschel:

[Unpublished Observations of Messier's Nebulae and Clusters. Scientific Papers, Vol. 2, p. 660]
1784. Apr. 8 (Sw. 187). pL. [pretty large], with a nucleus, perhaps cometic, but moonlight permits not to give a proper description.
1784. Apr. 17 (Sw. 199). pL. [pretty large].

Smyth

[from the description of M88]
[has it in a chart]
.. "in the immediate nebulous neighborhood" of 88 Messier ..

John Herschel, General Catalogue: GC 3111.

GC 3111 = M90.
RA 12h 29m 52.8s, NPD 76d 4' 18.1" (1860.0) [Right Ascension and North Polar Distance]
pL; bMN. 2 observations by W. & J. Herschel.
Pretty large; brighter toward the middle where there is a nucleus.
Remark: 3111, M90. The place is from two observations by W.H., as also the description.

Dreyer: NGC 4569.

NGC 4569, GC 3111; M 90.
RA 12h 29m 46s, NPD 76d 3.9' (1860.0) [Right Ascension and North Polar Distance]
pL, bMN; = M90
Pretty large, brighter toward the middle where there is a nucleus.