Discovered on May 5, 1779 by Barnabus Oriani.
Indepedently discovered on May 11, 1779 by Charles Messier (who had also seen it
on May 5).
Sweep 142 (April 9, 1828)
RA 12h 13m 13.7s, NPD 84d 34' 56" (1830.0)
B nucleus in a v F atmosph 2' diam, gradually fading away
Bright nucleus in a very faint atmosphere of 2' diameter, gradually fading
away.
Sweep 143 (April 10, 1828)
Viewed; v faintly bicentral. The two nuclei 90" dist pos 45..50 deg nf.
Viewed; very faintly bicentral. The two nuclei are 90" distant in position
angle 45..50 deg north following [NE].
[Appendix]
[Figure on Plate XV, Figure 69, No. 1202, M. 61 = I. 139,
RA 12h 13m 13s, NPD 84d 35']
Plate XV. Fig. 68-79.
- Double Nebulae.
Last Modification: February 19, 2005