1771 G1


1758 Y1
1762 K1
1763 S1
1766 & 1783
1769 P1
1771 G1
1772 E1
1774 P1
1779 A1
1780 U2
1783 X1


C/1771 G1 (Messier) - two maps: map 1 / map 2

click on the image for a larger view (you will be redirected to my pbase-pages).

The Pleiades (M45), the Crab-Nebula (M1) and M35 and M37 are drawn.





click on the image for a larger view (you will be redirected to my pbase-pages).

On this chart Messier mentions a 'cone of light' that he observed on June 3rd 1771.
 It stretched along the heavens all the way from Castor/Pollux to Capella.

This is what Messier reports on this phenomenon:
"The same evening (June 3rd 1771), with a clear and quiet sky, around 9 hours, examining the sky near the horizon where the Comet had set, I noticed, some 20 degrees above the horizon, close to the head of Gemini, a cone of light, easy to see, resembling the tail of a Comet, with an approximate length of 25 degrees from one side to the other, and a width of approximately 6 to 7 degrees on one side, the other end ending in a nucleus, being brighter and more condensed that the tail, so that I initially took this light for a Comet, and I was only to be certain that it wasn’t after having examined it with a telescope: this light was whitish and was moving like rays of Aurora Borealis; it was brighter towards the point of the nucleus, than at the middle or the widened part; these waves of light would start at the nucleus and move along the cone until the end, the moment one of these lights was diminished another would follow: one was able to observe the form and movement of the cone of light from minute to minute, by comparing the distance from the core with one of stars in the head of Gemini, it went from the head of Gemini towards that of Leo: this phenomenon lasted about a good half hour, and then gradually disappeared. I have made a drawing of this light, as I have seen it, from α of Gemini and Auriga, on the second Chart of the appearance of the Comet."

Charles Messier: Cône de lumière semblable à la queue d’une Comète.
Histoire de l’Académie Royale des Sciences, année MDCCLXXVII, (Paris, MDCCLXXX). Page 167

Start | 1758 Y1 | 1762 K1 | 1763 S1 | 1766 & 1783 | 1769 P1 | 1771 G1 | 1772 E1 | 1774 P1 | 1779 A1 | 1780 U2 | 1783 X1