Discovered by Philippe Loys de Cheseaux 1745-46.
Independently discovered by John Bevis before 1750.
[Mem. Acad. for 1771, p. 449 (first Messier catalog)]
In the night of August 30 to 31, 1764, I have observed a cluster of very
small stars, near the left foot of Castor, little distant from the stars Mu
& Eta of that constellation [Gemini]. When examining this star cluster
with an ordinary [non-achromatic] refractor of 3 feet [FL], it seemd to
contain nebulosity; but having examined it with a good Gregorian telescope
which magnified 104 times, I have noticed that it is nothing but a cluster
of small stars, among which there are some which are of more light; its
extension may be 20 minutes of arc. I have compared the middle of this
cluster with the star Eta of Castor [Eta Geminorum]; its right ascension
has been concluded at 88d 40' 9", & its declination at 24d 33' 30" north.
[p. 457]
1764.Aug.30. RA: 88.40. 9, Dec: 24.33.30.B, Diam: 0.20.
Cluster of small stars near the left foot of Castor [one twin in Gemini], at
little distance from the stars Mu & Eta of that constellation. This
cluster doesn't contain any nebulosity.
Last Modification: May 22, 2005