Messier 41 [SEP] constellation
Messier 41
Messier 41 (also known as M41 or NGC 2287) is an open cluster in the constellation Canis Major. It was discovered by Giovanni Batista Hodierna before 1654 and was perhaps known to Aristotle about 325 BC. M41 lies about four degrees almost exactly south of Sirius, and forms a triangle with it and Nu Canis Majoris—all three can be seen in the same field in binoculars. The cluster itself covers an area around the size of the full moon. It contains about 100 stars including several red giants
33), and 41 (22).
- the lim sup of the largest finite subgroup of the mapping class group of a genus "g" surface divided by "g".
A hepteract is a seven-dimensional hypercube with 84 penteract 5-faces.
In astronomy.
- Messier object M84, a magnitude 11.0 lenticular galaxy in the constellation Virgo
- The New General Catalogue object NGC 84, a single star in the constellation Andromeda
In other fields.
Eighty-four is also: