NGC 2355

NGC 2355 also known as NGC 2356,^[3] is an old open cluster in the constellation Gemini.

NGC 2355
SDSS
Observation data (J2000 epoch)
Right ascension	07h 17.0m [1]
Declination	+13° 47′[1]
Distance	5.38 kly[2] (1.65 kpc)
Apparent magnitude (V)	9.7[1]
Apparent dimensions (V)	5′[2]
Physical characteristics
Other designations	Cr 133, NGC 2356[3]
Associations
Constellation	Gemini
See also: Open cluster, List of open clusters

It is approximately a billion years old and is located about 5,400 light years (ly) from the Solar System and 1,100 ly above the plane of the Milky Way galaxy. At that distance, the angular size of the cluster halo corresponds to a radius of about 23 ly. The core radius is 2.3 ly, and the central component radius is 11 ly.^[2]