NGC 2129 · open cluster

NGC 2129

NGC 2129 is an open cluster in the constellation Gemini.

RA06h 01m 06sDec+23° 19' 19"

Image: Sloan Digital Sky Survey. CC BY 4.0, via Wikimedia Commons.

Identity & coordinates

Identification

Primary designation: NGC 2129
All designations: NGC 2129
Object type: Open Cluster
Constellation: Gemini
Best viewing: Winter · Spring

Coordinates & physical

Right ascension (J2000): 06h 01m 06s
Declination (J2000): +23° 19' 19"
Apparent magnitude (V): —
Distance: —

III

Visibility tonight

The science

NGC 2129 is an open cluster in the constellation Gemini. It has an angular diameter of 2.5 arcminutes and is approximately 2.2 ± 0.2 kpc from the Sun inside the Local spiral arm. At that distance, the angular size of the cluster corresponds to a diameter of about 10.4 light years. NGC 2129 is a very young cluster whose age has been estimated at 10 million years. It was discovered by William Herschel on November 16, 1784

Summary adapted from Wikipedia · CC-BY-SA-4.0