37 Cluster (NGC 2169)

NGC 2169
NGC 2169: Section of the colorized DSS2 [147]


The cluster was probably first noticed by the Italian astronomer Giovanni Battista Hodierna, which published it in 1654. But this publication of his work was little noticed outside Sicily. [196] The cluster was rediscovered on 12th October 1782 by William Hershel using his little 6.2 inch telescope. He cataloged it as VIII 24 (class VIII = coarsely scattered clusters of stars) and noted: «A small cluster of pretty large white stars.» [463] In 1888 John L. E. Dreyer added the cluster with the designation NGC 2169 to his famous «New General Catalogue» [313]

In 1931 Per Collinder published his «Catalog of Open Galactic Clusters» where this cluster is listed as Collinder 83. [455] The cluster is also nicknamed «37 Cluster» due to its brightest members forming an asterism that looks like the number 37.

Physical Properties

The age of this rather young cluster is estimated to about 11 million years. [138]

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke [277]
DesignationNGC 2169
TypeOCL (I3p)
Right Ascension (J2000.0)06h 08m 24.3s
Declination (J2000.0)+13° 57' 53"
Diameter6 arcmin
Visual magnitude5.9 mag
Metric Distance1.032 kpc
Dreyer DescriptionCl, S, lRi, pmC, ** Σ 848
Identification, RemarksOCL 481

Finder Chart

The open cluster NGC 2169 is located in the constellation of Orion, which is best visible from October to February.

Finder Chart 37 Cluster (NGC 2169)
37 Cluster (NGC 2169) in constellation Orion. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Visual Observation

Description pending ...

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