[3][a] It can be seen from Earth under a good night sky with binoculars.

The brightness of the cluster is influenced by extinction, which is stronger in the southern half.

[7] R. J. Trumpler classified the cluster appearance as II2r, indicating a rich cluster with little central concentration and a medium range in the brightness of the stars.

[4] It has an estimated age of 158.5 million years[1] and a mass of 1,200 M☉.

[4] The magnitude 8.3 supergiant star BD +60°2532 is a probable member of the cluster,[4] so too 18 candidate slowly pulsating B stars, one being a Delta (δ) Scuti variable, and three candidate Gamma Doradus (γ Dor) variables.