NGC/IC Project Restoration Effort

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NGC869

 

Basic Information


Location and Magnitude


Right Ascension: 2:19:4.0
Declination: +57:8:6
Constellation: PER
Visual Magnitude: 5.3

Historic Information


Discoverer: Hipparchus
Year of discovery: -130
Discovery aperture:

Observational


Summary description: ! Cl, vvL, vRi, st 7…14
Sub-type: I3r

Steve's Notes

===== NGC 869 17.5" (10/25/97): this is the brighter and richer western member of the famous "double cluster". Includes a mag 6.6 star near the center and a mag 6.7 star 2.5' NNE. Close following the mag 6.6 star is a neat parabolic group of five stars opening towards the star. On the west side of this star is a rich group of ~20 stars mostly arranged in an incomplete ring. A faint curving string of stars from the mag 6.7 star leads to the parabolic quintet. The 20' field at 220x has too many stars to count, but probably has ~200 stars. 8": this is the western component of the "double cluster". Very bright, large, about 30' diameter. Very rich with about 100 stars resolved, includes several bright mag 6.5-7.0 stars in the center. Forms a pair with NGC 884 at edge of 100x field. Naked-eye (11/13/07): I noticed that the Double Cluster was clearly resolved into two "clumps" naked-eye.