NGC 7789

Open Cluster NGC 7789 (= H VI.30), type 'e', in Cassiopeia

[NGC 7789, Kohle/Credner]
Right Ascension 23 : 57.0 (h:m)
Declination +56 : 44 (deg:m)
Distance 7.6 (kly)
Visual Brightness 6.7 (mag)
Apparent Dimension 16 (arc min)

Discovered by Caroline Herschel in 1783.

When Caroline Herschel discovered this cluster in fall 1783, her brother William included it in his catalog as H VI.30.

This cluster has been classified as of Trumpler type II 2 r.

The image in this page was obtained by Till Credner and Sven Kohle. It was cropped from a larger image, which they had obtained within their Constellation Cassiopeia photography. The image displayed here was cropped and magnified from a much larger, wider-field (39x27 deg) color film (Kodak Royal Gold 400 Select) image. It was taken by Till Credner and Sven Kohle on September 24, 1998, 00:43 UT, from Alfarnate, Andalucía, Spain with a 50mm f/4.0 photo lens, and is a 40-minutes exposure.

  • NGC 7789 was featured as Deep Sky Object of the Month September 2001 by the East Valley Astronomy Club (EVAC)

  • Jean-Claude Mermilliod's WEBDA cluster page for NGC 7789
  • SIMBAD Data of NGC 7789
  • Publications on NGC 7789 (NASA ADS)
  • Observing Reports for NGC 7789 (IAAC Netastrocatalog)
  • NGC Online data for NGC 7789

    Hartmut Frommert
    Christine Kronberg
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    Last Modification: September 5, 2002