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The Double Cluster in Perseus is perhaps known pre-historically. It was first catalogued in 130 B.C. by Hipparcus. Both clusters are quite young: hPersei is listed at 5.6 million years, while chiPersei at 3.2 million years.

They are approaching us at around 22km/sec.


January 21, 2009 10:10 PM

NGC 869                        NGC 884

2 : 19.0 (h:m)                  2 : 22.4 (h:m)

+57 : 09 (deg:m)             +57 : 07 (deg:m)

7.1 (kly)                           7.4 (kly)

4.3 (mag)                         4.4 (mag)

30 (arc min)                     30 (arc min)

                31971 (# Suns)

Right Ascension

Declination

Distance

Visual Brightness

Apparent Dimension

Luminosity

Pentax 125 SDP - Pentax 75 SDHF

Takahashi EM-200 Jr - Guided

Canon 40D Unmodded

Homestead, Florida

Equinox, PHD Guiding, Nebulosity

Nebulosity, Photoshop CS3

25 min with 3m subs @ ISO1600

The image presented below was completely acquired and processed on a Mac, under OSX

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