Chi Persei

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Chi Persei

(kÿ per -see-ÿ) (χ Per) See h and Chi Persei.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
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Caption: The star field around NGC 869 and NGC 884, the Double Cluster, was tack-sharp when using field-flatteners.
The cluster is also known by its NGC catalogue number NGC 869 and NGC 884.
Binocular targets include the double cluster in Perseus NGC 884 and NGC 869.
The famed Double Cluster in Perseus (NGC 869 and NGC 884) is a terrific two-in-one example.
Our next stop probably needs no introduction: Sweep 11[degrees] northwest of Alpha Persei to find the famous Double Cluster, NGC 869 and NGC 884 (Stop 2), one of the finest binocular sights in the entire sky.
The Double Cluster (also known individually as NGC 884 and 869) lies in the rich stretch of Milky Way between the constellations Perseus and Cassiopeia--appropriate when you keep in mind that the groupings are inside the Milky Way Galaxy and about 7,400 light-years from us.
Another step of similar length carries us out to the Double Cluster in Perseus, composed of NGC 869 and NGC 884. At a little more than 7,000 light-years away, the Double Cluster is significantly closer to the edge of the Milky Way Galaxy than we are; it resides in the Perseus Arm rather than our own Orion Spur.
Seen through binoculars, the left cluster, NGC 884, lies 8.1 light-years away from us.
Visualizing Star Clusters Distance Size Cluster Type (l-y) (l-y) Pleiades (M45) Open 440 14 Wild Duck (M11) Open 6,000 24 NGC 869 Open 7,100 62 NGC 884 Open 7,400 65 Messier 28 Globular 18,300 59 Hercules (M13) Globular 25,100 146 Messier 3 Globular 33,900 177 Apparent Mag.
NGC 884 has more of these orange stars than 869 to its west.
The superb Double Cluster (NGC 869 and NGC 884), also barely visible without optical aid, is a truly spectacular sight in low-power telescopes.
The Double Cluster, h and [Chi] Persei (NGC 869 and NGC 884), lies at the heart of this blazing section of the Perseus OB stellar association.