Double cluster in Perseus '23 (framoro)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 7 Per) · 7 chi Per · Double cluster · HD13659 · HD13841 · HD13854 · HD13890 · HD13910 · HD13969 · HD14052 · HD14053 · HD14134 · HD14143 · HD14210 · HD14250 · HD14270 · HD14330 · HD14357 · HD14433 · HD14434 · HD14443 · HD14476 · HD14488 · HD14535 · HD14542 · HD14580 · HD14581 · HD14826 · Misam · NGC 869 · And 4 more.

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Double cluster in Perseus '23

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Double cluster in Perseus '23

The "Double cluster of Perseus" is made up of a pair of open clusters: h + χ Persei or NGC 884 and NGC 869 and was described as early as 130 BC by the greek astronomer Hipparcus. The fact that they are so clearly visible even from a great distance (our solar system is about 7000 LY from them) is an indication of a great real brightness, as well as their size, estimated around 70 LY in diameter for both objects. NGC 869 is mag 5.3 and contains about 200 stars, while NGC 884 is mag 6.1 contains about 120 stars. Both clusters are surrounded with a very extensive halo of stars that leads the overall mass of the complex to over 20000 solar masses. This couple of clusters forms the core of the Perseus OB1 association of young hot stars. They are external to the galactic plane and were born from the same giant cloud of gas, but still internal to the Milky Way. They sit in the Arm of Perseus, an outermost spiral branch of our Galaxy and immediately following the Arm of Orion (where our solar system resides). Both are young clusters, aged between 3 and 6 million years, and distant from each other about 800 LY.

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Status	Advanced success
Started	...
Astrometry.net job	8663159
PixInsight job	R0H4ZNOWXRB95TYB8CSHVHH9J9M0JM43
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h20m26s.646
RA (top/left)	02h14m55s.103
RA (top/right)	02h24m56s.796
RA (bottom/right)	02h26m04s.577
RA (bottom/left)	02h15m48s.535

Dec (center)	+57°08′45″.99
Dec (top/left)	+56°47′21″.46
Dec (top/right)	+56°34′59″.99
Dec (bottom/right)	+57°29′17″.83
Dec (bottom/left)	+57°41′55″.76

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Double cluster in Perseus '23

Double cluster in Perseus '23

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Double cluster in Perseus '23

Double cluster in Perseus '23

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