The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188) (DoubleStarPhotography)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 34 Cas · 34 phi Cas · LBN 633 · NGC 436 · NGC 457 · Owl Cluster · PGC 137635 · PGC 137653 · PGC 137658 · PGC 137671 · PGC 137675 · PGC 137676 · PGC 137688 · PGC 137696 · PGC 137700 · PGC 137701 · PGC 137703 · PGC 137705 · PGC 137720 · PGC 137728 · PGC 137730 · PGC 137734 · PGC 137741 · PGC 137745 · PGC 137746 · PGC 137752 · PGC 137769 · PGC 137818 · PGC 137845 · PGC 137847 · And 45 more.

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The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

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The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

A magnificent perched owl watches silently as a colorful shrimp darts across the night sky.

Caldwell 13, or NGC 457, is a beautiful open star cluster in the constellation Cassiopeia that's also known as the Owl Cluster. The Owl Cluster is located ~7,900 lightyears away, and is thought to have formed about 20 million years ago.

SH2-188, also known as the shrimp nebula, is a unique planetary nebula also located in the constellation Cassiopeia. Initially thought to be a supernova remnant in part due to its asymmetric crescent-like shape, this obect was later determined to be a planetary nebula(PN). Unlike SH2-188, however, most planetary nebulae have a symmetric shell that expands outward from its dying star creating a bowshock that encircles it. In the case of SH2-188 however, it is thought to moving rapidly through space causing the PN to interact with the interstellar medium. As a result of this interaction, the bow shock is preserved in the direction of forward motion, but the leeward end of the PN essentially drags behind, and eventually dissipates into space.

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Title: Slight change to color balance

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Status	Advanced success
Started	...
Astrometry.net job	8724787
PixInsight job	HT1ZSCF8RXJ3EZILB0WIG15FCUUWSFQ3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h24m29s.50
RA (top/left)	01h17m42s.74
RA (top/right)	01h35m50s.11
RA (bottom/right)	01h31m46s.37
RA (bottom/left)	01h12m55s.25

Dec (center)	+58°33′21″.7
Dec (top/left)	+57°18′19″.2
Dec (top/right)	+58°09′07″.7
Dec (bottom/right)	+59°46′56″.6
Dec (bottom/left)	+58°53′42″.5

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The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

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The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

The Owl (Caldwell 13 / NGC 457) and the Shrimp (SH2-188)

Revision title: Slight change to color balance

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