Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  PK128-04.1  ·  Sh2-188
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Sh2-188, Dionysus
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Sh2-188

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Sh2-188, Dionysus
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Sh2-188

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Description

Sh2-188 (also known as the Dolphin Nebula or Shrimp Nebula) is an unusual planetary nebula in the galactic disk, approximately 850 light-years away from Earth in the northern constellation of Cassiopeia. The expanding gas from Sh2-188 has a nearly circular shape, but is much brighter to the southeast (lower left). This is because the rapidly moving central star – at about 125km/s – is s creating a bow shock in that direction in the surrounding interstellar medium. Faint wisps of gas can also be seen in the opposite direction, which will eventually dissipate away. Sh2-188 is considered to be one of the best examples of interaction between a planetary nebula with the interstellar medium.

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Sh2-188, Dionysus

In these public groups

Rarely Imaged Small DSOs