Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)
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Hartl-Dengel-Weinberger 2, Maciej
Hartl-Dengel-Weinberger 2
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Hartl-Dengel-Weinberger 2

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Hartl-Dengel-Weinberger 2, Maciej
Hartl-Dengel-Weinberger 2
Powered byPixInsight

Hartl-Dengel-Weinberger 2

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Description

This nebula was first discovered by astronomer Stewart Sharpless in 1959, who included it in his catalog of HII regions as Sh2-200.
In 1983, Sh2-200 was included in the HDW catalog of possible planetary nebulae by astronomers Herbert Hartl, Johann Dengel, and Ronald Weinberger. In 1987, narrowband observations by Herbert Hartl and Ronald Weinberger detected large faint outer halo extending further than the central shell. However, it was not actually confirmed to be a planetary nebula until 2017, when its spectra were examined by professional observation.
Other desdination: PNG 138.1 + 04.1

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    Hartl-Dengel-Weinberger 2, Maciej
    Original
  • Final
    Hartl-Dengel-Weinberger 2, Maciej
    B

B

Description: Some colour corrections

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Hartl-Dengel-Weinberger 2, Maciej