Celestial hemisphere:  Northern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  PK036+17.1
Abell 43, Eddie Bagwell
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Abell 43

Abell 43, Eddie Bagwell
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Abell 43

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Description

Abell 43 (PK36+17.1) is a planetary nebula in OPH. It has a special type of central, pulsating star called PG 1159. These stars are hydrogen-deficient and on their way to the white dwarf cooling sequence. However, a fraction of them shows small amounts of atmospheric hydrogen, and are referred to as hybrid PG 1159 stars, which is the case here. Both types may be at the center of planetary nebula where a nebula surrounds the star. A similar hybrid PG 1159 star exists in NGC 7094 where the nebular structure is similar to Abell 43 with interlacing filaments.

For some reason I thought Abell 43 was going to be a little bigger from looking at other images on Astrobin. When the subs were coming in, I couldn't believe how small it was. I didn't have a lot of faith that my "little" ES127 could deliver an acceptable image. Sometimes it's good to be wrong. Not as good as the bigger scopes, but I'm pleased with how the final image turned out.

Version B is a wider field.
Processed in HOO.

Thanks, Eddie

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