Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6 (Boris US5WU)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: PGC 2797165 · PK136+04.1 · PK136+05.1

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Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

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Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6 - two planetary nebulae among the clouds of hydrogen in the constellation Cassiopeia.

HFG 1 (also known as PK 136+05) is visible in my image in the upper left corner. HFG 1 is a large 8.3 arcminute faint evolved planetary nebula that was discovered in 1982 by Joy Heckathorn, Robert Fesen and Theodore Gull. In 2009, a massive trail of emission was discovered, which is caused by the planetary nebula moving through space and interacting with the interstellar medium. Another indicator of its motion through space and another product of its interaction with the ISM is a mainly OIII bowshock with a size of 15 arcminutes. Another structure associated with this planetary nebula is a Ha low ionisation structure embedded in the central shell. This planetary nebula also has a binary central star called V664 Cassiopeiae. The two stars are very close and rotate about each other in just 14 hours.
Abell 6 (PK 136+04.1) is a planetary nebula (with size about 3 arcminutes and magnitude of about 15m) in the bottom right corner of my image which is the smaller round bubble-like structure with a brighter wall. This nebula dicovered by George Abell in 1955.

This image taken over several nights in January-March 2021.

Planetary Nebulae
Abell Planetary Nebula
Sony 694 Images
Schmidt-Cassegrain Telescope (SCT) Imagers

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Status	Advanced success
Started	...
Astrometry.net job	5690414
PixInsight job	PAYZ459C2Q3RZAGPZAXERVZUPUAB94N8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h01m35s.77
RA (top/left)	03h05m10s.21
RA (top/right)	02h57m45s.14
RA (bottom/right)	02h58m05s.83
RA (bottom/left)	03h05m20s.13

Dec (center)	+64°45′12″.7
Dec (top/left)	+65°04′58″.6
Dec (top/right)	+65°02′56″.6
Dec (bottom/right)	+64°25′08″.6
Dec (bottom/left)	+64°27′13″.3

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Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

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Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

Heckathorn-Fesen-Gull 1 (HFG 1) and Abell 6

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