NGC 6210 - The Tiny "Turtle" Nebula (Bill McLaughlin)

NGC 6210 - The Tiny "Turtle" Nebula

Located in Hercules, NGC 6210 is a very small (only 15 x 20 arc sec) but bright (mag. 8.4) planetary nebula. In the late 16th century it was originally identified as a star but Wilhelm von Struve realized it's nebulous nature in 1825 while he was searching for double stars. It is about 6000 light years distant. Imaging it with a reflector can be somewhat problematic since the nebula itself is small and bright enough to create diffuse diffraction spikes. It is very strong in O3 which is where the detail came from in the image. A paper on it's elemental makeup can be found at the link below. Imaged over 9 nights between February 24th and April 8th 2024 from SkiesAway Observatory. There was an element of lucky imaging involved since the frame reject rate was about 75% in order to get decent detail.

Makeup of NGC 6210

Final
Original
B

B

Title: NGC 6210 - The "Turtle" Nebula

Description: Located in Hercules, NGC 6210 is a small but bright (mag. 8.4) planetary nebula. In the late 16th century it was originally identified as a star but Wilhelm von Struve realized it's nebulous nature in 1825 while he
was searching for double stars. It is about 15 x 20 arc sec in size and about 6000 light years distant. Imaging it with a reflector can be somewhat problematic since the nebula itself is small and bright enough to create diffuse diffraction spikes. It is very strong in O3 which is where the detail came from in the image. A paper on it's elemental makeup can be found at the link below.

Imaged over 9 nights between February 24th and April 8th from SkiesAway Observatory

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Status	Advanced success
Started	...
Astrometry.net job	9756951
PixInsight job	C9VQYP11E5TDM4Y3OUN2ZX5OGVTBWD7E
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h44m31s.934
RA (top/left)	16h44m11s.343
RA (top/right)	16h44m11s.956
RA (bottom/right)	16h44m52s.515
RA (bottom/left)	16h44m51s.919

Dec (center)	+23°48′14″.37
Dec (top/left)	+23°52′22″.93
Dec (top/right)	+23°43′56″.92
Dec (bottom/right)	+23°44′05″.93
Dec (bottom/left)	+23°52′31″.49

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