NGC7293. The Helix Nebula
Planetary Nebula in Aquarius
It is one of the closest planetary nebulas, and it is the one with the largest apparent size, 16 arcminutes (its halo goes to 28 arcminutes). Although it is pretty bright, as its light covers a wide area, its visual observation becomes difficult.
Distance to Earth: 
550 light years.
Visual magnitude:

Date and location 28-ago-2005. Caraquiz, Madrid
Telescope Megrez II 80ED, f=560mm. Autoguíde with Toucam and LX200GPS
Camera Artemis285. IDAS LPS Hutech filter, with IR cut
Image processing
L: 6x300s; H-alfa: 3x300s; RGB:2x300s. Images stacked and RGB composition with AIP4WIN.  LRGB  with Adobe Photoshop. Filter with Pixinsight

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