||Planetary Nebula Sh2-188 / Simiez 22
||Ra 01h 31m 37s Dec +58° 26’52° (current)
|Size & Distance:
||10.0 x 3.0 Apx 2800 light years.
|Date & Location:
||07-20/21-2012 Palomar Mountain, CA.
||Hubble Palette SHO, Sll=R, Ha=G, Olll=B, 14 ea. @ 15min (bin 1x1) 10:30 total.
||Telescope Engineering Company APO160FL @ f/7.2 F/L 1152mm.
||Astro-Physics 900 GTO / ATS 10x36 pier.
||SBIG-ST10XME @-10c / Guided by TV60APO / w SBIG-RGH
||Astrodon 3nm Ha, Sll, Olll
||MaxImDL 4.56, Photoshop CS5
||Sky conditions: Average seeing, Light wind, Mid 75’s
Cropped Image Field of view is 22.7 x 25.4 arcmin.
This image was an Astronomy Magazine Picture Of The Day, Aug, 2012
Sh2-188 is an unusual planetary nebula located in Cassiopeia. The expanding gas is colliding with ambient gas in the interstellar medium. The nebula is nearly circular in shape but is much brighter in the upper right because the central star is moving rapidly in that direction.
It was discovered at the Simiez observatory in Russia in 1951