The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest star). The remarkable shape of the nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico. It is sometimes incorrectly called the “North American Nebula”.[3]

（quote from Wikipedia）

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Date and Place 2015-05-24 Hoshino, Tochigi
Scope Takahashi Epsilon180ED + BetaSGR Focuser
Mount Celestron CGEM
Camera Atik383L+
-20[deg-c]
Auto guiding Off-axis Superstar + GPUSB
Filter Astrodon Tru-balance Gen.2 LRGB Filter 36[mm] Unmounted
Exposure L : 17x 600[s]
R : 3x 300[s], G : 7x 300[s], B : 7x 300[s]
Total : 255[min]
Software Astroart5 SP3 with SHS Version 4.0 beta 1
PHD Guiding 2.3.1
Sky Safari Pro 4.0.5
Stella Image 6Photoshop

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