Target: IC1396 - Elephant Trunk Nebula
Orion 8" f/4.9
Multi-Purpose Coma Corrector
JMI EV-1n Focuser
Resurfaced: Spectrum Coatings Max "R" (EAL)
Camera: Canon 40D (modified, cooled to 36F)
Filter: IDAS LPS
Ha: 16x600s (2.6h) @ ISO1600
Framing: North is Right
Location: Mocksville, NC
Ambient Temp: 70F
Camera Temp: 36F
Start Time: 10:15PM
End Time: 1:00AM
Captured with Nebulosity, stacked using DeepSkyStacker, processed in Photoshop.
The Elephant's Trunk nebula
is a concentration of interstellar
gas and dust in the star cluster IC 1396
– an ionized gas region located in the constellation Cepheus
about 2,400 light years
away from Earth.
The piece of the nebula
shown here is the dark, dense globule IC 1396A; it is commonly called the Elephant's Trunk nebula because of its appearance at visible light wavelengths, where there is a dark patch with a bright, sinuous rim. The bright rim is the surface of the dense cloud that is being illuminated and ionized by a very bright, massive star that is just to the west of IC 1396A. (In the Figure above, the massive star is just to the left of the edge of the image.) The entire IC 1396 region is ionized by the massive star, except for dense globules that can protect themselves from the star's harsh ultraviolet rays.