Eskimo Nebula

Eskimo Nebula (NGC 2392) - Dave Samuels

Acquisition Date : 03/26/2005, Fremont Peak, California
Camera : Canon 20D unmodified
about 48 degrees F
Camera Settings : 15 x 30sec 1600ISO unguided
Flats, Darks median combined in IP.
No in-camera noise reduction
Mirror lock off
Telescope : 30" f/ 4.8 FL = 3658mm Newtonian
Mount : English cross-axis equatorial mount
unguided
Adapter / Prime / Afocal / Other : Prime
North is up, West is to the right
Processing Package / Processing Applied : Manually focused using diffraction spike focusing as an aid (as seen with the two brightest stars in this image). Captured using dslrfocus. Images Plus for calibrate/align/stack averaged. Then ImagesPlus star reduction. PS unsharp mask, levels.
Web Site : www.davesamuels.com
NOTES : In 1787, astronomer William Herschel discovered the Eskimo Nebula. From the ground, NGC 2392 resembles a person's head surrounded by a parka hood. In 2000, just after being fixed, the Hubble Space Telescope imaged the Eskimo Nebula. From space, the nebula displays gas clouds so complex they are not fully understood.

The Eskimo Nebula is clearly a planetary nebula, and the gas composed the outer layers of a Sun-like star only 10,000 years ago. The inner filaments are being ejected by strong wind of particles from the central star. The outer disk contains unusual light-year long filaments.

The Eskimo Nebula lies about 5000 light-years away and is visible with a small telescope in the constellation of Gemini about 4 degrees ESE of delta Gem that marks the body of Castor, the elder brother of the twins. NGC2392 / Planetary Nebula, type IIIb+IV R.A. 07h 29m 12.0s (2000.0) Dec. +20 55' 00" (2000.0) Apparent Size 47 x 43" Real Size 0.31 x 0.28 light yrs. Magnitude 8.3 (central star: mag 11) Distance 1360 light yrs.