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
|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.|
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.