NGC 2371 / NGC 2372* (PK 189+19.1) Planetary Nebula in Gemini

Located at: RA 07 hours 25 minutes 35 seconds, Dec +29 degrees 29 minutes 22 seconds

Size: 55" Magnitude: 13.0 photographic Class: 3a+2

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter,  800 minutes (80 x 10 minute subs), 01/23/27 & 02/4/6/2015; seeing 2.2-4.5 FWHM per CCDStack

Processing:

CCDStack 2.86.5496.24001, Photoshop CS5.1

Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes: * Have to move on from this interesting object, as online images show a pronounced blue color (not a great target with a red filter), which more time will not improve much. During the time the full moon was too near NGC 2371 to image, I turned to other parts of the sky to image J 320 and NGC 1156.

First night was windy (with poor seeing), and the next was calm, but with more moon (60% ~ 61 degrees away), third night had lots of light cirrus. Only the fourth night was reasonably good (seeing, transparency), but had a 90% illuminated moon rising about 63 degrees underneath the object. Used the 'best' 80 out of 106 subs.

View 200% crop.

From the NGC/IC Project:

Contemporary Visual Observation(s) for NGC 2371
NGC 2371 = PK 189+19.1 = PN G189.1+19.8
07 25 33.8 +29 29 18
V = 11.2;  Size 74"x54"

17.5" (2/14/99): very unusual appearance at 380x with two bright knots oriented 
SW-NE about 30" between centers.  The SW knot is 15"-20" in size, slightly 
elongated and the brighter of the two.  The NE condensation has a slightly lower 
surface brightness and appears ~20" in diameter.  Symmetrically placed between 
the knots is a faint 14.9 magnitude central star.  Weaker nebulosity connects 
the two knots giving a dogbone appearance and a very faint rounder halo encases 
the structure!

17.5": unusual planetary, bright, moderately large, elongated SW-NE.  Two bright 
knots are at both ends (with two NGC designations) although the SW end is 
brighter and concentrated.

13": two condensations in halo.  The WSW side is brighter and sharper.

- by Steve Gottlieb

* The NGC/IC Project indicates that NGC 2372 is the northeastern (top) half, and NGC 2371 is the southwestern (bottom) half.