NGC 6309 (PK 9+14.1) Planetary Nebula in Ophiuchus   

Located at: RA 17 hours 14 minutes 05 seconds, Dec -12 degrees 54 minutes 41 seconds

Size: 16" Magnitude: 10.8 photographic Class: 3b+6

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, 112.5 minutes (75 x 1.5 minute {90 seconds} subs), 07/14/2015; seeing 2.1-3.9 FWHM per CCDStack

Processing:

CCDStack 2.90.5589.16047, Photoshop CS5.1

Location:

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

Notes:

Another high surface brightness planetary on a rare clear night during monsoon clouds. Once again, my exposure time for detail in the 'body' of the planetary does not pick up the the faint "wings" seen in the CDS image/data.

View 200% crop.

From the NGC/IC Project:

Contemporary Visual Observation(s) for NGC 6309
NGC 6309 = PK 9+14.1 = Box Nebula = PN G009.6+14.8
17 14 04.2 -12 54 39
V = 11.5;  Size 52"

17.5" (6/30/00): at 280x using a UHC filter this bright but compact PN was 
elongated 2:1 in the direction of a mag 12 at the NNW edge, ~25"x12".  There is 
a large, bright lobe or condensation at the north end with a smaller, fainter 
knot at the SSE end.  At moments the lobes appear completely "resolved" with a 
darker gap in the center.  The view at 500x was excellent!  The fainter southern 
lobe appears elongated and slightly offset from the major axis of the PN.  The 
lobes are bisected by a darker lane oriented SW-NE and oblique to the minor 
axis.  The brighter knot at the north end has a mottled appearance and irregular 
shape.

13": moderately bright, small, elongated NNW-SSE.  A mag 12 star is at the NNW 
edge 20" from the center.  Appears slightly brighter or a condensation is at the 
SSE end.

- by Steve Gottlieb