Sh2-239 (LBN 821) Bright Nebula in Taurus

Located at: RA 04 hours 31 minutes 21 seconds, Dec +18 degrees 07 minutes 00 seconds

Size: 5.3' x 2.5' Magnitude: -- Class: Emission (Sharpless) 3 2 2

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -15c, -20c & -25c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 980 minutes (98 x 10 minute subs), 12/22/23/24/26/28/2013; seeing 3.4-5.5 FWHM per CCDStack

Processing:

CCDStack 2.75.4973.15338, Photoshop CS5.1

Location:

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

Notes: Still being bothered by breezy off-shore winds that are more of a problem for the 14.5" than they were for the 8". This is my third stab at processing this sequence, as there were night to night variations in sky conditions that made a difficult background gradient. See first attempt ... See second attempt

The bright nebula Sh2-239 is about 9 minutes SSW from the center of Dark Nebula LDN 1551. See the 8" version. See here for a 14.5" f5 Kodak Tech Pan 2415 film image