The weather was very good Tuesday night for observing a few planetary nebula with my 16" f/4.5 Dob from the FPOA Observatory on Fremont Peak last night, March 28, 2017. Temperature was in the 50°F range with no dew, 70%RH, and light occasional wind that didn't affect the seeing. The SQM by 10pm was 20.94. The seeing was very good at 1 arc-sec and transparency good for viewing my target objects positioned at -14°, -18°, -27° declination.I wanted to capture three small and medium size planetaries lying in Puppis before this winter time constellation disappears for another nine months. Manually located and observed were:
NGC 2438 Puppis; RA 07 41 Dec -14 44; mag 11; 73"x68".
Moderate size circular ring nebula, ghostly grey in appearance with slightly darker center. Nebula easily spotted at 100X. At 350X, ring appeared uneven in brightness. A faint field star positioned at nebula's dark center but not the central star. Northern side of ring appeared brighter. NPB and OIII narrowband filters similarly enhance nebula shape and ring uneveness.
NGC 2452 Puppis; RA 07 47 Dec -27 20; mag 12.2; 31"x24".
Smaller disk shaped nebula among many field stars, grey in color and spotted at 100X. At 350X, uneven in brightness with north and south ends being brighter.
NGC 2440 Puppis; RA 07 41 Dec -18 12; mag 9.4; 74"x42".
Nebula was easily located at 100X as a small grey hazy oval patch with brighter center. With 350X, much detail was seen within the core as two small bright knots (NW-SE orientation) connected by a "U" shaped bridge bending north-westward between the two. The elongated halo was finely extended at least 80 min in length. Use of NPB and OIII filters both enhanced the core area and halo.