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LONGMORE 3 (AKA WRAY 17 -1)

PLANETARY NEBULA IN PUPPIS  (THE POOP DECK)

(Image centered at: ra 07 h:15 m / dec - 46º 59')

CLICK THE IMAGE FOR A HIGH RESOLUTION VIEW

November - 2024, Home Backyard in Martinez, Buenos Aires, Argentina

DATA

TYPE: Emission Nebula Region

APPARENT DIAMETER: less than 1,4 arc minutes

APPARENT MAGNITUDE (V): n/a

DISTANCE: 10.800 light years (3300 parsecs)

IMAGE INFORMATION

INSTRUMENT: 6" ORION OPTICS UK (Ultra Grade Optics) w/Sky Watcher Coma Corrector (0.9x) working at at f4.5

CAMERA: QHY 183 MONO

MOUNT: VIXEN GDPX, OAG with Starlight Xpress Lodestar

FILTERS: BAADER LRGB Set & ANTLIA O3 & HA 3nm

SKY CONDITIONS: urban skies - Bortle 8

EXPOSURES: LHAO3RGB (45,70,80,45,45,45)

OBJECT DESCRIPTION AND IMAGE SESSION

Longmore 3 is one of the first Planetary Nebula (PN) that shows up in southern constellation of Puppis in the spring/summer season. It is relative large for my set up and it has a strong emission in the O3 light frequency. There are just a few color images of this Planetary which is also known as Wray 17-1. The object has a complex morphology, almost round and it has some faint outer arms which are barely visible in the image. The center of the nebula contains some HII emission component that showed up easily during the pre-processing. 

There is a faint reddish emission background in the sky background which is part of bigger Gum 12. The nebula is located 6 arc minutes from magnitude 5.7 PR Puppis; also visible at the upper left QW Puppis shining at magnitude 4.4. t