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Catalogue and alternative designations Longmore 18,ESO184-18


Type Planetary Nebula 
Position 19 09 47.82  -55 35
Constellation Telescopium
Camera and Telescope STLXL6303E and 36.8 cm Ritchey Chretien
Focal Ratio F9
Exposure Details HaOIIIOIIILRGB with Hydrogen alpha = 200 minutes, Oxygen III = 220 minutes, L = 80 minutes, Red = 60 minutes and Green = Blue = 30 minutes.
Description Longmore 18 was discovered by Andrew Longmore in 1977 whilst analysing photographic plates. It has a size of 88x80 arcseconds and consists of a classic structure of an outer Ha rim and an OIII interior. It was spectroscopically confirmed to be a true planetary nebula in 1985.

(description by Sakib Rasool)