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Only obvious or conspicuous candidates for planetary nebulae were
listed in this Category, and only six of the most interesting are
illustrated. A variety of forms, from low to high-surface-brightness
shells, with conspicuous to inconspicuous central stars, is
illustrated in the present photographs. On purely morphological
grounds, planetary nebulae are distinctive but not unique; there exist
some high-surface-brightness spirals and pure ring galaxies which
look very similar. Accordingly we have retained this Category which,
pending future spectroscope study, may yield some extragalactic
objects. Those planetaries already noted by
Perek and Kohoutek
(1967),
Kohoutek (1971),
Allen (1973),
van den Bergh et
al. (1973),
Longmore (1977) and
Longmore and Tritton
(1980)
were cross-compared, noted, and
left in our final listing to shed some light on our completeness limit
for rediscovering such objects. This Category of objects contribute
only slightly more than one percent to the total number of objects
catalogued by us. Recently, a further investigation of suspected
planetary nebulae has been completed by
Frederick and West (1983).
CATEGORY 25:
PLANETARY NEBULAE
AM 1322-372 picture
AM 0558-754 picture
AM 1718-270 not in NED/Vol I
AM 1412-531 picture
AM 0914-362 picture
AM 0906-694 picture