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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)
|