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| Catalogue and alternative designations |
Abell42 |
| Type | Planetary Nebula |
| Position | 17 31 29, -08 19 10 |
| Constellation | Ophiuchus |
| Camera and Telescope | STXL6303E and 36.8 cm Ritchey Chretien |
| Focal Ratio | F9 |
| Exposure Details | This is a bi-colour image (HaOIIIOIII) with exposures through 3nm Astrodon filters binned 2x2. Hydrogen alpha = 495 minutes and OIII = 405 minutes |
| Description | Abell
42 is one of the fainter members
of the Abell planetary nebula
catalogue. The apparent
magnitude is 16.5 and the
central star magnitude is
20.3. The size is 60"
x 57" for the central shell
and the outer halo has an
approximate size of 2.5
arc-minutes.
The outer halo around this planetary nebula was discovered by the Galactic Planetary Nebula Halo Survey (GPNHS) team in March 2015.
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