Object of the Season
The Webb Deep-Sky Society requested observations for the following deep-sky objects. Findings are published in the Deep Sky Observer (DSO).
Observations should be sent to Wolfgang Steinicke , Gottenheimerstr. 18, D-79224 Umkirch, Germany.
Object of the Season (Winter 2016)
Planetary Nebula Abell 21 in Gemini
This is the famous “Medusa Nebula” – a real challenge for visual observers (use an OIII filter). The large planetary nebula is located at the border of Gemini and Canis Minor. George Abell discovered the object in 1955. It is an old example of its class. The central star (WD 0726+133) is a faint blue object.
Results of the observations of Abell 21 will be published in DSO 176.
- Abell 21
- Position (2000)
- 07 29 02.7 +13 14 48.0 (Gem)
- Planetary Nebula
- 12' (4 ly)
- 1,500 ly
- Other Designations
- PK 205+14.1, Sh 2-274, YM 29, ARO 388
Wolfgang Steinicke - Nebulae and Clusters Section Director
Previous Objects of the Season
Object of the Season 2016
Object of the Season 2015
Object of the Season 2014