Object: Planetary nebula ABELL 21               Constell: GEM

RA: 07h 29m             Decl: +13° 14.8'        Epoch: 2000
Mag: 10.3m (v) ?        Size: 10'x6'            Type: 3 3 3
                                              (Sharpless-type) 

Observer: Jere Kahanpää
Obs. place: Hartola - Finland
Date/Time: 25./26.2.1995, 22.50

Telescope: N 205/1000
Magn: 40x               Filter: O-III
Field: 83'              NE Lim.mag: 5.8m
Background sky: 2       Seeing: 3
Weather: -6 °C, no moon, some ice mist

Brightness: 4           Alt: 40°
Description:   Huge (for a planetary)! Almost round with some
ring structure. Barely visible without the O-III filter but
bright with it (almost Br 3). Three clearly brighter parts: the
SW brightening is biggest and easiest. The NW side is very
diffuse.