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Last update: 2017-06-28

VdS FG

- Planetary Nebulas (Gem) -

And (1) Cep (8) Dra (2) Lep (1) Peg (2) Tau (1)
Aql (17) Cet (1) Eri (1) Lyn (1) Per (4) UMa (1)
Aqr (2) Cnc (1) Gem (3) Lyr (3) Pup (2) Vul (3)
Aur (1) Crv (1) Her (5) Mon (1) Sct (2)
Cam (1) Cyg (19) Hya (1) Oph (1) Sge (3)
Cas (5) Del (3) Lac (1) Ori (2) Sgr (3)

Abell 21 (PN)

DSS
© DSS II (red) - 15×15'
Name: Abell 21, PK205+14.1, Medusa Nebula
Type: PN
Constellation: Gem
Coordinates: 07h29m02.69s / +13°14'48.4"
Brightness / Size: v11.3 mag / 10.0×6.0'
8" f/6, 37x + [OIII], Bortle 4, NELM 6.0, SQM-L 20.9
SQM-L 20.6: Crescentic (similar to the 1/3 illuminated moon), evenly bright, diffuse. Still visible with direct vision. With UHC filter also evident with averted vision.
EASY

NGC2371 (PN)

DSS
© DSS II (blue) - 5×5'
Name: NGC2371, NGC2372, PK189+19.1, H2.316, H2.317, Peanut Nebula
Type: PN
Constellation: Gem
Coordinates: 07h25m34.68s / +29°29'26.4"
Brightness / Size: v11.3 mag / 1.0×1.0'
8" f/6, 150x, Bortle 4
At 37x well seen with averted vision as a small, oval brightening. At 150x I could see two roundish, well separated brightenings with direct vision. A UHC fitler increased contrast a bit, but with no more details.
EASY

NGC2392 (PN)

DSS
© DSS II (blue) - 5×5'
Name: NGC2392, PK197+17.1, H4.45, Eskimo Nebula, Clownface Nebula
Type: PN
Constellation: Gem
Coordinates: 07h29m10.77s / +20°54'42.5"
Brightness / Size: v9.9 mag / 0.9×0.9'
80mm f/6.25, 25x, Bortle 6, NELM 5.2
Barely seen with direct vision as very small, non-stellar brightening nearby an 8.24m star. At 62x an obvious, round disc.

EASY
8" f/6, 37x, Bortle 4, NELM 6.0
The quite bright central star is most evident with direct vision, whereas the nebula is evident with averted vision. Bright, round, nearly evenly bright. At 171x I felt that the nebula gets slightly brighter toward the middle. I didn't focus on the much fainter, outer region.
EASY