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Last update: 2017-07-26

VdS FG

- Bright Nebulas (CMa) -

Aur (7) Cep (10) Gem (1) Per (4) Tau (6)
Cam (2) CMa (1) Mon (3) Ser (1) Tri (4)
Cas (8) Cyg (11) Ori (14) Sgr (2) Vul (2)

NGC2359 (BN)

DSS
© DSS II (red) - 20×20'
Name: NGC2359, H5.21, Thor's Helmet, Duck Nebula
Type: BN, EN
Constellation: CMa
Coordinates: 07h18m30.00s / -13°13'42.0"
Brightness / Size: v11.4 mag / 10.0×5.0'
Wolf-Rayet ring nebula.

4.5" f/8, 28x + [OIII], NELM 5.0+
SQM-L 18.7, NELM 4.0, Moon (60% illuminated): Fairly well visible with averted vision, elongated, evenly bright. Brighter than expected. Also perceptible with UHC filter, but appeared obviously fainter.

MODERATE
8" f/6, 37x + [OIII], Bortle 4+, NELM 6.0+, SQM-L 21.1
NELM 5.0+, SQM-L 20.2: Without filter elongated, fairly faint. With UHC or [OIII] filter visible with direct vision, evident with averted vision, elongated (N-S). At the southern edge a bright extension towards SW. Otherwise evenly bright. [HBeta] without any effect.
EASY