Van den Berg 93
aka Sh2-292, RCW 2, Gum 1, the head of the Seagull nebula
emission and reflexion nebula
20’ x 20’ in Monoceros
Date of observation:
14 déc. 2010 02:58 UT
Length of observation:
Alt: 30.1°, Az: 210.5°
V0/R10kmh t-4.6° hu56%
SQMZ 21.25(MW) SQML 21.11 (?!), FWMH 3.5″, mvl(UMi) 6.4 VI2, 6.6 VI4, T0.5 P1 S5/100 !
Observatoire des Baronnies Provençales (Southern French Alps)
TN 635 Dobson Obsession
Televue Panoptic 24mm / Deepsky filter
Although my SQM and SQML gave rather low values, the sky was remarquably transparent. Light pollution is totally absent from the Observatoire des Baronnies Provençales, overall excellent conditions to observe a large and faint target.
vdB 93 is an interesting nebula because of its dark lanes from each part of its lighting star. With patience, they can be analysed and sketched with a lot of details.
Numerous stars are scattered in the halo, which presents a beautiful light blue, enhanced by the Deepsky filter.
par Bertrand Laville