Clear again after 2 months!

Yesterday evening, a large break in the eternal cloud pack allowed at last some more imaging! Perfect for the first light of the ASI183MM and also the new guiding/planetary camera the ASI290MM.

During the imaging session, I could picture the setup before and after the streetlights were switched off…. Imagine the difference!

Lights still on
Nikon D750 30s 24mm iso800 F6dot7
Imaging in the plain light off a streetlight 30 meters from the scope… Nikon D750 30s 24mm iso800 F6.7
Streetlights switched off
Nikon D750 30s 24mm iso800 F6dot7
And a few seconds later the lights are switched off! Nikon D750 30s 24mm iso800 F6dot7 SQM values dropped a bit from 20,30 to 20,55
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The Pleiades again

Sleeping during a workweek is important! so this image was made unattended – counting on good luck. At the start of the session around midnight the sky was still covered with some high cirrus. At least the street lighting was already switched off.

Image data: Nikon 180mm tele F5.6, no filters, 82x180seconds or about 4 hours of data. It proves the IFN is also visible from light-polluted area’s without the use of filters.

M45 Nikon 180mm ED D750 83x180s no filter SQM 2030 66% St-avg-14292.0s-WC_1_3.0_none-x_1.0_LZ3-NS-full-StSh-add-sc_BWMV_nor-AAD-RL-noMBB_1stLNC_it3-mod-lpc-cbg v3

 

Continue reading “The Pleiades again”