Drogenberg Archives - DROGENBERG

3rd March 201910th March 2019

Leo Triplet / Esprit 120 F7 / Nikon D750

Leo_Triplet 24039 seconds or _6h40m_Nikon_D750_800ISO_Esprit120_F7_V1 66% JPG Nights of 24-25-26 February 2019 The start of the todal stream of NGC3628 is visible.

1st March 20191st March 2019

Seeking the resolution limits of the Esprit

The Eskimo Nebula in Gemini is a very small object. It’s comparable to Jupiter in apparent size. It’s also a lot dimmer then Jupiter so longer exposures are required. The ASI184mmPro has small pixels (smaller then the ASI290) and could, when seeing allows, bring out the finest details. The diameter of the planetary nebula is 48″ !!! Here is my attempt from last Monday:

400x4s Luminance, 140x8s Green, Blue and Red by Gain =333 No Guiding

27th February 201927th February 2019

An intermediate NGC3628

This galaxy is the third member of the Leo triplet. During the last nights I could image this with the Esprit120mm and the ASI183MM Pro. This intermediate result is L-filter 6hr36m of data processed in APP and cropped. Best seen by clicking on the image!

*NGC3628 ASI183mm Pro + Esprit 120mm + SW Flattener + No Reducer, No Filter*

And below is the equivalent image taken with the Nikon D750 DSLR. I had a lot of noise in this 3hrs picture (36x300s), I suspect something went wrong with the dithering. The tidal stream is just visible.