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December 2017: Sharpless 2-240

This is a HUGE object. So it doesn’t fit into my FOV and would need a mosaic. Maybe I’ll try the mosaic, but I’ll need a moonless night to avoid gradients (which easily spoil the mosaic work).

For this image, I used H-alpha to overcome the moonlight, As it is also a weak object, I exposed 1,000-second subs. Then I took some RBG subs just to color the final image. I processed using the synthetic-R method.

Sharpless 240 signedGo to this object description and this image technical detail.


December 2017: Rosette revisited

This time with long H-alpha exposures. Tne Moon was almost full, but the H-alpha filter worked excepcionally well, showing little gradient.

I tested 1,000-second long exposures, instead of the 600’s that I was used to. It worked ok, with a very good guiding done by the DSI Pro.

This is the final H-alpha image (stacking of 6):

Rosette H-alpha signed

I combined this image with old RGB subs taken a year ago and that had too much noise. Teh result, I think, is wonderful (I used the H-alpha as a R component).

Rosette HGB (6X100, 4X300) signed

Go to this object description and this image technical detail.


August 2018: the great American solar eclipse

On August 21st, 2017 the Moon hided the solar disk in what was known as the great American solar eclipse. The totality run from the west coast, in Oregon, to the east.

With my family we observed this wonderful event from Madras, Oregon. I imaged it with a Canon 70D with a 300mm zoom.

This is the totality, in a HDR composition (HDR combines different exposures so as to gather details of the inner and external corona):

eclipsi HDR_crop_neta_ajustada signada

Just before, and after, the totality what is known as the diamond ring appears. Notice the pearls in this picture, a second before the Moon disk hides the Sun:

eclipsi perles signat

And this was an amazing final diamond ring:

eclipsi diamond ring signat

Go to this object description and this image technical detail.