I’ve finally finished processing all of the images from the January 16-18 weekend of comet Lovejoy, from the Cota 1000 site.
The following images are the results from the second night (Jan 17-18), acquired with the TS 65Q APO Refractor (65 mm diameter, 420 mm focal length) and Canon 550D with guiding via PHD software onto the NEQ6 mount.
The base result is a stack of 15 frames at ISO 800 and 1600, and exposures of 4 minutes.
While trying to get the best out of the images, I’ve ended up with a few versions of the original image, some which present perhaps better the tail details. The sequence below shows the following:
-the final version of the image in colors, with stars;
-the same image but a little over-exposed, in black-and-white;
-the same as the previous, but inverted to better see the tail;
-a specially processed image to get the best out of the tail details, with no stars;
-the same as the previous, but inverted, again to better see the details in the tail.
And a small mosaic, out of 5 frames at ISO 800 and 5 minutes exposure for each panel, showing the extent of the tail:
The comet is very dynamic still, but since the weather these days is not cooperating, I can only watch the evolution of the comet’s tail on the Internet…
Hope I’ll get another personal view of Lovejoy soon.