Posted on 04/09/2014 by emily
CometWatch – 2 September
Four-image NAVCAM montage comprising images taken on 2 September from a distance of 56 km from comet 67P/C-G. Pay particular attention to the neck region for a closer view of the activity presented in OSIRIS images last month.
As described in previous blog posts NAVCAM image sequences are now being taken as small 2 x 2 rasters, such that roughly one quarter of the comet is seen in the corner of each of the four images. The four images are taken over an approximately 20 minute period, meaning that there is some motion of the spacecraft and rotation of the comet between the images.
The four images are shown separated by black borders and there is some overlap between adjacent frames, so that some features appear in more than one image. The images have been cleaned to remove the more obvious bad ‘pixel pairs’ and cosmic ray artefacts, intensities have been scaled to show a wide range of features, and the montage has been cropped to remove most of the black space around the comet. The dark feature in the centre is an imaging artefact.
Thank you to those of you who produced and shared your excellent mosaics using images from the CometWatch update posted on 1 September; we hope you enjoy mosaicking the images in this release, too (posted below as individual JPEGs of the four 1024 x 1024 pixel full-frame ‘corners’). As before, you are welcome to post them on your personal profiles with the ESA/Rosetta/NAVCAM credit line, and share a link to your work in the comments box below, so that we have the possibility to follow up with you and eventually post your efforts on this blog.
More images next week!