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Rosetta blog: Hello Hatmehit – CometWatch 18 January

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Posted January 26, 2015

Today’s CometWatch mosaic comprises images taken by Rosetta’s navigation camera (NAVCAM) on 18 January, from a distance of 28.4 km from the centre of Comet 67P/Churyumov-Gerasimenko. The image resolution is 2.4 m/pixel and the individual 1024 x 1024 frames measure 2.5 km across. The mosaic is slightly cropped and measures 3.7 x 4.0 km.

Four image mosaic comprising images taken on 18 January 2015 by Rosetta's Navigation Camera (NAVCAM). Rotation and translation of the comet during the imaging sequence make it difficult to create an accurate mosaic, and there may be some spurious spatial and intensity features as a result of the mosaic-making sequence, so always refer to the individual frames before performing any detailed comparison or drawing conclusions about any strange structures or low intensity extended emission. Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

Four image mosaic comprising images taken on 18 January 2015 by Rosetta's Navigation Camera (NAVCAM). Rotation and translation of the comet during the imaging sequence make it difficult to create an accurate mosaic, and there may be some spurious spatial and intensity features as a result of the mosaic-making sequence, so always refer to the individual frames before performing any detailed comparison or drawing conclusions about any strange structures or low intensity extended emission. Credits: ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

The mosaic focuses on the smaller of the comet’s two lobes, with the shallow, 1 km wide depression we now know to be called Hatmehit situated towards the top. Bordering Hatmehit are the Ma’at, Maftet and Bastet regions (refer to the maps here and here to get oriented with Comet 67P/C-G’s geography).

The flanks of the comet’s larger lobe can be seen in the background of this mosaic, while much of the foreground is dominated by shadow.

The four individual 1024 x 1024 frames, along with a montage of the frames, are provided below:

ESA_Rosetta__NAVCAM_20150118_montage

 

 

ESA_Rosetta_NAVCAM_20150118_D

ESA_Rosetta_NAVCAM_20150118_AESA_Rosetta_NAVCAM_20150118_BESA_Rosetta_NAVCAM_20150118_C

 

Source: Rosetta blog

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