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HRSC Press Release #217 - Butterfly Crater (orbit 368)
Elliptical Impact Crater in Hesperia Planum
RGB Farbbild #1
On 5 May 2004 the High-Resolution Stereo Camera (HRSC) onboard the ESA spacecraft Mars Express obtained image data in orbit 368 with a ground resolution of approximately 16.7 metres per pixel. The data were acquired in the region of Hesperia Planum, at approximately 35.3° southern latitude and 118.7° eastern longitude.
A large elliptical impact crater is visible within the scene, measuring approximately 24.4 km long, 11.2 km wide and reaching a maximum depth of approximately 650 metres below the surrounding plains. Ejecta from this impact can be seen extending away from the crater, including two prominent lobes of material northwest and southeast of the crater.
The large circular feature, partly cut off by the border of the image, has a diameter of roughly 45 km. This appears to be an impact crater that was subsequently resurfaced by lava flows, preserving the outline of the underlying crater. The arcuate features visible in the north of the image, known as wrinkle ridges, are thought to have been caused by compressional tectonics.
While the majority of impact craters are relatively circular, the elliptical shape of this impact crater suggests a very low impact angle. The long axis of the impact crater is viewed as the impacting direction of the projectile. Similar elliptical craters are observed elsewhere on Mars, as well as on the earth's moon.
Rot-Cyan Anaglyphe #1
The colour scenes have been derived from the three HRSC-colour channels and the nadir channel. The perspective views have been calculated from the digital terrain model derived from the stereo channels. The anaglyph image was calculated from the nadir and one stereo channel. The black and white high resolution images were derived form the nadir channel which provides the highest detail of all channels.
The High Resolution Stereo Camera (HRSC) experiment on the ESA Mars Express Mission is led by the Principal Investigator (PI) Prof. Dr. Gerhard Neukum who also designed the camera technically. The science team of the experiment consists of 40 Co-Investigators from 33 institutions and 10 nations. The camera was developed at the German Aerospace Center (DLR) under the leadership of the PI G. Neukum and built in cooperation with industrial partners (EADS Astrium, Lewicki Microelectronic GmbH and Jena-Optronik GmbH). The experiment on Mars Express is operated by the DLR Institute of Planetary Research, through ESA/ESOC. The systematic processing of the HRSC image data is carried out at DLR. The scenes shown here were created by the PI-group at the Institute for Geological Sciences of the Freie Universitaet Berlin in cooperation with the German Aerospace Center (DLR), Institute of Planetary Research, Berlin.
hochaufgelöste Bilddaten / full resolution image data
|Kontextkarte (MOLA):||TIF (791.9 KBs) / JPG (354.9 KBs)|
|Nadiraufnahme:||TIF (12.7 MBs) / JPG (10.7 MBs)|
|RGB Farbbild #1:||TIF (53.4 MBs) / JPG (14 MBs)|
|Rot-Cyan Anaglyphe #1:||TIF (40.2 MBs) / JPG (12.8 MBs)|
|Perspektive #1:||TIF (43.8 MBs) / JPG (8.8 MBs)|
|Perspektive #2:||TIF (43.8 MBs) / JPG (8.1 MBs)|
|Perspektive #3:||TIF (48.8 MBs) / JPG (8.5 MBs)|