File:GRALS binary asteroid testing ESA397377.jpg
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DescriptionGRALS binary asteroid testing ESA397377.jpg |
English: The smaller model asteroid seen here atop a rover that slowly wheels around another larger model asteroid, a practical recreation of the kind of binary asteroid system to be visited by ESA’s proposed Hera mission.
The camera seen to the right, mounted on a 33 m track, approaches this miniature binary asteroid system to test vision-based navigation software. Employing 3D printed asteroid models, this test took place in ESA's GNC Rendezvous, Approach and Landing Simulator, or GRALS. “ESA’sHera mission, currently under study, would be humankind’s first mission to a binary asteroid system, targeting the Didymos pair of Near-Earth asteroids,” explains Paolo Martino, Hera system engineer. “The plan is to map surface features of these bodies on an automated basis to pinpoint Hera’s position in space and chart its onward trajectory. And GRALS is letting us test candidate navigation algorithms in a real-world way.” Part of the Agency's Orbital Robotics and Guidance, Navigation and Control Laboratory in its ESTEC technical centre in the Netherlands,GRALS is used to simulate close approach to uncooperative targets such as asteroids or drifting satellites. |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2018/07/GRALS_binary_asteroid_testing |
Author | European Space Agency |
Permission (Reusing this file) |
ESA–G. Porter,CC BY-SA 3.0 IGO |
Title InfoField | GRALS binary asteroid testing |
Set InfoField | Technology image of the week |
Camera location | 52° 13′ 10.69″ N, 4° 25′ 10.96″ E | View this and other nearby images on: OpenStreetMap | 52.219636; 4.419711 |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:04, 13 September 2018 | 6,742 × 4,495 (7.61 MB) | Fæ (talk | contribs) | European Space Agency, Id 397377, http://www.esa.int/spaceinimages/Images/2018/07/GRALS_binary_asteroid_testing, User:Fæ/Project_list/ESA |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D850 |
Exposure time | 1/80 sec (0.0125) |
F-number | f/3.2 |
ISO speed rating | 1,250 |
Date and time of data generation | 14:09, 10 July 2018 |
Lens focal length | 14 mm |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Camera Raw 9.12.1 (Macintosh) |
File change date and time | 17:36, 10 July 2018 |
Exposure Program | Manual |
Exif version | 2.3 |
Date and time of digitizing | 14:09, 10 July 2018 |
APEX shutter speed | 6.321928 |
APEX aperture | 3.356144 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
DateTimeOriginal subseconds | 62 |
DateTimeDigitized subseconds | 62 |
Color space | Uncalibrated |
Focal plane X resolution | 2,301.3246154785 |
Focal plane Y resolution | 2,301.3246154785 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Focal length in 35 mm film | 14 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 6022469 |
Lens used | 14.0-24.0 mm f/2.8 |
Date metadata was last modified | 19:36, 10 July 2018 |
Unique ID of original document | E74097CE974EED0205CB3F7070A67211 |
IIM version | 4 |