File:Phobos close up ESA310133.jpg
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DescriptionPhobos close up ESA310133.jpg |
English: Mars' moon Phobos has already been extensively observed – this image is just one example, taken in 2009 – so its occultation of Mars Express on 28 April 2014 is not expected to yield dramatic discoveries.
But science lies in the smallest things – like obtaining a 'snapshot in time' of continuous change. The occultation meant that, for a brief time, Phobos passed between Mars Express and Earth, blocking the spacecraft’s radio signal. The break in the signal was small – about nine seconds – but the precise start and end times are valuable information. These will allow scientists to calculate the orbit of Phobos with great precision – specifically the mean distance from Mars, which is notoriously difficult to pin down because Phobos’ natural motion around the planet changes over time. Phobos and sister moon Deimos are formidable scientific enigmas. There is no confirmed theory of their origin that offers a satisfactory explanation for their current orbits and appearances. They could be excellent targets for future robotic landings. ESA experts analysed yesterday’s data from the tracking station and found the occultation to have started just before 01:08:24 GMT, lasting until shortly before 01:08:33 GMT. Now, we’ll know the orbit of Phobos with just a little more precision, at least for a while. More information on yesterday's occultation |
Date | |
Source | http://www.esa.int/spaceinimages/Images/2014/04/Phobos_close_up |
Author | European Space Agency |
Permission (Reusing this file) |
ESA/DLR/FU Berlin (G. Neukum),CC BY-SA 3.0 IGO |
Title InfoField | Phobos close up |
Mission InfoField | Mars Express |
Activity InfoField | Operations |
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current | 15:31, 24 May 2017 | 2,064 × 1,860 (651 KB) | Fæ (talk | contribs) | European Space Agency, Id 310133, http://www.esa.int/spaceinimages/Images/2014/04/Phobos_close_up, User:Fæ/Project_list/ESA |
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Metadata
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height | 1,860 |
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width | 2,064 |
Width | 2,064 px |
Height | 1,860 px |
Compression scheme | LZW |
Pixel composition | Black and white (Black is 0) |
Orientation | Normal |
Number of components | 1 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS4 Windows |
File change date and time | 11:32, 9 December 2009 |
Color space | Uncalibrated |
Image width | 2,064 px |
Image height | 1,860 px |
Bits per component | 8 |
Date and time of digitizing | 20:28, 8 October 2008 |
Date metadata was last modified | 12:32, 9 December 2009 |
Unique ID of original document | uuid:F944FA055695DD11966EEF914A2D131D |
IIM version | 2 |