File:US Navy 030826-N-9593R-043 Personnel at the U.S. Naval Observatory in Washington, D.C., prepare the facility's historic 26-inch refractor telescope for optical viewing of Mars.jpg
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DescriptionUS Navy 030826-N-9593R-043 Personnel at the U.S. Naval Observatory in Washington, D.C., prepare the facility's historic 26-inch refractor telescope for optical viewing of Mars.jpg |
English: Personnel at the U.S. Naval Observatory in Washington, D.C., prepare the facility's historic 26-inch refractor telescope for optical viewing of Mars. The telescope is the same one that discovered Phobos and Deimos, the two moons of Mars, in 1877. The telescope, which still uses the original optics, normally has a camera known as a speckle interferometer mounted in the viewing position for deep space studies. The United States Naval Observatory (USNO) performs an essential scientific role for the U.S. Navy, and Department of Defense (DOD). Its mission includes determining the positions and motions of the Earth, Sun, Moon, planets, stars, and other celestial objects; providing astronomical reference data; measuring the Earth’s rotation and orientation; determining precise time; and maintaining the Master Clock for the United States. U.S. Navy photo by Chief Warrant Officer 4 Seth Rossman |
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Date | Taken on 26 August 2003 | |||
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Author | U.S. Navy photo by Chief Warrant Officer 4 Seth Rossman |
Licensing edit
Public domainPublic domainfalsefalse |
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:44, 22 October 2009 | 1,500 × 2,137 (1.2 MB) | BotMultichillT (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Washington, D.C. (August 26, 2003) -- Personnel at the U.S. Naval Observatory in Washington, D.C., prepare the facility's historic 26-inch refractor telescope for optical viewing of Mars. The telesc |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D1H |
Exposure time | 13,421,773/1,073,741,824 sec (0.012500000186265) |
F-number | f/7.1000061035156 |
ISO speed rating | 320 |
Date and time of data generation | 10:44, 26 August 2003 |
Lens focal length | 12 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop 7.0 |
File change date and time | 06:21, 27 August 2003 |
Exposure Program | Manual |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Color space | Uncalibrated |