File:Asteroids-PHA-and-NEA-Orbits.jpg
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[edit]DescriptionAsteroids-PHA-and-NEA-Orbits.jpg |
English: The Hustle and Bustle of our Solar System
http://solarsystem.nasa.gov/multimedia/display.cfm?Category=Planets&IM_ID=13624 Rate this Image (about ratings) Hi-Res (1.14 MB) The Hustle and Bustle of our Solar System Date: 16 May 2012 This diagram illustrates the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange). PHAs are a subset of the near-Earth asteroids (NEAs). They have the closest orbits to Earth's orbit, coming within 5 million miles (about 8 million kilometers), and they are large enough to survive passage through Earth's atmosphere and cause damage on a regional, or greater, scale. > Unlabelled version (JPG, 1.12 MB) Our yellow sun sits at the center of the crowd, while the orbits of the planets Mercury, Venus and Mars are shown in grey. Earth's orbit stands out in green between Venus and Mars. As the diagram indicates, the PHAs tend to have more Earth-like orbits than the rest of the NEAs. The asteroid orbits are simulations of what a typical object's path around the sun might look like. The dots in the background are based on data from NASA's NEOWISE, the asteroid-hunting portion of the Wide-field Infrared Survey Explorer (WISE) mission, which scanned the whole sky twice in infrared light before entering hibernation mode in 2011. The blue and orange dots represent a simulation of the population of near-Earth asteroids and the PHAs, respectively, which are larger than 330 feet (100 meters). NEOWISE has provided the best overall look at the PHA population yet, refining estimates of their numbers, sizes, types of orbits and potential hazards. The NEOWISE team estimates that about 20 to 30 percent of the PHAs thought to exist have actually been discovered to date. Credit: NASA/JPL-Caltech |
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Source | http://solarsystem.nasa.gov/multimedia/gallery/NEA_Orbits.jpg |
Author | NASA/JPL-Caltech |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
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Height | 2,016 px |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 399.9992 dpi |
Vertical resolution | 399.9992 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5 Macintosh |
File change date and time | 17:34, 15 May 2012 |
Color space | sRGB |
Date and time of digitizing | 09:58, 9 May 2012 |
Date metadata was last modified | 10:34, 15 May 2012 |
Unique ID of original document | xmp.did:01801174072068119109E15FC3D31A8E |