About the Object Object Name: Mars Object Description: Closest Approach 2003 Distance from the Sun: The semi-major axis of Mars' orbit about the sun is 1.52 Astronomical Units (A.U.) or 142 million miles (228 million km). Distance from the Earth: At the 2003 closest approach, Mars was approximately 35 million miles (56 million kilometers) from Earth. Dimensions: The planet has a diameter of 4,222 miles (6,794 kilometers) at the equator. About the Data Data Description: These data are taken from HST proposal 10065 by J. Bell (Cornell U.), M. Wolff (Space Science Institute), A. Lubenow (STScI), and K. Noll (STScI). Additional image processing and analysis support from: K. Noll and A. Lubenow (STScI); M. Hubbard (Cornell U.); R. Morris (NASA/JSC); P. James (U. Toledo); S. Lee (U. Colorado); and T. Clancy, B. Whitney and G. Videen (SSI); and Y. Shkuratov (Kharkov U.). Instrument: HST/WFPC2 Exposure Dates/Filters: Image 1: August 26, 2003 22:21:52 - 23:12:18 Universal Time; F410M ("B"), F502N ("V"), F631N ("R")
Image 2: August 27, 2003 09:35:28 - 10:22:54 Universal Time; F410M (B), F502N (V), F673N (R) About the Image Image Credit: NASA, J. Bell (Cornell U.), and M. Wolff (SSI) Release Date: Image 1: August 27, 2003 6:00AM (EDT) Image 2: August 27, 2003 4:00PM (EDT)
Fast_Facts
Technical facts about this news release:
About the Object Object Name: Mars Object Description: Closest Approach 2003 Distance from the Sun: The semi-major axis of Mars' orbit about the sun is 1.52 Astronomical Units (A.U.) or 142 million miles (228 million km). Distance from the Earth: At the 2003 closest approach, Mars was approximately 35 million miles (56 million kilometers) from Earth. Dimensions: The planet has a diameter of 4,222 miles (6,794 kilometers) at the equator. About the Data Data Description: These data are taken from HST proposal 10065 by J. Bell (Cornell U.), M. Wolff (Space Science Institute), A. Lubenow (STScI), and K. Noll (STScI). Additional image processing and analysis support from: K. Noll and A. Lubenow (STScI); M. Hubbard (Cornell U.); R. Morris (NASA/JSC); P. James (U. Toledo); S. Lee (U. Colorado); and T. Clancy, B. Whitney and G. Videen (SSI); and Y. Shkuratov (Kharkov U.). Instrument: HST/WFPC2 Exposure Dates/Filters: Image 1: August 26, 2003 22:21:52 - 23:12:18 Universal Time; F410M ("B"), F502N ("V"), F631N ("R")
Image 2: August 27, 2003 09:35:28 - 10:22:54 Universal Time; F410M (B), F502N (V), F673N (R) About the Image Image Credit: NASA, J. Bell (Cornell U.), and M. Wolff (SSI) Release Date: Image 1: August 27, 2003 6:00AM (EDT) Image 2: August 27, 2003 4:00PM (EDT)
Fast Facts
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*Image Type:*: Astronomical
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*Image Type:*: Astronomical
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*Release Date*:August 27, 2003 06:00 AM (EDT)
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*Release Date*:August 27, 2003 06:00 AM (EDT)
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*Title*:Mars: Closest Encounter
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*Title*:Mars: Closest Encounter
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*Additional image processing and analysis support from:*: K. Noll and A. Lubenow (STScI [ http://www.stsci.ed…]); M. Hubbard (Cornell U.); R. Morris (NASA [ http://www.nasa.gov/]/JSC); P. James (U. Toledo); S. Lee (U. Colorado); and T. Clancy, B. Whitney and G. Videen (SSI); and Y. Shkuratov (Kharkov U.)
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*Additional image processing and analysis support from:*: K. Noll and A. Lubenow (STScI [ http://www.stsci.ed…]); M. Hubbard (Cornell U.); R. Morris (NASA [ http://www.nasa.gov/]/JSC); P. James (U. Toledo); S. Lee (U. Colorado); and T. Clancy, B. Whitney and G. Videen (SSI); and Y. Shkuratov (Kharkov U.)
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*News Release Number:*: STScI-2003-22g
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*News Release Number:*: STScI-2003-22g
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*Description*:
NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 34,648,840 miles (55,760,220 km) away. This color image was assembled from a series of exposures taken between 6:20 p.m. and 7:12 p.m. EDT Aug. 26 with Hubble's Wide Field and Planetary Camera 2. The picture was taken just 11 hours before the planet made its closest approach to Earth in 60,000 years.
Many small, dark, circular impact craters can be seen, attesting to the Hubble telescope's ability to reveal fine detail on the planet's surface. One of the most striking is the 270-mile- (450-km-) diameter Huygens crater, seen near the centerof the image.
The two dominant dark swatches seen on this part of the planet are classical regions labeled by early Mars observers. The "shark-fin" shape to the right is Syrtis Major. The horizontal lane to the left is Sinus Meridani. One of NASA's Mars Exploration Rovers, named "Opportunity," will land at the western end of this region in January 2004.
The picture shows that it is a relatively warm summer on Mars, as evident in the lack of water-ice clouds at mid-latitude, and the receding southern polar cap. Ice on the rugged topography gives a somewhat ragged, scalloped look. Up north, at the top of the disk where it is Martian winter, a frigid polar hood of clouds covers the northern polar cap and surrounding region.
Even in the relatively balmy Southern Hemisphere, daytime highs are just above freezing in the Hellas impact basin, the circular feature near the image center. Hellas is nearly 5 miles deep (8 km). Hellas is like Death Valley ? except that Mars is much drier than even Death Valley. Having a diameter of 1,100 miles (1,760 km), Hellas was formed when an asteroid slammed into Mars billions of years ago. Many summer dust storms originate in this basin, though it is remarkably clear of dust in this Hubble image.
Mars and Earth have a "close encounter" about every 26 months. These periodic encounters are due to the differences in the two planets' orbits. Earth goes around the Sun twice as fast as Mars, lapping the red planet about every two years. Both planets have elliptical orbits, so their close encounters are not always at the same distance. In its close encounter with Earth in 2001, for example, Mars was about 9 million miles farther away. Because Mars will be much closer during this year's close approach, the planet appears 23 percent bigger in the sky.
This photograph is a color composite generated from observations taken with blue, green, and red filters. The resolution is 8 miles (12 km) per pixel.
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*Description*:
NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 34,648,840 miles (55,760,220 km) away. This color image was assembled from a series of exposures taken between 6:20 p.m. and 7:12 p.m. EDT Aug. 26 with Hubble's Wide Field and Planetary Camera 2. The picture was taken just 11 hours before the planet made its closest approach to Earth in 60,000 years.
Many small, dark, circular impact craters can be seen, attesting to the Hubble telescope's ability to reveal fine detail on the planet's surface. One of the most striking is the 270-mile- (450-km-) diameter Huygens crater, seen near the centerof the image.
The two dominant dark swatches seen on this part of the planet are classical regions labeled by early Mars observers. The "shark-fin" shape to the right is Syrtis Major. The horizontal lane to the left is Sinus Meridani. One of NASA's Mars Exploration Rovers, named "Opportunity," will land at the western end of this region in January 2004.
The picture shows that it is a relatively warm summer on Mars, as evident in the lack of water-ice clouds at mid-latitude, and the receding southern polar cap. Ice on the rugged topography gives a somewhat ragged, scalloped look. Up north, at the top of the disk where it is Martian winter, a frigid polar hood of clouds covers the northern polar cap and surrounding region.
Even in the relatively balmy Southern Hemisphere, daytime highs are just above freezing in the Hellas impact basin, the circular feature near the image center. Hellas is nearly 5 miles deep (8 km). Hellas is like Death Valley ? except that Mars is much drier than even Death Valley. Having a diameter of 1,100 miles (1,760 km), Hellas was formed when an asteroid slammed into Mars billions of years ago. Many summer dust storms originate in this basin, though it is remarkably clear of dust in this Hubble image.
Mars and Earth have a "close encounter" about every 26 months. These periodic encounters are due to the differences in the two planets' orbits. Earth goes around the Sun twice as fast as Mars, lapping the red planet about every two years. Both planets have elliptical orbits, so their close encounters are not always at the same distance. In its close encounter with Earth in 2001, for example, Mars was about 9 million miles farther away. Because Mars will be much closer during this year's close approach, the planet appears 23 percent bigger in the sky.
This photograph is a color composite generated from observations taken with blue, green, and red filters. The resolution is 8 miles (12 km) per pixel.
