| Mars
in Near-Infrared with IRCS
Subaru's Infrared
Camera and Spectrograph (IRCS) detects light in the near-infrared
in the wavelength range of 1-5 microns. During Mars' close
approach to Earth on August 27, 2003, IRCS took a near-infrared
image of Mars. The apparent diameter is approximately 25
arcseconds (1 arcseconds is 1/3600 of a degree). Since
IRCS observed Mars in different wavelengths and at different
times, the colors and patterns are different from the
following images from the NHK HDTV camera.
Mars in
Visible Light with NHK Ultra-High-Sensitivity HDTV Camera
NHK's (Japan
Broadcasting Corporation) Ultra-High-Sensitivity High-Definition
TV camera took a look at mars through Subaru Telescope
on July 20, 2003 (approximately one month before the
close approach) and on August 23, 2003 (a few days before
the close approach). The data was recorded in video-rate
(30 shots per second). The video data was processed
by a computer to produce still images. The apparent
diameter of Mars was approximately 20 arcseconds on
July 20, 2003, and approximately 25 arcseconds on August
23, 2003.
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| July,
20, 2003 |
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August
23, 2003 |
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September 16,
2003 |
