File:Rings of Neptune PIA01997.png

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DescriptionRings of Neptune PIA01997.png	two 591-second exposures of the rings of Neptune were taken with the clear filter by the Voyager 2 wide-angle camera on Aug. 26, 1989 from a distance of 280,000 kilometers (175,000 miles). This PNG was converted from NASA's original TIFF with IrfanView, and differs from NASA's JPG version at File:Rings of Neptune PIA01997.jpg. ImageMagick's report on difference between NASA's TIFF and NASA's JPG shows distortion: ImageMagick-6.5.7-Q16\compare.exe -verbose -metric mae Rings_of_Neptune_PIA01997.tif "PIA01997.jpg" PIA01997.TIFFdiffJPG.png Rings_of_Neptune_PIA01997.tif TIFF 700x512 700x512+0+0 8-bit Grayscale DirectClass 158KiB 0.000u 0:00.006 PIA01997.jpg JPEG 700x512 700x512+0+0 8-bit PseudoClass 256c 69.7KiB 0.000u 0:00.008 Rings_of_Neptune_PIA01997.tif=>PIA01997.TIFFdiffJPG.png TIFF 700x512 700x512+0+0 8-bit DirectClass 288KiB 0.343u 0:00.336 Image: Rings_of_Neptune_PIA01997.tif Channel distortion: MAE red: 1169.97 (0.0178526) green: 1169.97 (0.0178526) blue: 1169.97 (0.0178526) all: 1169.97 (0.0178526) ImageMagick's report on difference between NASA's TIFF and derived PNG shows no distortion: ImageMagick-6.5.7-Q16\compare.exe -verbose -metric mae Rings_of_Neptune_PIA01997.tif "Rings_of_Neptune_PIA01997.png" PIA01997.pngdiffTIFF.png Rings_of_Neptune_PIA01997.tif TIFF 700x512 700x512+0+0 8-bit Grayscale DirectClass 158KiB 0.000u 0:00.005 Rings_of_Neptune_PIA01997.png PNG 700x512 700x512+0+0 8-bit PseudoClass 61c 128KiB 0.000u 0:00.009 Rings_of_Neptune_PIA01997.tif=>PIA01997.pngdiffTIFF.png TIFF 700x512 700x512+0+0 8-bit DirectClass 160KiB 0.296u 0:00.261 Image: Rings_of_Neptune_PIA01997.tif Channel distortion: MAE red: 0 (0) green: 0 (0) blue: 0 (0) all: 0 (0)
Date	26 August 1989
Source	[1] from Catalog Page for PIA01997, converted to PNG with IrfanView
Author	Voyager 2, NASA/JPL
Other versions	Original Full-Res TIFF from NASA Original Full-Res JPEG version from NASA

File:Rings of Neptune PIA01997.png

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26 August 1989

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