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Home > Public Information > ING Newsletter > No. 6, October 2002 > Telescope Time |
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INGRID | SCIENCE |
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Other available formats: PDF
A New Definition of Dark,Grey and Bright Time at INGFigure 1. The brightening of the dark sky (Vsky=21.9
mag/arcsec2, corresponding to low airmass, high ecliptic and galactic
latitude, and solar minimum) by scattered moonlight, calculated as a function
of fractional lunar illumination and angular distance from the Moon. [ JPEG | TIFF ] |
Dark: | 0.00 | ≤ | FLI | < | 0.25 |
Grey: | 0.25 | ≤ | FLI | < | 0.65 |
Bright: | 0.65 | ≤ | FLI | ≤ | 1.00 |
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