| タイトル | Lunar libration region L4 photometry |
| 著者（英） | Dunkelman, L.; Klinglesmith, D. A.; Alvord, G. C.; Mercer, R. D. |
| 著者所属（英） | Operations Research, Inc.|State Univ. of New York|NASA Goddard Space Flight Center|Arizona Univ. |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | Photometry of the lunar libration region L4 obtained in double umbra during the lunar orbital flight of Apollo 15 is reported. A four-minute photographic exposure of the region centered at celestial coordinates 23 h 14 m, -1.8 deg was made using a 35-mm camera at f/1.2 in the command module pilot's window. The film had been calibrated to the sun's surface brightness, and scene brightness information was converted to digital form, followed by high-speed digital processing with vignetting removal to obtain absolute photometric values. Results reveal an elliptical brightness region 16 x 12 deg in extent with an absolute brightness of 3.3 x 10 to the -14th sun surface brightness units. The mass of the scattering material responsible for the effect is estimated to be between 6 x 10 to the 18th and 2 x 10 to the 7th g. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 80A13751 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/423932 |
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