File:Comet Bennett 26.17.jpg
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[edit]DescriptionComet Bennett 26.17.jpg |
English: Comet Bennett on 1970 April 9.5 UT. Image 1 and 2: 30 and 15 s exposures, 15min apart, with F=30 cm Aero Ektar. Image 3 and 4: superimposed negative and positive to show differences between the two images. Image 5: composite of 4 images taken within 15 minutes. |
Date | |
Source | Photographic Observations of Comet Bennett, 1970II Comets: Scientific Data and Missions (1972) |
Author | S.M. Larson and R.B. Minton |
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[edit]Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
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current | 15:13, 10 February 2023 | 1,492 × 795 (404 KB) | C messier (talk | contribs) | Uploaded a work by S.M. Larson and R.B. Minton from [https://ntrs.nasa.gov/api/citations/19730003106/downloads/19730003106.pdf Photographic Observations of Comet Bennett, 1970II] ''Comets: Scientific Data and Missions'' (1972) with UploadWizard |
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9 April 1970
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a3a946431a606517b360644315887e3e06dbb0f9
413,854 byte
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1,492 pixel
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