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 | | A fortuitous recent result of asteroidal spectrography found that the object under observation was, in fact, a nearly dormant comet. |
 | | For one thing, the WISE science page states that it "will be able to measure the diameters of more than 100,000 asteroids," but this is only a small fraction of the total main-belt population, which is in the range of 1.1-1.9 million, and that's just the ones more than a kilometer in diameter. |
 | | It will be better at detecting smaller asteroids closer to Earth, but any such observation must be completed by ground-based observers, who face the limitations of sensitivity, moonlight, and declination already mentioned; the spacecraft's survey program does not allow follow-up exposures for orbit determination. |
| avoyagetoarcturus.blogspot.com /2004_10_01_avoyagetoarcturus_archive.html (10673 words) |
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