一些地面观测的结果．
爱好者的报告：
http://deepimpact.umd.edu/gallery/images-collaborating.html
And that was if you could see the comet at all. The first problem was merely finding such a dim target (see below). Typical of the first visual reports from small-scope users was that posted by Karen A. Young of Wrightwood, CA, on the NASA/JPL amateur report page. She used a 6-inch f/8 reflector in which she could see stars to 12th magnitude. "Could not see comet visually, so watched the spot where the ephemeris predicted the comet to be," she wrote. "Comet did not brighten enough to be visible."
基特峰上20英寸望远镜拍摄的照片显示刚撞后彗星仅稍稍增亮：
http://www.noao.edu/news/deep-impact/
http://www.noao.edu/news/images/blink.gif
和
http://www.noao.edu/news/images/tempelfinal.gif
22:20:00 MST -> 23:45:00 MST
撞后1小时增亮~2等
"But the show was only starting! Comet expert Paul Weissman (NASA/JPL), observing with JPL's telescopes in Wrightwood, CA, was among many reporting that within an hour of the crash Tempel 1 had brightened by about 2 full magnitudes — a factor of six.
In the weeks before the impact, Tempel 1 proved to be an unexpectedly tough target for amateur scopes, especially in the presence of any light pollution or summer haze. By the beginning of July the comet was running about a magnitude fainter than predicted. From the moderately light-polluted outer suburbs of Boston, I was unable to see the comet even using a 12.5-inch telescope at 60x, 75x, and 180x on the clear evening of July 2nd, one night before the impact. On the same evening, however, Daniel W. E. Green saw the comet using a 10-inch reflector from the darkness of Pack Monadnock Mountain in New Hampshire. He estimated its brightness as magnitude 10.6 and the diameter of its coma as about 2.5 arcminutes.
Other experienced observers were estimating the magnitude as anywhere from from about 9.6 to 11.2, and the size of the coma from about 3 to 12 arcminutes in diameter. Some people lucky enough to have crystal-clear dark skies were detecting it with 3-inch scopes. " |
显身卡
