轉信站: GIBBS!ccnews.ncku!news.ccns.ncku!news.mksh.phc!news.nsysu!ctu-gate!ctu- Origin: sally.csie.ntu.edu.tw C/2006 P1 現在亮度越來越暗嚕， 沒有來得及看到彗星"倩影"的人或許還有其他的機會喔^^ 剛剛心血來潮搜尋了一下... 今年上半年天象真多(但賣相不見得好啦^^") 三月有日偏食、月全食 緊接著四月又有兩顆"六等以上"的彗星來報到了 --------------------------------------------------------------------------- 周期彗星2號 2P/Encke (週期短的常客，大約四年回歸一次) 4月19日近日點 http://www.aerith.net/comet/catalog/0002P/2007.html http://www.aerith.net/comet/catalog/0002P/2007-mag.gif 這個網頁預估Encke最大亮度達到六等 http://cfa-www.harvard.edu/iau/Ephemerides/Comets/0002P.html 這邊則預估會有四等的實力 Date TT R.A.(2000) Decl. Delta r Elong. Phase m1 m2 2007 03 21 01 22.36 +14 56.5 1.548 0.775 25.3 33.4 10.8 18.3 2007 03 26 01 38.13 +16 06.0 1.457 0.685 24.3 36.9 9.8 18.0 2007 03 31 01 55.38 +17 11.1 1.354 0.593 23.6 42.3 8.8 17.7 2007 04 05 02 14.01 +18 04.4 1.236 0.502 23.0 51.1 7.5 17.4 2007 04 10 02 33.15 +18 30.7 1.102 0.420 22.4 65.3 6.1 17.1 2007 04 11 02 36.84 +18 30.5 1.073 0.405 22.2 69.0 5.8 17.1 2007 04 12 02 40.41 +18 27.8 1.043 0.392 22.0 73.1 5.5 17.1 2007 04 13 02 43.81 +18 22.2 1.013 0.379 21.7 77.6 5.2 17.1 2007 04 14 02 46.99 +18 13.5 0.982 0.368 21.4 82.5 5.0 17.2 2007 04 15 02 49.90 +18 01.1 0.951 0.359 20.9 87.8 4.7 17.3 2007 04 16 02 52.45 +17 44.7 0.919 0.351 20.4 93.4 4.5 17.4 2007 04 17 02 54.60 +17 24.1 0.888 0.345 19.8 99.4 4.3 17.5 2007 04 18 02 56.27 +16 58.8 0.857 0.341 19.1 105.7 4.2 17.7 2007 04 19 02 57.41 +16 28.7 0.826 0.339 18.2 112.1 4.0 18.0 2007 04 20 02 57.98 +15 53.7 0.796 0.340 17.3 118.7 4.0 18.4 2007 04 21 02 57.93 +15 13.8 0.767 0.342 16.1 125.4 3.9 18.9 2007 04 22 02 57.26 +14 29.1 0.739 0.347 14.9 132.0 3.9 19.5 2007 04 23 02 55.96 +13 39.7 0.713 0.354 13.5 138.4 4.0 20.2 2007 04 24 02 54.07 +12 46.2 0.689 0.362 12.1 144.4 4.1 21.0 2007 04 25 02 51.63 +11 48.9 0.666 0.372 10.6 150.0 4.2 21.9 2007 04 26 02 48.67 +10 48.3 0.645 0.384 9.3 155.0 4.3 23.0 2007 04 27 02 45.25 +09 44.9 0.626 0.397 8.2 158.8 4.5 24.1 2007 04 28 02 41.45 +08 39.4 0.609 0.411 7.5 161.3 4.6 24.9 2007 04 29 02 37.31 +07 32.3 0.594 0.425 7.5 161.9 4.8 25.2 2007 04 30 02 32.91 +06 24.2 0.580 0.441 8.3 160.8 5.0 24.8 2007 05 05 02 08.72 +00 45.0 0.534 0.527 17.9 144.0 6.0 21.2 2007 05 10 01 44.37 -04 21.4 0.513 0.618 29.6 126.1 6.9 19.4 2007 05 15 01 22.13 -08 39.6 0.507 0.710 40.9 111.2 7.8 18.5 2007 05 20 01 02.27 -12 15.1 0.508 0.800 51.3 99.0 8.6 18.1 2007 05 25 00 44.17 -15 19.9 0.511 0.887 61.2 88.6 9.3 17.9 2007 05 30 00 26.98 -18 05.2 0.514 0.972 70.6 79.5 9.9 17.8 2007 06 04 00 09.87 -20 39.2 0.517 1.055 79.9 71.2 10.4 17.7 2007 06 09 23 52.13 -23 06.9 0.521 1.134 89.2 63.5 10.9 17.6 --------------------------------------------------------------------------- 接著是週期彗星 96P/Machholz (周期約五年多) 4月4日近日點 http://www.aerith.net/comet/catalog/0096P/2007.html http://www.aerith.net/comet/catalog/0096P/2007-mag.gif 這邊預估有二等以上的程度 http://cfa-www.harvard.edu/iau/Ephemerides/Comets/0096P.html 這邊預估2.2等 Date TT R.A.(2000) Decl. Delta r Elong. Phase m1 m2 2007 03 23 00 14.56 -18 06.9 1.308 0.488 19.0 41.6 9.8 18.6 2007 03 24 00 20.31 -16 48.5 1.286 0.459 18.1 42.4 9.5 18.5 2007 03 25 00 26.15 -15 24.6 1.265 0.430 17.2 43.3 9.1 18.4 2007 03 26 00 32.06 -13 54.5 1.244 0.400 16.2 44.2 8.7 18.2 2007 03 27 00 38.05 -12 17.5 1.223 0.369 15.2 45.1 8.2 18.0 2007 03 28 00 44.09 -10 32.5 1.202 0.337 14.1 46.0 7.7 17.8 2007 03 29 00 50.15 -08 38.3 1.181 0.305 12.9 47.0 7.2 17.6 2007 03 30 00 56.17 -06 33.6 1.160 0.272 11.7 48.0 6.5 17.3 2007 03 31 01 02.06 -04 16.3 1.138 0.239 10.4 49.3 5.8 17.0 2007 04 01 01 07.63 -01 43.9 1.115 0.205 9.2 51.1 5.0 16.7 2007 04 02 01 12.54 +01 06.1 1.091 0.174 8.1 54.3 4.1 16.4 2007 04 03 01 16.13 +04 15.0 1.064 0.146 7.3 60.5 3.1 16.1 2007 04 04 01 17.29 +07 37.6 1.033 0.128 7.0 71.5 2.4 16.1 2007 04 05 01 14.90 +10 54.5 1.001 0.126 7.2 86.2 2.2 16.5 2007 04 06 01 09.19 +13 40.2 0.970 0.140 8.0 98.7 2.7 17.2 2007 04 07 01 01.61 +15 46.1 0.943 0.166 9.2 105.7 3.5 17.9 2007 04 08 00 53.43 +17 19.1 0.921 0.197 10.8 108.5 4.4 18.4 2007 04 09 00 45.24 +18 28.3 0.903 0.230 12.6 109.0 5.1 18.7 2007 04 10 00 37.30 +19 20.8 0.887 0.264 14.5 108.4 5.8 18.9 2007 04 11 00 29.70 +20 01.2 0.874 0.297 16.4 107.2 6.4 19.1 2007 04 12 00 22.44 +20 32.7 0.862 0.329 18.4 105.7 6.9 19.2 2007 04 13 00 15.51 +20 57.4 0.851 0.361 20.4 104.2 7.3 19.3 2007 04 14 00 08.89 +21 16.8 0.842 0.392 22.4 102.6 7.7 19.3 2007 04 15 00 02.56 +21 32.0 0.833 0.422 24.4 101.0 8.1 19.4 2007 04 16 23 56.48 +21 44.0 0.824 0.452 26.4 99.5 8.4 19.5 2007 04 17 23 50.63 +21 53.2 0.817 0.481 28.3 98.0 8.7 19.5 2007 04 18 23 44.98 +22 00.2 0.809 0.509 30.3 96.5 9.0 19.5 2007 04 19 23 39.51 +22 05.3 0.802 0.537 32.2 95.1 9.3 19.6 2007 04 20 23 34.20 +22 08.9 0.795 0.564 34.1 93.7 9.5 19.6 2007 04 21 23 29.03 +22 11.1 0.788 0.591 36.0 92.4 9.7 19.6 2007 04 22 23 23.98 +22 12.2 0.782 0.617 37.9 91.1 9.9 19.6 --------------------------------------------------------------------------- 不過呢，2P是一顆歷史悠久的小彗星，要見到壯觀的彗尾有點難 96P則是著名的掠日彗星，亮度是暴起暴落型，上次回歸達-2等(但沒排進排名@@) 跟最近C/2006 P1一樣，可以在SOHO影像看到它^^而且彗核比較小，可以看彗星全貌 http://sohowww.nascom.nasa.gov/gallery/Movies/cometM/cometMsm.mpg 2002年96P回歸的SOHO影像 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.122.150.47