从最近的数据来看，彗星确有缓慢变暗
不过到11月17日估计也能很容易看到，到时亮度在3等左右
COMET 17P/Holmes
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2007
Nov. 8.14, 2.7, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
8.10, 2.7, & 20' (A. Pereira, Cabo da Roca, Portugal, naked eye);
7.96, 2.8, 15' (J. Qvam, Borrevannet, Horten, Norway, 7x50 binoculars);
7.82, 2.4, 30' (T. Scarmato, Calabria, Italy, naked eye);
7.81, 2.6, -- (U. Pilz, Leipzig, Germany, naked eye);
7.50, 2.6, 23' (Y. Nagai, Gunma, Japan, 7x35 binoculars);
7.49, 3.0, 24' (S. Yoshida, Yokohama City, Kanagawa, Japan, naked eye);
7.49, 3.0, -- (R. O. Wheeler, Edmond, OK, U.S.A., naked eye);
7.19, 2.6, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
7.08, 2.6, 13' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; light pollution and clouds);
7.08, 2.7, & 20' (A. Pereira, Cabo da Roca, Portugal, naked eye);
6.83, 2.6, 22' (T. Karhula, Vasteras, Sweden, naked eye);
6.81, 2.9, 15' (S. Baroni, Milan, Italy, 7x50 binoculars);
6.78, 2.8, 5' (V. M. Ivanov, Saratov, Russia, naked eye);
6.73, 2.6, -- (M. Meyer, Limburg, Germany, naked eye);
6.72, 2.4, -- (U. Pilz, Leipzig, Germany, naked eye);
6.49, 3.0, -- (R. O. Wheeler, Edmond, OK, U.S.A., naked eye);
6.14, 2.5, 21' (A. Diepvens, Balen, Belgium, 20x50 binoculars);
6.09, 2.7, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
6.07, 2.4, -- (A. Pereira, Cabo da Roca, Portugal, naked eye);
5.90, 2.5, 10' (V. M. Ivanov, Saratov, Russia, naked eye);
5.89, 2.6, 20' (A. Baransky, Lisnyky, Ukraine, naked eye);
5.89, 2.5, & 15' (M. L. Paradowski, Lublin, Poland, 7x50 binoculars; city lights);
5.87, 2.6, 10' (A. Giambersio, Potenza, Italy, naked eye);
5.75, 2.7, -- (R. Y. Shida, Garching bei Muenchen, Germany, naked eye);
5.74, 2.7, 20' (K. Hornoch, Ondrejov, Czech Republic, naked eye);
5.65, 2.5, 19' (A. Novichonok, Kondopoga, Russia, 7x50 binoculars);
5.49, 3.0, -- (R. O. Wheeler, Edmond, OK, U.S.A., naked eye);
5.26, 2.6, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
5.12, 2.7, 16' (C. E. Spratt, Victoria, BC, Canada, 7x50 binoculars);
5.11, 2.7, -- (K. Cernis, Vilnius, Lithuania, naked eye);
5.01, 2.6, -- (A. Pereira, Cabo da Roca, Portugal, naked eye);
5.00, 2.6, 10' (V. M. Ivanov, Saratov, Russia, naked eye);
4.84, 2.5, 11' (V. Nevski, Vitebsk, Belarus, naked eye);
4.79, 2.6, 20' (K. Hornoch, Ondrejov, Czech Republic, naked eye);
4.73, 2.2, 25' (T. Scarmato, Calabria, Italy, naked eye);
4.64, 2.7, -- (A. Novichonok, Kondopoga, Russia, naked eye);
4.50, 3.0, -- (S. Yoshida, Kanagawa, Japan, naked eye; bright city sky, poor conditions);
4.23, 2.6, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
4.20, 2.6, 30' (P. Creed, Stillwell, OH, U.S.A., naked eye);
4.16, 2.7, -- (R. O. Wheeler, Edmond, OK, U.S.A., naked eye);
4.13, 2.4, 39' (M. L. Paradowski, Lublin, Poland, 25x100 binoculars; moonlight);
4.01, 2.6, -- (A. Pereira, Cabo da Roca, Portugal, naked eye);
3.99, 2.7, 20' (J. Carvajal, Madrid, Spain, naked eye);
3.91, 2.6, 15' (K. Hornoch, Sedlo, Czech Republic, naked eye);
3.91, 2.6, -- (A. Novichonok, Konchezero, Russia, naked eye);
3.90, 2.6, 15' (R. Haver, Frasso Sabino, Italy, naked eye);
3.87, 2.6, -- (A. Giambersio, Potenza, Italy, naked eye);
3.81, 2.6, 20' (Y. Nagai, Gunma, Japan, naked eye);
3.78, 2.3, 30' (J. J. Gonzalez, Leon, Spain, naked eye);
3.74, 2.5, 40' (T. Karhula, Virsbo, Sweden, 25x100 binoculars);
3.74, 2.0, 20' (T. Scarmato, Calabria, Italy, naked eye);
3.73, 2.5, 10' (V. M. Ivanov, Saratov, Russia, naked eye);
3.49, 2.6, 30' (K. Yoshimoto, Yamaguchi, Japan, 7x35 binoculars);
3.48, 2.1, 20' (S. Yoshida, Gunma, Japan, naked eye; dark sky);
2.99, 2.6, 22' (J. Carvajal, Avila, Spain, naked eye);
2.96, 2.5, -- (A. Pereira, Cabo da Roca, Portugal, naked eye);
2.90, 2.4, 10' (R. Haver, Roma, Italy, naked eye);
2.90, 2.9, -- (F. Gobet, Cestas, France, naked eye);
2.83, 2.4, & 15' (M. L. Paradowski, Lublin, Poland, naked eye);
2.83, 2.4, 12' (S. Baroni, Milan, Italy, 7x50 binoculars);
2.83, 1.9, 20' (T. Scarmato, Calabria, Italy, naked eye);
2.81, 2.8, -- (V. Lozitsky, Kyiv, Ukraine, 7x35 binoculars);
2.68, 2.6, 10' (V. Nevski, Vitebsk, Belarus, naked eye);
2.51, 2.6, 32' (K. Yoshimoto, Yamaguchi, Japan, 7x35 binoculars);
2.17, 2.5, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
2.14, 2.4, -- (J. Rao, Putnam Valley, NY, U.S.A., naked eye);
1.96, 2.4, -- (A. Pereira, Cabo da Roca, Portugal, naked eye);
1.92, 2.4, 19' (J. Carvajal, Madrid, Spain, 4x20 binoculars);
1.86, 2.6, 10' (R. Haver, Roma, Italy, naked eye);
1.85, 2.1, 15' (T. Scarmato, Calabria, Italy, naked eye);
1.82, 2.5, -- (R. Y. Shida, Garching, Germany);
1.80, 2.6, 20' (K. Yoshimoto, Yamaguchi, Japan, 7x35 binoculars);
1.79, 2.3, 25' (J. J. Gonzalez, Leon, Spain, naked eye);
1.77, 2.8, 3' (V. M. Ivanov, Saratov, Russia, naked eye);
1.77, 2.5, 15' (K. Hornoch, Vohancice, Czech Republic, naked eye);
1.76, 2.2, 14' (T. Karhula, Vasteras, Sweden, naked eye);
1.75, 2.6, -- (M. Lehky, Hradec Kralove, Czech Republic, naked eye);
1.72, 2.8, -- (S. Foglia, Novara, Italy, naked eye);
1.69, 2.7, -- (A. Novichonok, Kondopoga, Russia, naked eye);
1.45, 2.5, -- (R. O. Wheeler, Edmond, OK, USA, naked eye);
1.22, 2.5, -- (D. W. E. Green, Lexington, MA, U.S.A., naked eye);
1.15, 2.5, -- (W. Souza, Sao Paulo, Brazil, naked eye);
1.13, 2.5, 14' (C. E. Spratt, Victoria, BC, Canada, 7x50 binoculars);
1.09, 3.4, 7' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; light pollution); |
置顶卡
变色卡
千斤顶
显身卡
