扫把星
大凶！！！！！！ 美女看了可好——大xiong
最近的观测数据
http://cfa-www.harvard.edu/icq/CometMags.htmlCOMET C/2006 P1 (McNaught)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2007
Feb.1.03, 3.0*, 3' (W. Robledo, Cordoba, Argentina, 5-cm refractor; comet alt. 9 deg; moonlight, light pollution);
1.02, 2.7*, 2'.0 (L. A. Mansilla, Rosario, Argentina, 7x50 binoculars;tail > 1 deg long; comet alt. 10 deg.; moonlight interference, urban sky);
Jan. 31.93, 2.6*, 4' (J. G. de S. Aguiar, Campinas, Brasil,naked eye; tail > 1.3 deg long);
31.52, 2.5, -- (D. J. Frew, Perth Observatory, naked eye and 8x42 binoculars; tail length > 7 deg; alt. about 11 deg; astron. twilight; moonlight; comp. stars at similar alt.);
31.32, 2.3*, 2' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 6 deg.; nautical twilight);
31.03, 2.4*, 2'.0 (L. A. Mansilla, Rosario, Argentina, 7x50 binoculars;tail about 2 deg long; comet alt. 9 deg.; astron. twilight; moonlight; suburban sky);
30.93, 2.5*, 5' (J. G. de S. Aguiar, Campinas, Brasil,naked eye; tail > 2 deg long);
30.32, +1.8*, 1' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 5 deg.; morning nautical twilight; clouds);
29.96, +2.9*, -- (A. Amorim, Florianopolis, Brazil, naked eye; 4-deg tail; comet alt. 8 deg.; moonlight);
29.65, +2.3:, & 4' (J. Drummond, Gisborne, New Zealand, naked eye; comet alt. 8 deg, morning sky, no moon; 15-deg tail);
29.53, +2.2, -- (D. J. Frew, Perth Observatory, naked eye; tail about 8 deg long; alt. about 8 deg; comp. stars alpha Pav and gamma Gru at similar alt.);
29.52, +2.4, -- (A. Pearce, Nedlands, W. Australia, naked eye; 7-deg tail; moonlight);
29.02, +1.6*, & 1'.5 (L. A. Mansilla, Rosario, Argentina, naked eye; tailabout 4 deg long; comet alt. 9 deg.; astron. twilight; comp. w/ alpha Gru andalpha Tuc; urban sky);
28.33, +0.8*, 1' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 5 deg.; nautical twilight);
27.33, +0.4*, 1' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 3.6 deg.; nautical twilight);
26.33, +2.0*, -- (A. Amorim, Florianopolis, Brazil, 7x50 binoculars;comet alt. 4 deg.; nautical twilight; morning);
26.03, +2:*, -- (W. Robledo, Pilar, Argentina, naked eye; comp. w/ gamma TrA; tail > 10 deg long; moonlight);
25.52, +0.4*, -- (A. Pearce, City Beach, W. Australia, naked eye; alt. 8 deg; 20-deg tail; moonlight, light pollution);
25.51, +1.7*, -- (D. J. Frew, Perth Observatory, naked eye; tail about 20 deg long; alt. about 10 deg; moonlight);
24.95, +0.6*, 3' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 9 deg.; nautical twilight; cirrus);
24.53, -0.3*, -- (A. Pearce, City Beach, W. Australia, naked eye; 26-deg tail; moonlight);
24.51, +1.6*, -- (D. J. Frew, Perth Observatory, naked eye and 8x42 binoculars; astron. twilight, moonlight, thin cloud; tail > 20 deg long; comet alt. about 9 deg);
23.94, +0.9*, 3' (A. Amorim, Florianopolis, Brazil, 7x50 binoculars; comet alt. 10 deg.; nautical twilight; clouds);
23.93, +0.9, -- (J. G. de S. Aguiar, Campinas, Brazil, naked eye; comp. w/ Fomalhaut and Achernar; tail > 1 deg long, strongly curved);
23.53, +1.5*, -- (D. J. Frew, Perth Observatory, naked eye; comp. w/ alpha and beta Gru, and Fomalhaut; uncertainty +/- 0.5 mag; 30-deg tail strongly curved, but synchrones now less obvious; comet alt. 6 deg);
22.52, +0.8*, -- (D. J. Frew, Perth Observatory, naked eye; comp. w/ beta Cen and Fomalhaut (uncertainty +/- 0.3); alt. 7 deg; tail length > 25 deg; tail strongly curved w/ obvious synchronic banding visible by naked eye);
22.51, -0.3*, -- (A. Pearce, City Beach, W. Australia, naked eye; 24-deg tail; moonlight now noticeably washing out the tail);
21.51, 0.0*, -- (A. Pearce, City Beach, W. Australia, naked eye; 24-deg tail);
21.04, -1.6, -- (L. A. Mansilla, Cnel. Dominguez, Argentina, naked eye; tail > 30 deg long; striations easily visible);
21.03, +1.0, -- (W. Liller, Vina del Mar, Chile, naked eye; 18-deg tail; comp. w/ Fomalhaut and Achernar);
21.03, -1:*, & 2' (W. Robledo, Pilar, Argentina, naked eye; comp. w/ Alnair; tail length > 25 deg; multiple synchronic bands within the dust tail);
20.96, -1.5*, 1' (W. Souza, Sao Paulo, Brazil, 11x80 binoculars; alt. about 1 deg);
20.52, -0.5, -- (D. J. Frew, Perth Observatory, 8x42 binoculars and naked eye; strongly curved tail 25-30 deg long, nearly 15 deg wide, shows remarkable synchronic band structure);
20.51, -0.7*, -- (A. Pearce, City Beach, W. Australia, naked eye; 23-deg tail);
20.03, 0.0, -- (W. Liller, Vina del Mar, Chile, naked eye; 18-deg tail);
20.03, -2.5:, & 2' (W. Robledo, Pilar, Argentina, naked eye; tail > 10 deg long, multiple synchronic bands visible; comp. w/ Venus; after sunset; alt. 4 deg; poor conditions);
19.51, -0.4*, -- (A. Pearce, City Beach, W. Australia, naked eye; 20-deg tail, striations easily visible); ;P我还是看好S1或者L4，特别关注SI