Weekly Information about Bright Comets (2009 Mar. 21: South)

Japanese version Home page	Updated on March 22, 2009
Last week North Next week

Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

C/2007 N3 ( Lulin ) It passed near by the earth in late February, and it reached up to 4.9 mag (Feb. 23, Juan Jose Gonzalez). The coma extended up to 20 arcmin, and the anti-tail was clearly visible. Now it is fading rapidly. It has already faded down to 8.3 mag (Mar. 20, Katsumi Yoshimoto). Because moving along the retrograde orbit, it will be lower rapidly in the evening sky. It will be too low to observe at 12 mag in late May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 7 7.22 21 49.4 1.026 1.606 105 7.8 19:34 (173, 33) Mar. 28 6 51.34 22 10.2 1.267 1.674 94 8.5 19:24 (165, 31) C/2006 W3 ( Christensen ) Brightening very rapidly, faster than expected. It is already so bright as 9.6 mag (Mar. 3, Juan Jose Gonzalez). It is expected to reach to 8 mag in 2009 summer. It becomes low tempporarily in February and March. But then it will be observable at 8-10 mag in good condition for a long time until late autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 22 41.07 34 6.6 4.012 3.296 38 9.6 4:39 (242,-20) Mar. 28 22 44.15 33 59.1 3.987 3.275 39 9.5 4:45 (239,-15) C/2009 E1 ( Itagaki ) New bright comet. Now it locates very low in the evening, and it will be not observable in April. But in the Northern Hemisphere, it will appear in the morning sky at 11 mag in early May, then it keeps observable in good condition while fading. In the Southern Hemisphere, it had been locating in good position until discovered in mid March, however, now it is not observable. It will appear in the morning sky in late May when it fades down to 12.5 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 2 32.04 15 46.2 1.069 0.715 40 10.2 19:34 (112, 3) Mar. 28 2 15.10 21 27.9 1.211 0.646 32 10.0 19:24 (112, -7) 144P/Kushida It brightened much faster than expected, and reached up to 8.4 mag (Jan. 30, Juan Jose Gonzalez). It was very large and visible through binoculars. It will be fading after this, but still bright as 9.6 mag (Mar. 19, Maik Meyer). It keeps locating high in the evening sky for a while. It keeps higher than 40 degree until mid May when it fades down to 14 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 6 37.43 17 22.1 1.059 1.558 98 10.7 19:34 (165, 36) Mar. 28 6 57.70 17 6.4 1.129 1.589 96 11.1 19:24 (165, 37) 67P/Churyumov-Gerasimenko Brightening very rapidly, faster than expected. Now it is bright as 9.7 mag (Mar. 15, Juan Jose Gonzalez), already visible visually. It keeps 10-11 mag and observable in the evening sky for a long time until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 2 53.44 19 21.5 1.737 1.272 46 11.0 19:34 (118, 5) Mar. 28 3 20.27 21 36.0 1.766 1.292 46 10.9 19:24 (121, 5) 22P/Kopff Now it is 12.3 mag, already visible visually (Mar. 3, Juan Jose Gonzalez). It will be bright at 9-10 mag for a long time from spring to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 18 44.78 -18 48.4 1.575 1.707 79 11.2 4:39 (250, 57) Mar. 28 19 4.45 -18 25.6 1.500 1.683 82 10.9 4:45 (245, 59) C/2007 Q3 ( Siding Spring ) Already very bright as 11.2 mag (Mar. 15, Marco Goiato). It is expected to brighten up to 10 mag from late 2009 to early 2010. Good condition in the Southern Hemisphere. In the Northern Hemisphere, it is observable in the evening low sky from February to April. Then it becomes unobservable until September. But after October, it is observable at 10 mag for a while in good condition. In the Southern Hemisphere, it keeps observable for a long time while brightening until June when it brightens to 11 mag. But it becomes unobservable around and after the brightest time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 5 30.26 -32 9.2 3.115 3.161 83 11.8 19:34 ( 88, 65) Mar. 28 5 36.55 -29 41.4 3.114 3.110 80 11.7 19:24 ( 92, 62) C/2006 OF2 ( Broughton ) It brightened up to 9.8 mag in December and January (Dec. 28, Juan Jose Gonzalez). Now it is fading, but still bright as 11.5 mag (Mar. 13, Juan Jose Gonzalez). It keeps visible visually for a long time until June when it becomes low in the evening at 13 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 6 27.45 37 47.4 2.904 3.152 95 11.9 19:34 (167, 16) Mar. 28 6 34.86 36 30.8 3.040 3.198 89 12.0 19:24 (165, 17) C/2008 T2 ( Cardinal ) Now it is very bright as 10.2 mag (Mar. 15, Juan Jose Gonzalez). It will reach to 10-11 mag in June. In the Northern Hemisphere, it keeps observable in good condition until May when it becomes brightest. But it will never be observable again after that. In the Southern Hemisphere, it is not observable until April. But after that, it will be observable while fading gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 4 27.29 48 45.3 1.727 1.750 74 12.1 19:34 (152, -3) Mar. 28 4 45.20 45 12.8 1.729 1.679 70 11.9 19:24 (150, 0) C/2007 G1 ( LINEAR ) It brightened up to 11.5 mag in summer (Aug. 4, Marco Goiato). Although it is not observable in the Northern Hemisphere, it keeps observable in good condition for a long time in the Southern Hemisphere. However, no visual observations have been reported since last summer. Recent CCD observations suggest that it is still visible visually around 12-13 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 2 28.96 -66 19.2 3.115 2.952 71 12.7 19:34 ( 30, 38) Mar. 28 2 54.97 -63 36.3 3.138 2.985 71 12.7 19:24 ( 33, 38) 116P/Wild 4 Now it is very bright as 11.7 mag (Mar. 15, Juan Jose Gonzalez). It keeps observable in good condition until May, then it keeps observable until July when it becomes too low in the evening sky, around 12-13 mag for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 9 19.52 19 55.5 1.514 2.332 135 12.7 21:23 (180, 35) Mar. 28 9 18.70 19 41.2 1.557 2.315 128 12.7 20:55 (180, 35) C/2008 A1 ( McNaught ) It reached to 6.3 mag in September in the southern sky (Sept. 4, Marco Goiato). It was bright at 10.0 mag still on Jan. 13 (U. Pilz). However, no visual observations have been reported since that. It has already faded down to 15.0 mag (Mar. 11, Ken-ichi Kadota). It keeps observable in the northern sky while fading gradually. In the Southern Hemisphere, it will never be observable again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 21 34.67 56 40.8 3.031 2.740 63 13.0 4:39 (215,-21) Mar. 28 21 50.68 59 26.4 3.111 2.820 64 13.2 4:45 (211,-21) C/2006 Q1 ( McNaught ) It reached to 10.9 mag in May (May 11, Marco Goiato). It is fading slowly. Now it is 14.0 mag (Mar. 11, Ken-ichi Kadota). It keeps bright as 13-14 mag for a long time after this until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 16 49.27 22 52.4 3.394 3.799 106 13.6 4:39 (184, 32) Mar. 28 16 50.30 24 50.3 3.381 3.845 110 13.7 4:29 (180, 30) 29P/Schwassmann-Wachmann 1 Since the major outburst in last September, with a new outburst in December, it has been so bright as 10-11 mag for about half a year. Now it is still bright as 11.2 mag (Mar. 13, Juan Jose Gonzalez). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 7 40.02 23 27.4 5.665 6.115 112 13.7 19:44 (180, 32) Mar. 28 7 40.20 23 20.1 5.773 6.116 105 13.7 19:24 (178, 32) 65P/Gunn Now it is 13.4 mag and visible visually (Mar. 3, Juan Jose Gonzalez). It will brighten up to 12-13 mag in 2010 summer. In 2009, it keeps observable in good condition until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 12 21.48 13 4.5 2.165 3.140 165 14.4 0:29 (180, 42) Mar. 28 12 16.08 13 31.7 2.149 3.119 163 14.4 23:51 (180, 41) C/2005 L3 ( McNaught ) Now it is 14.1 mag (Mar. 11, Ken-ichi Kadota). It had been bright and visible visually around 13 mag from spring to autumn in 2008. It will be visible visually at 14 mag again until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 14 49.23 33 7.5 5.723 6.390 128 14.7 2:56 (180, 22) Mar. 28 14 42.30 34 12.1 5.713 6.414 131 14.7 2:21 (180, 21) 64P/Swift-Gehrels The condition of this return is bad, and it has not been observed yet. It will appear in the morning low sky at 13.5 mag in June. Then it will be getting higher gradually while fading slowly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 23 5.10 -2 2.1 2.653 1.705 14 15.1 4:39 (276, -5) Mar. 28 23 23.30 0 11.1 2.595 1.660 16 14.9 4:45 (272, -3) 77P/Longmore Now it is visible visually at 13.7 mag (Mar. 3, Juan Jose Gonzalez). It will be observable at 15 mag in good condition in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 12 10.24 12 15.5 1.441 2.423 167 15.0 0:17 (180, 43) Mar. 28 12 1.98 11 35.8 1.433 2.409 164 14.9 23:37 (180, 44) 68P/Klemola It had been observed until mid January in the evening low sky. It reached up to 14.1 mag (Jan. 11, Ken-ichi Kadota). Now it is not observable. It will be observable again in summer, but it will be fainter than 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 0 1.32 -0 30.2 2.857 1.861 0 15.1 4:39 (283,-18) Mar. 28 0 18.68 0 54.9 2.882 1.885 2 15.3 4:45 (280,-15) C/2007 B2 ( Skiff ) It brightened up to 12.7 mag in 2008 spring (Apr. 12, Marco Goiato). But it faded down to 14.9 mag in July (July 22, Mitsunori Tsumura). No observations have been reported for a long time since last summer. But in the Southern Hemisphere, it has appeared in the morning sky, and it will be observable in good condition after this. It will never be observable again in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 19 29.97 -47 52.8 3.745 3.625 75 15.2 4:39 (305, 55) Mar. 28 19 39.68 -48 23.5 3.698 3.664 80 15.2 4:45 (307, 59) C/2008 Q3 ( Garradd ) No observations have been reported since last December. But now it should be already bright as 15 mag. It is expected to brighten up to 12.5 mag in May and June. The condition is good in the Southern Hemisphere, and it keeps observable for a long time until August. In the Northern Hemisphere, it is only observable from mid June to mid August in the evening low sky. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 21 25.35 -46 59.8 2.506 2.153 58 15.5 4:39 (307, 36) Mar. 28 21 25.63 -47 53.2 2.338 2.107 64 15.3 4:45 (306, 41) 85P/Boethin It was expected to reach up to 7 mag and to be observable in good condition in winter. But finally, the comet has never been recovered after all. This comet has not been observed since 1986. It was not detected, fainter than 20 mag on Dec. 1 (Takaaki Oribe). So it will be much fainter than expected, maybe already disappeared. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 5 6.40 26 19.9 1.618 1.709 77 15.4 19:34 (146, 20) Mar. 28 5 28.35 26 25.4 1.734 1.773 75 16.1 19:24 (147, 20) 74P/Smirnova-Chernykh Now it is 15.8 mag (Mar. 1, Ken-ichi Kadota). It will be observable at 15-16 mag in good condition until spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 9 5.16 24 41.3 2.857 3.587 130 15.4 21:09 (180, 30) Mar. 28 9 4.16 24 36.3 2.933 3.584 123 15.4 20:40 (180, 30) 19P/Borrelly It reached up to 9.6 mag in summer (Aug. 2, Juan Jose Gonzalez). Now it is fading. It has already faded down to 15.4 mag (Mar. 11, Ken-ichi Kadota). It keeps observable in good condition until June when it becomes fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 13 21.53 39 59.8 1.957 2.761 135 15.5 1:29 (180, 15) Mar. 28 13 12.48 40 12.0 2.007 2.808 135 15.6 0:52 (180, 15) 209P/2008 X2 ( LINEAR ) Brightened rapidly, and now it reached up to 16.2 mag (Mar. 10, Ken-ichi Kadota). It will be observable at 16.5 mag until April. It moves southwards very fast after early April, and will be unobservable very soon in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 19 23.98 61 55.8 0.302 0.991 80 16.3 4:39 (199,-13) Mar. 28 20 3.89 53 6.4 0.281 0.956 73 16.3 4:45 (205, -6) C/2006 U6 ( Spacewatch ) Now it is 16.1 mag (Feb. 1, Ken-ichi Kadota). It should have reached up to 14.5 mag in summer in the southern sky, but it is already fading. It keeps observable while the comet will be fading slowly after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 11 35.10 -11 29.9 2.921 3.898 166 16.3 23:38 (180, 66) Mar. 28 11 29.32 -9 18.9 2.979 3.949 164 16.3 23:04 (180, 64) 88P/Howell Now it is 17.0 mag (Mar. 18, Leonid Elenin). It will be brightening rapidly after this, and will be 10 mag in autumn. It keeps observable for a long time until 2010 February. But in the Northern Hemisphere, it will be lower than 20 degree after July when it becomes about 13 mag, then it keeps very low all through the brightest time. It locates a bit higher in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 13 14.32 -2 10.8 1.446 2.412 161 16.8 1:21 (180, 57) Mar. 28 13 8.37 -1 34.6 1.378 2.366 169 16.5 0:48 (180, 57) 59P/Kearns-Kwee Now it is 16.8 mag (Feb. 21, Ken-ichi Kadota). It will be getting fainter and lower in the evening sky. It becomes unobservable in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 3 59.03 26 51.4 2.638 2.358 62 16.6 19:34 (134, 11) Mar. 28 4 13.17 27 4.5 2.712 2.361 59 16.6 19:24 (133, 10) C/2008 Q1 ( Maticic ) Now it is 16.4 mag (Mar. 14, Ken-ichi Kadota). It will be observable at 16.5 mag in good condition in 2009 spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 16 59.68 31 50.3 2.685 3.066 102 16.7 4:39 (186, 23) Mar. 28 16 46.41 33 16.4 2.611 3.085 109 16.7 4:25 (180, 22) C/2008 N1 ( Holmes ) Although it had been low for a while, now it is getting higher. It will brighten up to 15 mag in 2009 and 2010, and will be observable for a long time in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 21 43.91 24 40.4 4.060 3.376 41 16.8 4:39 (243, -5) Mar. 28 21 45.64 26 19.5 3.965 3.338 45 16.7 4:45 (237, 0) 210P/2008 X4 ( Christensen ) First return of a bright new periodic comet discovered by SOHO spacecraft in 2003. Now it was re-discovered by STEREO-B spacecraft. It reached up to 6-7 mag in the SOHO images in late December, then it was observed around 10 mag in the morning sky in early January. Now it is fading. It was bright as 12.5 mag still on Feb. 5 (Michael Jager), but it has faded down to 15.4 mag on Mar. 1 (Ken-ichi Kadota). It keeps observable in good condition while fading gradually after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 15 11.36 3 29.5 0.808 1.652 132 16.8 3:18 (180, 52) Mar. 28 14 55.31 4 44.3 0.840 1.740 142 17.2 2:35 (180, 50) 2001 TX16 Peculiar asteroid moving along a cometary orbit. It will be observable around 17 mag in good condition for a long time until May. It will fade out very rapidly after May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 14 36.54 -3 59.1 1.173 2.046 141 16.9 2:43 (180, 59) Mar. 28 14 31.26 -3 43.7 1.173 2.092 148 16.9 2:10 (180, 59) 143P/Kowal-Mrkos It will reach to 17 mag at opposition in March. But then it will fade out soon, and will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 12 3.40 -7 43.9 1.611 2.602 172 17.0 0:10 (180, 63) Mar. 28 11 59.20 -7 10.0 1.600 2.592 171 17.0 23:34 (180, 62) C/2009 B2 ( LINEAR ) It will reach to 17 mag in March. But it will fade out soon, and will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 11 55.16 -12 30.6 1.350 2.332 167 17.0 0:04 (180, 68) Mar. 28 11 17.60 -10 10.1 1.371 2.339 161 17.1 22:50 (180, 65) C/2008 FK75 ( Lemmon-Siding Spring ) Now it is 17.4 mag (Feb. 21, Yasukazu Ikari). It will reach to 15 mag in 2010. It keeps observable for a long time after this in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 15 41.41 -3 20.2 5.660 6.284 124 17.2 3:48 (180, 58) Mar. 28 15 40.48 -2 28.7 5.540 6.248 131 17.2 3:19 (180, 58) P/2008 Y3 ( McNaught ) It keeps observable at 17.5 mag until spring. But it locates low in the Northern Hemispere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 8 13.15 -22 55.5 3.866 4.450 120 17.4 20:17 (180, 78) Mar. 28 8 12.85 -22 24.2 3.931 4.453 115 17.5 19:49 (180, 77) P/2008 Y2 ( Gibbs ) Brightening rapidly than expected. It reached up to 16.8 mag (Feb. 17, Yasukazu Ikari). It will be fading after this, and will be fainter than 18 mag in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 9 51.79 8 46.9 0.813 1.733 146 17.5 21:55 (180, 46) Mar. 28 9 53.90 7 51.9 0.868 1.756 140 17.7 21:30 (180, 47) 204P/2008 R5 ( LINEAR-NEAT ) At the discovery in 2001, it became much brighter after the perihelion passage. In this apparition, although it was so faint as 20 mag in early September, it brightened very rapidly, and it reached up to 16.3 mag (Feb. 5, Ken-ichi Kadota). It keeps observable in good condition for a while after this. But it will fade out rapidly after this. It has already faded down to 17.6 mag (Feb. 21, Yasukazu Ikari). It will be fainter than 18 mag in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 8 26.90 25 20.6 1.410 2.117 122 17.7 20:31 (180, 30) Mar. 28 8 32.77 25 3.4 1.496 2.140 116 17.9 20:09 (180, 30) C/2007 S2 ( Lemmon ) It was observed at 18 mag from autumn to winter in 2007. It will be observable again at 18 mag from winter to spring in 2009. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 10 20.43 -5 37.0 4.738 5.651 154 17.9 22:23 (180, 61) Mar. 28 10 18.23 -5 24.4 4.788 5.658 147 17.9 21:54 (180, 60) 17P/Holmes Great outburst occured in 2007 October, and it bacame a naked eye comet of 2 mag. It kept so bright as 5.5 mag still in 2008 spring (Apr. 30, Carlos Labordena), but it was extremely faint and difficult to see. The size was so large, the diameter was larger than 60 arcmin. Now it became observable in good condition again. The extremely faint large diffuse glow may be detected with a best sky condition, around 5-6 mag with a diameter of 1 or 2 degrees. Mitsunori Tsumura detected a possible glow of Comet Holmes on Nov. 4. Current brightness of the central core is 17.7 mag (Feb. 13, Catalina Sky Survey), much brighter than pre-outburst brightness still now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 8 16.59 25 47.8 3.814 4.397 119 19.3 20:20 (180, 29) Mar. 28 8 15.70 25 27.9 3.930 4.416 112 19.4 19:52 (180, 30) 173P/2005 T1 ( Mueller 5 ) It was observed bright at 16.5-17 mag from late 2006 to early 2007. However, it is fading after that, although it is getting closer to the sun. It was so faint as 19.4 mag around the perihelion passage in 2008 spring (Mar. 10, Mitsunori Tsumura). This comet was observed so faint around the perihelion passage in the previous apparition at the discovery. It faded out before the perihelion passage again in this apparition. No observations have been reported since 2008 April at all. At least, it is fainter than 20 mag now (Mar. 15, Leonid Elenin). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 21 11 32.25 24 12.7 3.487 4.408 154 21.9 23:35 (180, 31) Mar. 28 11 28.77 24 28.7 3.530 4.417 149 21.9 23:04 (180, 31)