Weekly Information about Bright Comets (2011 Sept. 10: South)

Japanese version Home page	Updated on September 13, 2011
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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/2009 P1 ( Garradd ) Now it is 6.9 mag (Sept. 3, Jakub Cerny). It keeps so bright as 6-8 mag for a long time from 2011 to 2012, and will be observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it keeps observable in good condition until October when it brightens up to 6.5 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 19 1.40 19 55.7 1.474 2.092 113 6.9 19:43 (180, 35) Sept.17 18 40.31 19 53.6 1.540 2.033 104 6.8 19:16 (174, 35) 45P/Honda-Mrkos-Pajdusakova It passed very near by the earth, within 0.1 A.U., and brightened up to 8.0 mag in the southern sky (Aug. 14, Willian Souza). In the Northern Hemisphere, it is appearing in the morning sky. It keeps observable while fading gradually after this. In the Southern Hemisphere, it is not observable until winter when it becomes fainter than 16 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 9 39.88 6 28.9 0.397 0.660 22 8.0 4:44 (262, 0) Sept.17 9 50.95 8 15.8 0.527 0.586 26 7.5 4:33 (260, 0) C/2010 X1 ( Elenin ) It has brightened faster than expected, and reached up to 8.1 mag in mid August (Aug. 19, Michael Mattiazzo). However, it turned to be fading and getting diffuse rapidly after that. Altnough it was expected to be a naked eye comet, the nucleus is disintegrating and the comet will disappear soon. It is not observable for a while in the Northern Hemisphere. It will be unobservable also in the Southern Hemisphere soon. After appearing in the morning sky in October, it becomes observable in the excellent condition at midnight. However, the comet can be already too faint to see. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 12 48.95 -5 41.1 0.730 0.483 26 10.1 19:10 ( 88, 8) Sept.17 12 47.04 -4 46.0 0.564 0.507 19 10.3 19:16 ( 84, 0) C/2010 G2 ( Hill ) Now it is 10.7 mag (Sept. 3, Jakub Cerny). It will brighten up to 10-11 mag in autumn. In the Northern Hemisphere, it keeps observable for a long time until 2012 spring. In the Southern Hemisphere, it is not observable until November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 7 56.79 54 1.3 2.233 1.983 62 10.7 4:44 (211,-13) Sept.17 7 53.19 53 0.2 2.132 1.989 68 10.6 4:33 (210,-10) C/2011 Q4 ( SWAN ) New comet discovered in the spacecraft images. Now it is so bright as 10.7 mag (Sept. 6, Chris Wyatt). In the Southern Hemisphere, it must have located high and been observable in excellent condition from spring to summer. It locates high still now. But it will be getting lower in the evening sky after this, and it will be unobservable in late September. In the Northern Hemisphere, it locates extremely low and hard to observe. It will appear in the morning sky at 15 mag in late November, then it will be observable while fading gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 14 14.22 -18 19.0 1.467 1.140 50 11.0 19:10 ( 89, 32) Sept.17 14 15.66 -14 42.7 1.630 1.127 43 11.1 19:16 ( 88, 24) P/1999 R1 = P/2003 R5 = P/2007 R5 ( SOHO ) It returned as predicted, and it was observed at 5-6 mag on Sept. 6. But it locates extremely close to the Sun, and it is not observable on the ground. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 11 5.12 6 40.7 1.124 0.124 2 11.6 4:44 (274,-17) Sept.17 11 50.80 0 26.7 1.406 0.410 4 21.6 19:16 ( 80,-14) C/2011 M1 ( LINEAR ) Extremely diffuse. It is faint as 15.0 mag by CCD observations (Aug. 20, Michael Jager). The central part is extremely faint as 18 mag. However, it was reported so bright as 9.5 mag visually (Aug. 26, Juan Jose Gonzalez). In the Northern Hemisphere, it keeps observable until winter, although it becomes very low from mid August to late September. In the Southern Hemisphere, it is not observable until November. It will keep the current brightness until autumn in calculation. However, it may be disintegrated in the near future. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 10 51.24 35 42.7 1.598 0.897 30 12.6 4:44 (245,-29) Sept.17 11 1.42 29 35.6 1.662 0.912 28 12.7 4:33 (250,-25) 73P/Schwassmann-Wachmann 3 It brightened up to 15.0 mag on July 10 (Ken-ichi Kadota). Now it is not observable. The condition of this apparition is bad. In the Northern Hemisphere, it is only observable from December to February in the evening very low sky after the perihelion passage. In the Southern Hemisphere, it keeps observable for a long time, although it keeps locating extremely low. The component B was not detected, fainter than 20 mag, on May 14 (Hidetaka Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 13 2.07 -3 14.2 1.850 1.084 28 12.8 19:10 ( 92, 10) Sept.17 13 25.50 -6 32.4 1.802 1.038 28 12.6 19:16 ( 88, 10) 78P/Gehrels 2 Already bright and visible visually at 12.6 mag (Sept. 1, Marco Goiato). It will be observable in good condition at 12 mag in autumn and winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 23 56.09 6 38.7 1.263 2.248 163 12.9 0:43 (180, 48) Sept.17 23 52.42 5 57.7 1.226 2.224 170 12.7 0:12 (180, 49) 213P/2009 B3 ( Van Ness ) First return of a new periodic comet which brightened up to 13 mag in a major outburst in 2005. Now it is bright as 11.8 mag (Sept. 1, Marco Goiato). It will be observable in an excellent condition from summer to winter. The fragment B is also observed at 19-20 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 22 54.99 4 33.1 1.213 2.211 169 13.3 23:37 (180, 50) Sept.17 22 49.56 4 31.9 1.236 2.225 166 13.4 23:05 (180, 50) C/2009 F4 ( McNaught ) Now it is so bright as 13.0 mag (Sept. 1, Hidetaka Sato). It keeps bright as 13-14 mag for a long time after this until 2013. It is not observable in the Northern Hemisphere, but it is observable in good condition in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 11 31.67 -74 58.9 5.598 5.518 80 13.5 19:10 ( 17, 30) Sept.17 11 39.35 -75 24.1 5.632 5.510 77 13.5 19:16 ( 16, 29) 27P/Crommelin It has returned after 27-year blank since 1984. It brightened very rapidly, and became very bright as 9.1 mag (July 10, Tsutomu Seki). However, it is not observable now. It will never be observable again in this apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 10 16.89 -5 20.4 1.932 1.015 17 13.6 4:44 (277, -1) Sept.17 10 41.71 -8 48.8 2.013 1.100 17 14.3 4:33 (281, 0) C/2006 S3 ( LONEOS ) Now it is 13.7 mag and visible visually (Sept. 2, Jakub Cerny). It will be observable at 13-14 mag for a long time from 2011 to 2012. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 18 9.54 -9 50.9 5.042 5.393 105 14.0 19:10 (170, 65) Sept.17 18 5.23 -10 17.1 5.153 5.378 97 14.0 19:16 (150, 62) C/2011 A3 ( Gibbs ) Now it is 13.5 mag, much brighter than originally expected (Aug. 20, Michael Jager). It keeps 14 mag from 2011 summer to 2012 summer. But it is not observable around the perihelion. It is observable in good condition in the Northern Hemisphere in 2011, and in the Southern Hemisphere in 2012. It was reported that it is very bright as 10.3 mag with a large coma of 6 arcmin visually (Aug. 26, Juan Jose Gonzalez). However, it looks very small by CCD images. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 14 34.66 6 34.3 3.102 2.582 50 14.1 19:10 (115, 22) Sept.17 14 45.98 4 54.8 3.123 2.551 47 14.1 19:16 (110, 19) (596) Scheila Big asteroid discovered in 1906. It suddenly showed the cometary activity on Dec. 11, probably due to an impact of a small object. It was very bright as 11.5 mag visually (Dec. 17, Juan Jose Gonzalez). It had a dust coma still on Jan. 9 (Joseph Brimacombe). Then it turned to be stellar at 13.8 mag (Apr. 5, Juan Jose Gonzalez). Now it is not observable. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 12 5.79 10 21.7 3.632 2.669 14 14.3 19:10 ( 96,-10) Sept.17 12 16.89 8 59.4 3.633 2.658 11 14.2 19:16 ( 91,-14) C/2011 Q2 ( McNaught ) New bright comet at 14.5 mag (Aug. 26, R. H. McNaught). It is observable in good condition in the Southern Hemisphere. But it will be getting lower, and will be unobservable in early November. It will brighten up to 11-12 mag in winter, however, it is not observable around the perihelion passage. In the Northern Hemisphere, it is not observable until 2012 summer, when it will be fainter than 15 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 14 16.94 -36 47.6 2.611 2.286 60 14.4 19:10 ( 69, 41) Sept.17 14 31.97 -36 13.5 2.608 2.215 56 14.2 19:16 ( 68, 37) 29P/Schwassmann-Wachmann 1 Now it is not observable. It will appear in the morning sky in early November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 11 36.11 -3 40.1 7.247 6.261 10 14.3 19:10 ( 80, -8) Sept.17 11 40.87 -4 13.3 7.258 6.261 6 14.3 19:16 ( 75,-13) C/2011 L3 ( McNaught ) It was very bright and visible visually as 12.4 mag in July and early August (Aug. 2, Jakub Koukal). Now it is fading, but still bright as 13.7 mag (Sept. 3, Jakub Cerny). In the Northern Hemisphere, it keeps observable at 14-15 mag in good condition until autumn. It locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 17 50.38 34 10.0 1.595 1.961 95 14.4 19:10 (172, 20) Sept.17 17 41.49 34 12.5 1.712 1.979 89 14.6 19:16 (163, 18) 62P/Tsuchinshan 1 It is not observable at all due to the bad condition in this apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 11 28.13 9 49.3 2.592 1.594 6 14.6 19:10 ( 90,-17) Sept.17 11 47.15 7 54.5 2.628 1.632 5 15.0 19:16 ( 86,-19) 71P/Clark It brightened up to 17.1 mag in late June (June 24, J. F. Hernandez). It will brighten up to 13 mag in winter. But the condition of this apparition is bad, and it will not be observable around the perihelion passage. It is already too low to observe in the Northern Hemisphere. It will be unobservable soon also in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 13 11.06 -4 31.3 2.597 1.815 31 15.1 19:10 ( 93, 12) Sept.17 13 26.37 -6 28.8 2.597 1.784 28 15.0 19:16 ( 88, 9) 48P/Johnson It brightened rapidly. Now it is bright and visible visually at 14.2 mag (Aug. 7, Alan Hale). It will be observable at 15 mag in good condition from July to October. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 20 13.84 -27 43.8 1.504 2.305 132 15.0 20:57 (180, 83) Sept.17 20 15.79 -28 4.8 1.565 2.303 125 15.1 20:32 (180, 83) C/2010 S1 ( LINEAR ) Brightening rapidly. Now it is visible visually at 13.6 mag (Sept. 3, Jakub Cerny). It is expected to be 13 mag and will be observable in good condition in 2013. In the Northern Hemisphere, it keeps observable for a long time after this. It is not observable in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 1 12.51 65 45.1 6.960 7.297 105 15.2 2:00 (180,-11) Sept.17 1 0.06 65 58.5 6.866 7.269 109 15.1 1:20 (180,-11) P/2010 JC81 ( WISE ) Appearing in the morning sky, it was revealed to be a comet. Now it is very bright as 14.7 mag (Aug. 1, G. V. Borisov, V. Rumyantsev). It has already passed the perihelion in April, and it will be fading after this. But it is still bright as 13.8 mag (Sept. 4, Sandor Szabo). In the Northern Hemisphere, it keeps observable in excellent condition for a long time until 2012 summer. It is not observable at all in the Southern Hemisphere. If the current brightness is temporal, it may fade out rapidly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 8 58.19 48 20.2 2.833 2.344 51 15.2 4:44 (222,-17) Sept.17 9 18.03 48 15.9 2.829 2.390 54 15.2 4:33 (222,-17) C/2010 M1 ( Gibbs ) It was expected to keep 14-15 mag for a long time from 2011 summer to 2012 summer. However, it is lost. It was observed only during two days in 2010 June. So the orbital elements are extremely uncertain. The condition is good in the Southern Hemisphere. But in the Northern Hemisphere, it is not observable until 2012 August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 15 37.10 -53 7.0 2.834 2.846 80 15.3 19:10 ( 45, 55) Sept.17 15 38.30 -53 43.2 2.885 2.802 75 15.3 19:16 ( 46, 51) C/2009 Y1 ( Catalina ) Now it is bright at 13.8 mag and visible visually (Sept. 2, Jakub Cerny). It will be fading slowly after this, and it will be fainter than 18 mag in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 22 41.58 -22 28.1 2.474 3.443 161 15.3 23:24 (180, 78) Sept.17 22 31.68 -24 54.4 2.567 3.490 152 15.5 22:46 (180, 80) 130P/McNaught-Hughes Now it is bright and visible visually at 14.5 mag (Aug. 29, Jakub Cerny). Brighter than originally predicted. It will be observable at 14-15 mag in good condition from summer to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 23 5.70 -19 49.6 1.188 2.177 165 15.8 23:48 (180, 75) Sept.17 23 1.55 -20 9.0 1.218 2.191 160 15.9 23:17 (180, 75) 49P/Arend-Rigaux It brightened rapidly and reached up to 14.3 mag (Aug. 25, Artyom Novichonok). It will be obserbale at 14 mag in good condition in autumn. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 6 54.92 8 38.0 1.630 1.488 63 15.9 4:44 (233, 30) Sept.17 7 17.29 8 39.5 1.582 1.468 64 15.8 4:33 (234, 29) 37P/Forbes Now it is 17.5 mag (Aug. 17, K. Hills). It is already unobservable in the Northern Hemisphere. It is getting lower in the evening sky, and will be too low to observe in late October also in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 13 42.68 -17 48.6 2.404 1.817 43 16.1 19:10 ( 85, 26) Sept.17 13 59.36 -19 5.2 2.413 1.785 41 15.9 19:16 ( 82, 23) C/2008 FK75 ( Lemmon-Siding Spring ) Now it is 15.8 mag (Aug. 16, Artyom Novichonok). It will be fading very slowly after this. In the Northern Hemisphere, it keeps observable for a long time until 2012 spring when it fades down to 17-18 mag. It will not be observable in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 22 36.41 51 31.5 4.676 5.289 122 16.1 23:19 (180, 3) Sept.17 22 33.30 50 43.8 4.677 5.318 125 16.1 22:48 (180, 4) 65P/Gunn It became bright as 12 mag in 2010. Now it is fading. It has already faded down to 16.8 mag (Aug. 2, J.F. Soulier and A. Novichonok). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 2 18.64 3 54.1 3.012 3.765 132 16.1 3:05 (180, 51) Sept.17 2 16.10 3 36.3 2.961 3.784 139 16.1 2:35 (180, 51) C/2010 B1 ( Cardinal ) It reached up to 14 mag in 2010 autumn and winter. Now it is fading. In the Southern Hemisphere, it keeps observable in good condition while fading gradually. In the Northern Hemisphere, it will never be observable again. It must be still bright, but no observations have been reported since May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 6 32.14 -53 58.3 3.611 3.622 82 16.2 4:44 (317, 57) Sept.17 6 34.61 -57 4.4 3.621 3.661 84 16.2 4:33 (324, 58) 174P/(60558) 2000 EC98 ( Echeclus ) It has brightened in outburst up to 14 mag in 2006 January. Another outburst occured in late May, and brightened up to 14.3 mag (June 4, Juan Jose Gonzalez). It was bright as 14.5 mag still on June 27 (Jakub Koukal). Recent brightness has not been reported. It will be getting lower in the evening sky after this, and will be unobservable in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 16 6.80 -16 41.4 8.427 8.245 76 16.3 19:10 (111, 54) Sept.17 16 8.90 -16 50.1 8.517 8.226 69 16.4 19:16 (104, 48) 115P/Maury Now it is 16.0 mag (Aug. 19, J. F. Hernandez). It is visible visually at 15.0 mag (Aug. 23, Jakub Cerny). It will brighten up to 16 mag from summer to autumn, and will be observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 17 3.48 -10 8.0 1.802 2.049 88 16.5 19:10 (138, 59) Sept.17 17 15.29 -11 4.6 1.863 2.042 85 16.5 19:16 (129, 57) C/2011 L2 ( McNaught ) Now it is 16.6 mag (July 22, Hidetaka Sato). In the Southern Hemisphere, it keeps observable at 16-17 mag for a long time from summer to winter. It is not observable in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 14 20.77 -73 59.9 1.884 2.047 84 16.5 19:10 ( 19, 41) Sept.17 14 6.08 -71 50.9 1.973 2.022 78 16.5 19:16 ( 22, 38) 21P/Giacobini-Zinner Now it is 17.0 mag (Aug. 27, Artyom Novichonok). It will reach up to 10 mag from January to March, but it will be too low to observe. It will be getting lower in the evening sky. In the Northern Hemisphere, it keeps observable until December when it brightens up to 12 mag. In the Southern Hemisphere, it is observable only until October when it becomes 15 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 15 39.78 7 48.8 2.361 2.168 66 16.8 19:10 (129, 32) Sept.17 15 48.09 6 46.1 2.367 2.106 62 16.6 19:16 (123, 29) C/2011 R1 ( McNaught ) New comet. Now it is 16.3 mag (Sept. 4, Siding Spring Survey). It is expected to be observable at 13 mag for a long time from 2012 summer to 2013 summer. It will be observable in excellent condition in the Southern Hemisphere. But it is not observable at brightest time in the Northern Hemisphere. It keeps observable for a while at 16 mag while brightening gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 3 0.37 -16 38.6 4.366 4.985 122 16.7 3:47 (180, 72) Sept.17 2 56.99 -18 21.6 4.245 4.933 128 16.6 3:16 (180, 73) C/2011 O1 ( LINEAR ) Now it is 16.5 mag (Aug. 1, Hidetaka Sato). In the Southern Hemisphere, it keeps observable at 16-17 mag for a long time from 2011 to 2013. In the Northern Hemisphere, it is only observable until October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 17 6.72 -21 56.5 4.748 4.869 90 16.8 19:10 (121, 68) Sept.17 17 7.21 -22 46.3 4.831 4.834 84 16.8 19:16 (109, 63) C/2008 S3 ( Boattini ) Now it is 16.6 mag (Aug. 29, Artyom Novichonok). It keeps observable at 17 mag for a long time from 2011 to 2012. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 0 28.54 18 11.2 7.152 8.038 149 16.8 1:15 (180, 37) Sept.17 0 22.98 17 48.5 7.109 8.042 156 16.8 0:42 (180, 37) C/2006 W3 ( Christensen ) It reached up to 7.7 mag in 2009 summer (2009 Aug. 13, Chris Wyatt). Now it is fading. It has already faded down to 15.3 mag (June 29, Hidetaka Sato). It will never be observable again in the Northern Hemisphere. It will be very low in autumn in the Southern Hemisphere. No observations have been reported since July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 15 19.15 -59 12.3 7.646 7.549 80 17.3 19:10 ( 37, 51) Sept.17 15 20.44 -58 52.1 7.786 7.596 75 17.4 19:16 ( 38, 47) 9P/Tempel 1 Although the condition is bad in this apparition, it brightened up to 12.8 mag in last winter (Dec. 24, Ken-ichi Kadota). Now it is fading. It has already faded down to 16.5 mag (Aug. 21, P. Dupouy, P. A. Mahe). It will be fainter than 18 mag in late September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 0 5.61 -17 33.7 1.620 2.597 161 17.4 0:53 (180, 72) Sept.17 23 58.44 -18 5.6 1.657 2.636 163 17.6 0:18 (180, 73) P/2011 N1 New comet discovered by de la Cueva, et al., Spain. Now it is 17.3 mag (Aug. 22, J. L. Ortiz, N. Morales, I. de la Cueva). It keeps 17-18 mag until early 2013. It keeps observable in good condition until early 2012 in the Southern Hemisphere, although it locates low in the Northern Hemisphere. In the Northern Hemisphere, it will be observable in good condition from 2012 autumn to early 2013. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 1 12.43 -45 57.1 2.693 3.445 131 17.5 1:59 ( 0, 79) Sept.17 1 8.05 -46 34.3 2.666 3.418 131 17.5 1:27 ( 0, 79) 74P/Smirnova-Chernykh Now it is 16.5 mag (July 2, J. F. Hernandez). It was observed around 16 mag in 2009 and 2010. In 2011, it keeps observable at 17 mag from spring to autumn. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 17 0.41 -24 17.5 4.140 4.254 89 17.7 19:10 (114, 69) Sept.17 17 4.32 -24 25.7 4.254 4.263 83 17.7 19:16 (105, 63) 2010 GM163 Peculiar asteroid moving along a cometary orbit. It will pass the perihelion in winter. But it will never be brighter than 18 mag. It becomes observable in good condition in September in the Southern Hemisphere. It locates low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 0 18.82 -36 12.6 2.371 3.251 145 17.9 1:06 ( 0, 89) Sept.17 0 15.38 -37 2.4 2.368 3.239 144 17.9 0:35 ( 0, 88) 2000 EJ37 Peculiar asteroid moving along a cometary orbit. Now it is 17.5 mag (Aug. 1, Siding Spring Survey)。It is observable at 17-18 mag in good condition from September to November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 3 15.54 12 1.0 1.850 2.475 116 17.9 4:02 (180, 43) Sept.17 3 14.61 11 20.8 1.826 2.530 124 17.9 3:33 (180, 44) 242P/2010 P3 ( Spahr ) Now it is 18.3 mag (Aug. 31, W. Hasubick). It will be observable in good condition at 18 mag from autumn to winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.10 3 29.55 -4 47.9 3.549 4.088 115 18.0 4:16 (180, 60) Sept.17 3 30.53 -5 49.5 3.464 4.081 121 17.9 3:49 (180, 61)