Weekly Information about Bright Comets (2013 July 6: North)

Japanese version Home page	Updated on July 7, 2013
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

C/2012 F6 ( Lemmon ) It approached to the sun down to 0.73 A.U. on Mar. 24, and brightened up to 4.7 mag (Mar. 11, Michael Mattiazzo). Now it is fading. But it is still bright as 9.1 mag (July 4, D. Sidorko). In the Northern Hemisphere, it keeps observable in good condition 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) July 6 23 46.49 58 28.2 1.855 1.952 79 8.7 3:06 (208, 61) July 13 23 26.84 62 29.3 1.895 2.048 83 8.9 3:12 (193, 61) 46P/Wirtanen The condition is worst and the comet will be hardly observable in this apparition. In the Northern Hemisphere, it will be observable in autumn when the comet will be fainter than 16 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 5 55.78 22 37.0 2.003 1.053 14 10.3 3:06 (235, -8) July 13 6 27.91 23 20.6 2.009 1.053 14 10.2 3:12 (235, -7) C/2011 L4 ( PanSTARRS ) It passed the perihelion on Mar. 10, and brightened up to 0-1 mag. Now it is fading. But it is still bright as 10.1 mag (July 1, Juan Jose Gonzalez). It is observable all night in the Northern Hemisphere. In the Southern Hemisphere, it will be observable in the extremely low sky from mid August to mid September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 14 30.46 64 9.6 2.357 2.380 78 10.6 21:02 (161, 58) July 13 14 31.47 60 26.1 2.477 2.482 78 10.9 20:58 (153, 59) 26P/Grigg-Skjellerup Brightening very rapidly near the perihelion as predicted. Now it is 13.9 mag and already visible visually (July 3, Chris Wyatt). It is expected to reach up to 12 mag in the evening sky from July to August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 10 52.45 7 57.0 1.214 1.086 57 13.3 21:02 ( 89, 16) July 13 11 22.81 7 41.1 1.209 1.090 57 12.5 20:58 ( 88, 17) C/2012 L2 ( LINEAR ) Now it is so bright as 11.2 mag (July 3, Con Stoitsis). In the Southern Hemisphere, it keeps observable for a long time until the comet fades out, although it keeps locating low. It will never be observable again in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 7 17.91 -16 38.6 2.362 1.707 39 12.7 21:02 ( 99,-42) July 13 7 34.52 -19 48.2 2.376 1.753 41 12.8 20:58 ( 97,-45) C/2012 V2 ( LINEAR ) It brightened up to 14.4 mag until April (Apr. 13, Sandor Szabo). It will brighten up to 12 mag from summer to autumn. Now it is not observable. In the Southern Hemisphere, it will become observable in August, then it keeps observable while fading gradually. It will never be observable again in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 6 9.09 20 1.0 2.548 1.569 12 13.0 3:06 (235,-12) July 13 6 25.45 17 8.1 2.489 1.535 15 12.8 3:12 (240,-11) 246P/2010 V2 ( NEAT ) It brightened up to 12 mag in 2012. It is bright as 14.1 mag still now (May 19, Chris Wyatt). It keeps 13-14 mag until autumn. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 19 44.00 -33 51.5 2.007 3.001 165 12.9 0:49 ( 0, 21) July 13 19 38.55 -34 36.0 2.012 3.012 167 13.0 0:17 ( 0, 20) C/2012 S1 ( ISON ) It is expected to be a great comet in 2013 autumn when the comet approaches to the sun down to only 0.01 A.U. It keeps visible with naked eyes from November to January, and can be extremely bright as Venus or more at the highlight. However, the brightening has declined at 15.5 mag from January through May in 2013. Now it is not observable. The condition is excellent in the Northern Hemisphere. It will appear in the morning sky again in late August, then it keeps observable almost all through the period of brightening, at the highlight, and of fading. The condition is not good in the Southern Hemisphere. It is not observable at all the latter part of the highlight, and it keeps low all through the period. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 7 30.66 26 34.6 4.039 3.035 7 13.4 21:02 (134,-11) July 13 7 38.09 26 10.7 3.949 2.937 4 13.2 20:58 (136,-13) C/2010 S1 ( LINEAR ) Now it is 11.8 mag (July 3, Gabor Santa). It keeps bright at 13-14 mag for a long time until 2014. It keeps observable for a long time in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 20 34.77 32 41.8 5.332 5.909 120 13.2 1:40 ( 0, 88) July 13 20 27.09 32 12.7 5.281 5.912 124 13.2 1:05 ( 0, 87) C/2006 S3 ( LONEOS ) It brightened up to 11-12 mag in 2012. Now it is bright as 11.0 mag (June 3, Juan Jose Gonzalez). It keeps observable in good condition until July in the Northern Hemisphere, or until September in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 13 17.10 -10 9.8 5.901 6.121 97 13.3 21:02 ( 48, 30) July 13 13 14.64 -10 1.7 6.057 6.149 90 13.3 20:58 ( 54, 26) 29P/Schwassmann-Wachmann 1 Now it is 12.2 mag and visible visually (July 3, Con Stoitsis). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 13 35.66 -20 37.8 5.857 6.208 105 13.8 21:02 ( 37, 25) July 13 13 36.74 -20 32.6 5.963 6.207 99 13.8 20:58 ( 42, 22) C/2011 J2 ( LINEAR ) Now it is 14.5 mag (June 11, Sandor Szabo). It keeps 13 mag and observable in good condition in the Northern Hemisphere for a long time from 2013 to 2014. But it locates low in July and August. In the Southern Hemisphere, it is not observable until 2014 autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 9 11.65 50 27.2 4.544 3.790 37 14.1 21:02 (139, 19) July 13 9 16.10 50 37.2 4.545 3.764 35 14.0 20:58 (141, 17) (596) Scheila Big asteroid discovered in 1906. It suddenly showed the cometary activity on Dec. 11, 2010, probably due to an impact of a small object. It has already turned to be stellar. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 0 54.21 -11 47.9 2.649 2.934 95 14.4 3:06 (311, 28) July 13 0 58.50 -11 54.7 2.571 2.946 101 14.3 3:12 (317, 32) C/2013 E2 ( Iwamoto ) Now it is bright as 13.5 mag (June 12, Sandor Szabo). It keeps locating in the morning sky for a long time after this. I will keep the current brightness for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 1 4.35 11 57.8 2.010 2.165 84 14.4 3:06 (288, 43) July 13 1 10.89 11 46.1 1.992 2.233 89 14.5 3:12 (294, 48) C/2012 K1 ( PanSTARRS ) Now it is 14.2 mag and visible visually (June 11, Sandor Szabo). It is expected to brighten up to 5-6 mag in 2014 autumn. In 2013, it keeps observable in good condition until autumn when it brigthens up to 13-14 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 16 9.09 21 28.5 4.723 5.294 119 14.6 21:10 ( 0, 76) July 13 16 2.65 21 9.9 4.735 5.228 113 14.6 20:58 ( 20, 75) C/2012 S3 ( PanSTARRS ) Now it is 15.3 mag (June 12, Catalina Sky Survey). It is expected to brighten up to 14 mag in July and August. In the Southern Hemisphere, it keeps observable for a long time until the comet fades out. It keeps observable in good condition until September also in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 21 17.93 11 3.7 1.588 2.394 132 14.8 2:23 ( 0, 66) July 13 21 0.76 7 10.8 1.480 2.374 143 14.6 1:39 ( 0, 62) 117P/Helin-Roman-Alu 1 Now it is 14.2 mag (July 2, Chris Wyatt). It keeps bright as 13-14 mag for a long time from 2013 to 2014. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 14 6.03 -11 5.4 2.833 3.310 109 14.6 21:02 ( 36, 36) July 13 14 8.03 -11 32.5 2.914 3.298 103 14.7 20:58 ( 41, 33) C/2011 R1 ( McNaught ) It kept bright as 11-13 mag for a long time from 2012 summer to 2013 summer. It will be fading after this. Now it is 14.3 mag (June 11, Sandor Szabo). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. In the Southern Hemisphere, it becomes low in late August, then it will be hardly observable. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 13 16.82 20 57.2 3.509 3.577 85 14.8 21:02 ( 80, 51) July 13 13 16.46 21 1.7 3.680 3.636 79 14.9 20:58 ( 84, 47) C/2009 F4 ( McNaught ) Now it is 14.1 mag (Mar. 5, Hidetaka Sato). It will be fading slowly after this. But it keeps 15 mag in 2013. It becomes temporarily low in May, but will be observable in good condition again after June in the Southern Hemisphere. It is not observable now in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 4 2.96 -23 34.7 7.153 6.757 63 15.1 3:06 (290,-13) July 13 4 5.52 -23 30.1 7.116 6.786 67 15.2 3:12 (293, -8) C/2013 G5 ( Catalina ) It will approach to the Sun down to 0.9 A.U., and to the Earth down to 0.4 A.U. in September. Then it is expected to brighten up to 11-12 mag. Now it is 17.2 mag (May 29, Taras Prystavski). It looks diffuse. In the Northern Hemisphere, it keeps observable in good condition until mid September while brightening rapidly. In the Southern Hemisphre, it keeps locating low for a while. However, it will getting higher after August, and it keeps observable in good condition after that, until the comet fades out. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 13 32.01 47 24.9 1.121 1.355 78 15.6 21:02 (125, 60) July 13 13 36.52 45 17.0 1.056 1.275 75 15.2 20:58 (121, 57) C/2012 K6 ( McNaught ) Now it is 14.0 mag and visible visually (June 11, Sandor Szabo). It reaches up to 14-15 mag from spring to summer. It is observable in excellent condition 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) July 6 12 49.96 -14 13.4 3.169 3.380 93 15.4 21:02 ( 51, 23) July 13 12 48.55 -12 29.9 3.314 3.389 85 15.6 20:58 ( 57, 20) C/2012 V1 ( PanSTARRS ) It is expected to brighten rapidly and to be observable at 15 mag in good condition from July to August. But actually, it is not detected, fainter than 20 mag (May 19, Hidetaka Sato). It can have been already disintegrated. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 23 4.22 23 1.0 1.589 2.098 105 15.7 3:06 (307, 72) July 13 22 38.04 22 26.8 1.435 2.093 116 15.5 3:12 (356, 78) C/2013 G6 ( Lemmon ) It brightened very rapidly. Now it is so bright as 15.2 mag (June 21, Hidetaka Sato). It keeps observable in good condition for a while in the Southern Hemipshere. It will be unobservable in late June in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 11 17.44 -19 5.9 2.068 2.062 75 15.6 21:02 ( 63, 4) July 13 11 11.17 -19 28.1 2.202 2.054 68 15.7 20:58 ( 67, -2) C/2011 F1 ( LINEAR ) It brightened up to 9.0 mag in 2012 autumn (Nov. 4, Juan Jose Gonzalez). However, it faded out unexpectedly around the perihelion passage. Now it is fainter than originally predicted by 4-5 mag. Now it is 15.2 mag (June 3, Hidetaka Sato). In the Southern Hemisphere, it keeps observable in good condition while fading slowly after this. In the Northern Hemisphere, it will not be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 3 20.75 -43 21.9 2.773 2.837 83 15.7 3:06 (312,-17) July 13 3 31.06 -43 52.7 2.797 2.897 85 15.8 3:12 (315,-13) P/2013 J2 ( McNaught ) Now it is 16.3 mag (June 18, Catalina Sky Survey). It brightens up to 15.5 mag and will be observable in excellent condition from summer to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 21 40.38 -5 18.2 1.334 2.196 137 16.0 2:45 ( 0, 50) July 13 21 39.70 -3 48.0 1.280 2.183 143 15.9 2:17 ( 0, 51) P/1998 U3 ( Jager ) First return of a new periodic comet discovered in 1998. It brightened up to 10 mag at the discovery. In the Northern Hemisphere, it keeps observable in excellent condition from autumn to spring. It locates somewhat low in the Southern Hemisphere. It has not been recovered yet. It was fainter than 19.5 mag on Jan. 2 (Michael Jager). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 3 41.84 35 19.3 3.744 3.105 44 16.2 3:06 (242, 23) July 13 3 53.91 36 1.4 3.642 3.065 48 16.0 3:12 (243, 27) 154P/Brewington Not observed yet in this apparition. It will brighten very rapidly near the perihelion passage. It is expected to reach up to 10 mag from autumn to winter. In the Northern Hemipshere, it keeps observable in excellent condition until the comet fades out. In the Southern Hemisphere, it keeps observable in good condition within 2013, but it will not be observable in 2014. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 22 59.44 -19 17.3 1.585 2.317 124 16.5 3:06 (344, 34) July 13 23 1.74 -18 43.3 1.476 2.270 130 16.3 3:12 (352, 36) P/2012 F2 ( PanSTARRS ) Now it is 16.5 mag (Apr. 14, J. F. Hernandez). It keeps observable in good condition at 17 mag from spring to summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 18 34.01 -5 11.2 1.987 2.968 161 16.4 23:35 ( 0, 50) July 13 18 30.29 -5 2.3 2.013 2.980 157 16.4 23:04 ( 0, 50) P/2012 B1 ( PanSTARRS ) Now it is 14.6 mag and visible visually (June 11, Sandor Szabo). It will be observable at 14-16 mag for a long time from 2013 to 2014. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 12 7.22 2 2.9 3.926 3.826 76 16.5 21:02 ( 72, 27) July 13 12 12.33 1 17.1 4.020 3.826 71 16.5 20:58 ( 75, 23) 63P/Wild 1 Now it is fading. It has already faded down to 15.4 mag (June 23, Hidetaka Sato). It will be unobservable in July in the Northern Hemisphere. It will be fainter than 18 mag in August also in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 11 31.88 -6 11.4 2.202 2.126 72 16.5 21:02 ( 71, 15) July 13 11 43.79 -8 3.5 2.294 2.154 69 16.8 20:58 ( 71, 11) 257P/2012 F4 ( Catalina ) Now it is 17.1 mag (June 8, Ken-ichi Kadota). It is expected to be observable at 16 mag in good condition in summer and autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 0 1.68 20 21.3 1.802 2.143 94 16.6 3:06 (291, 60) July 13 0 9.45 21 10.7 1.738 2.150 99 16.6 3:12 (297, 65) C/2011 O1 ( LINEAR ) Now it is 16.1 mag (Mar. 4, Hidetaka Sato). In the Southern Hemisphere, it keeps observable in good condition for a long time while fading gradually. It is not observable at all in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 5 8.54 -41 16.2 5.031 4.762 69 16.8 3:06 (300,-34) July 13 5 15.53 -41 6.2 5.044 4.796 70 16.8 3:12 (302,-29) P/2005 L1 ( McNaught ) First return of a new periodic comet discovered in 2005. It was expected to be observable at 17 mag for a long time from 2013 to 2014. However, it has not been recovered yet. Actually, it is much fainter than predicted, fainter than 20.5 mag (June 8, Danilo Pivato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 16 44.86 -13 13.3 2.322 3.219 146 17.0 21:46 ( 0, 42) July 13 16 42.20 -13 28.7 2.372 3.214 139 17.0 21:16 ( 0, 41) P/1998 Y2 ( Li ) First return of a new periodic comet discovered in 1998. It is expected to be observable at 15.5 mag in good condition from 2013 autumn to early 2014. However, it has not been recovered yet, although it locates high in the Southern Hemisphere. Actually, it seems to be much fainter than predicted, fainter than 19.5 mag (June 20, Martin Masek). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 1 31.09 -18 12.4 2.872 3.050 90 17.1 3:06 (308, 17) July 13 1 38.79 -18 23.0 2.764 3.020 94 17.0 3:12 (313, 21) C/2012 C1 ( McNaught ) Now it is 17.4 mag (June 15, K. Hills). It keeps 17 mag for a long time from 2012 to 2013, and will be observable in good condition in the Southern Hemisphere. It is not observable at all in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 2 12.55 -68 40.8 4.621 4.980 104 17.3 3:06 (339,-23) July 13 2 6.52 -70 9.1 4.594 4.993 107 17.3 3:12 (343,-22) C/2012 A2 ( LINEAR ) It was observed at 15-16 mag in 2012. Now it is fading. It has already faded down to 16.4 mag (June 8, A. Diepvens). It will be fainter than 18 mag in autumn. It locates low in the Southern Hemisphere. By the way, a few visual observers reported it was so bright as 10-11 mag in 2012. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 2 17.73 38 56.4 4.549 4.158 61 17.4 3:06 (245, 40) July 13 2 17.62 38 47.9 4.476 4.190 67 17.4 3:12 (248, 46) 174P/(60558) 2000 EC98 ( Echeclus ) Now it is 17.4 mag (June 29, Jean-Francois Soulier). It has brightened in outburst up to 14 mag twice, in 2006 January and 2011 May. It will pass the perihelion in 2015. It keeps observable at 17 mag for a long time after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 19 5.25 -17 48.0 5.569 6.582 174 17.5 0:11 ( 0, 37) July 13 19 2.45 -17 53.4 5.558 6.568 172 17.5 23:36 ( 0, 37) C/2012 S4 ( PanSTARRS ) It was observed at 18 mag in 2012. It will be observable at 17 mag in excellent condition in 2013. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 0 39.46 17 42.7 4.267 4.349 87 17.5 3:06 (286, 51) July 13 0 37.44 16 56.7 4.140 4.350 95 17.5 3:12 (295, 57) 152P/Helin-Lawrence It brightened up to 15.5 mag in 2012 summer. Although it has already passed the perihelion, it tends to become brightest after the perihelion passage. Now it is 18.6 mag, fainter than this ephemeris (June 20, A. Maury, J. F. Soulier). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 22 39.70 -18 42.1 2.905 3.630 128 17.5 3:06 (349, 36) July 13 22 38.81 -19 11.8 2.850 3.647 135 17.5 3:12 (359, 36) P/1819 W1 ( Blanpain ) It was discovered in 1819, and re-discovered in 2003. Although it was predicted to be extremely faint as 26 mag, it unusually brightened up to 17.5 mag in outburst (July 6, Hidetaka Sato). It will pass the perihelion in 2014 August, and will approach to the sun down to 0.96 a.u. The brightness is predicted to be 23 mag at best. However, if the cometary activity continues, it may be observed brighter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 19 41.48 -26 45.0 2.873 3.878 169 17.6 0:47 ( 0, 28) July 13 19 34.64 -27 6.1 2.831 3.844 174 17.9 0:13 ( 0, 28) C/2013 F3 ( McNaught ) Now it is 17.4 mag (June 21, Mt. Lemmon Survey). Although it was 16.5 mag in May, it is fading very rapidly after that. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 17 15.44 32 35.0 1.628 2.303 119 17.6 22:15 ( 0, 88) July 13 17 0.06 34 28.4 1.720 2.320 113 17.9 21:33 ( 0, 90) 102P/Shoemaker 1 Now it is 18.1 mag (June 13, Mt. Lemmon Survey). It is brighter than originally expected by 1 mag. It will brighten up to 16.5 mag and will be observable in good condition from summer to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 0 21.81 -1 1.5 1.596 2.026 99 17.8 3:06 (310, 41) July 13 0 27.65 1 17.1 1.513 2.013 103 17.6 3:12 (316, 47) C/2012 Q1 ( Kowalski ) Because it is a very distant comet, it will be fading very slowly. It keeps observable at 17.5 mag in 2013. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 23 25.39 11 22.9 9.410 9.752 106 17.8 3:06 (316, 60) July 13 23 25.28 11 19.1 9.313 9.759 113 17.7 3:12 (331, 64) C/2011 KP36 ( Spacewatch ) Now it is 17.7 mag (June 10, P. Lindner). It is expected to brighten up to 14 mag from 2015 to 2016. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 17 45.15 -2 7.4 7.717 8.631 152 17.8 22:46 ( 0, 53) July 13 17 43.08 -2 13.1 7.721 8.597 147 17.8 22:17 ( 0, 53) C/2013 G2 ( McNaught ) Now it is 16.7 mag (June 8, Ken-ichi Kadota). It will be fading after this. It locates low in the Northern Hempshere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 17 55.92 -17 50.1 2.219 3.210 164 17.8 22:56 ( 0, 37) July 13 17 43.97 -16 0.6 2.317 3.264 154 18.0 22:17 ( 0, 39) C/2008 S3 ( Boattini ) It has been observed at 17 mag for a long time from 2009 to 2012. It is also observable at 18 mag in good condition in 2013. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 22 12.51 8 36.8 8.619 9.219 123 17.8 3:06 (354, 64) July 13 22 8.95 8 29.5 8.548 9.239 130 17.8 2:46 ( 0, 64) C/2013 G7 ( McNaught ) Now it is 17.4 mag (June 8, Catalina Sky Survey). It keeps 17-18 mag for a long time from 2013 to 2014. It keeps observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it is only observable until 2013 July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 14 8.95 -18 42.6 4.620 5.095 112 17.9 21:02 ( 31, 30) July 13 14 4.89 -19 7.6 4.715 5.073 104 17.9 20:58 ( 37, 27) P/2013 G1 ( Kowalski ) Now it is 17.6 mag (June 3, Mt. Lemmon Survey). It keeps 18 mag for a long time from 2013 to 2014. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 15 7.62 -15 2.6 2.835 3.515 124 17.9 21:02 ( 16, 38) July 13 15 8.45 -15 1.7 2.904 3.502 118 18.0 20:58 ( 23, 37) 17P/Holmes It brightened up to 2 mag by unusual major outburst in 2007. It was observed around aphelion at 22 mag. It will return in 2014. It will be 14 mag at best by normal prediction. Now it is 17.0 mag, a bit brighter than this ephemeris (June 13, A. Maury, J. F. Soulier). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 17 5.85 -47 27.5 1.914 2.817 146 18.0 22:07 ( 0, 8) July 13 16 59.80 -46 33.1 1.922 2.787 141 17.9 21:34 ( 0, 8) C/2012 K8 ( Lemmon ) It keeps observable at 18 mag for a long time from 2013 to 2016. It keeps locating high in the Northern Hemisphere. It keeps locating very low in the Southern Hemipshere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 19 34.14 25 52.5 6.319 7.025 130 18.0 0:39 ( 0, 81) July 13 19 28.06 26 18.1 6.288 7.007 131 17.9 0:06 ( 0, 81) 98P/Takamizawa It was expected to be bright as 14 mag and observable in excellent condition in summer. But actually, it is so faint as 17.8 mag, much fainter than expected by 4 mag (June 12, Katsumi Yoshimoto). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 15 4.07 -4 48.0 0.944 1.701 120 18.5 21:02 ( 21, 48) July 13 15 10.45 -6 47.5 0.976 1.690 116 18.5 20:58 ( 26, 45) 91P/Russell 3 It was predicted to be 17 mag. But actually, it is much fainter, 19.0 mag (June 3, Hidetaka Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 17 58.35 -13 12.7 1.739 2.726 162 18.6 22:59 ( 0, 42) July 13 17 54.14 -12 49.2 1.779 2.738 155 18.6 22:28 ( 0, 42) 184P/Lovas 2 Although it was expected to be bright as 16 mag, actually it was so faint as 20.4 mag, fainter than expected by 4-5 mag (June 4, Cerro Tololo-LCOGT B). It will be observable in good condition from summer to autumn, however, it will be only 20 mag at best. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 6 1 26.09 10 47.7 1.179 1.417 80 18.9 3:06 (285, 38) July 13 1 48.08 13 0.4 1.144 1.405 80 18.8 3:12 (285, 41)