Weekly Information about Bright Comets (2013 May 25: North)

Japanese version Home page	Updated on May 29, 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/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 8.0 mag (May 18, Uwe Pilz). It is observable all night in the Northern Hemisphere. It is not observable in the Southern Hemisphere for a while after this. The Earth will pass through the comet's orbital plane on May 27, then the dust tail will look dense and straight. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 21 6.61 84 35.8 1.767 1.720 70 8.0 3:08 (183, 40) June 1 17 20.41 84 31.3 1.849 1.836 73 8.3 0:49 (180, 40) 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 6.8 mag (May 19, Uwe Pilz). In the Northern Hemisphere, it will be getting higher gradually, then it keeps observable in good condition while fading gradually. In the Southern Hemisphere, it keeps locating low in the morning sky after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 0 20.93 27 55.3 1.737 1.361 51 8.1 3:08 (253, 26) June 1 0 20.64 33 24.2 1.746 1.461 56 8.7 3:03 (250, 33) C/2012 L2 ( LINEAR ) Now it is so bright as 10.5 mag (May 19, Chris Wyatt). 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) May 25 5 46.11 0 56.3 2.295 1.524 31 12.1 20:45 (101,-14) June 1 6 0.70 -1 49.4 2.310 1.541 31 12.2 20:52 (102,-20) 46P/Wirtanen It brightens up to 10 mag in summer. But 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) May 25 2 59.57 11 32.0 2.129 1.214 18 12.7 3:08 (246,-13) June 1 3 25.94 13 54.0 2.089 1.172 18 12.2 3:03 (243,-12) C/2006 S3 ( LONEOS ) It brightened up to 11-12 mag in 2012. Now it is bright as 10.8 mag (May 10, 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) May 25 13 46.56 -12 9.8 5.098 5.959 145 12.9 21:33 ( 0, 43) June 1 13 39.85 -11 41.9 5.204 5.985 136 13.0 20:59 ( 0, 43) 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) May 25 19 59.98 -28 43.3 2.223 2.947 127 13.0 3:08 (350, 26) June 1 20 0.11 -29 31.0 2.162 2.955 133 12.9 3:03 (355, 25) C/2010 S1 ( LINEAR ) Now it is 13.0 mag (May 17, Chris Wyatt). 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) May 25 21 9.79 32 51.8 5.812 5.900 90 13.4 3:08 (267, 67) June 1 21 5.65 33 5.0 5.720 5.900 95 13.4 3:03 (270, 72) C/2013 E2 ( Iwamoto ) Now it is bright as 13.1 mag (May 17, Chris Wyatt). 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) May 25 0 0.65 10 10.6 2.057 1.781 59 13.6 3:08 (273, 22) June 1 0 14.02 10 48.5 2.058 1.840 63 13.7 3:03 (273, 24) C/2011 R1 ( McNaught ) Now it is bright as 12.9 mag (May 12, Carlos Labordena). It keeps observable at 11-13 mag for a long time from 2012 summer to 2013 summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 13 43.76 17 9.1 2.506 3.232 128 13.6 21:30 ( 0, 72) June 1 13 35.68 18 23.8 2.659 3.289 120 13.8 20:55 ( 0, 73) 29P/Schwassmann-Wachmann 1 Now it is faint as 14.3 mag (May 5, Toshiyuki Takahashi). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 13 39.78 -21 60.0 5.351 6.215 145 13.6 21:27 ( 0, 33) June 1 13 37.86 -21 41.7 5.414 6.214 138 13.6 20:57 ( 0, 33) 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) May 25 4 29.46 32 59.9 2.834 1.862 13 14.0 20:45 (137, -6) June 1 4 46.32 31 15.8 2.797 1.805 9 13.8 20:52 (139, -9) C/2012 S1 ( ISON ) Now it is 15.5 mag (May 15, M.-T. Hui, X. Gao). 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. It became unobservable in late May. 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) May 25 6 54.35 28 31.5 4.332 3.596 38 14.2 20:45 (114, 15) June 1 6 59.29 28 14.3 4.312 3.505 33 14.1 20:52 (118, 10) C/2011 J2 ( LINEAR ) Now it is 14.1 mag (May 10, Juan Jose Gonzalez). It keeps 13 mag and observable in good condition in the Northern Hemisphere for a long time from 2013 to 2014. 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) May 25 8 59.11 50 16.1 4.313 3.963 63 14.2 20:45 (129, 45) June 1 8 59.13 50 14.7 4.375 3.933 57 14.2 20:52 (130, 39) 117P/Helin-Roman-Alu 1 Now it is 14.4 mag (Apr. 30, Taras Prystavski). 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) May 25 14 13.32 -9 53.0 2.469 3.387 150 14.5 22:00 ( 0, 45) June 1 14 9.91 -9 54.0 2.508 3.374 143 14.5 21:29 ( 0, 45) (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. It locates high in the Southern Hemisphere. But it still locates very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 0 13.71 -13 13.0 3.110 2.864 66 14.6 3:08 (290, 5) June 1 0 21.91 -12 45.5 3.037 2.876 71 14.6 3:03 (292, 8) C/2012 K6 ( McNaught ) Now it is 14.2 mag (May 2, Yasukazu Ikari). 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) May 25 13 30.16 -30 17.4 2.484 3.353 143 14.9 21:17 ( 0, 25) June 1 13 18.55 -27 0.3 2.558 3.354 135 14.9 20:52 ( 4, 28) C/2012 K1 ( PanSTARRS ) Now it is 14.4 mag (May 2, Yasukazu Ikari). 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) May 25 16 53.27 20 38.7 4.904 5.687 136 15.0 0:44 ( 0, 76) June 1 16 46.00 21 6.5 4.840 5.622 136 14.9 0:09 ( 0, 76) 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 14.3 mag (May 10, Taras Prystavski). 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) May 25 1 54.87 -42 23.6 2.637 2.485 70 15.0 3:08 (304,-29) June 1 2 11.98 -42 20.1 2.658 2.542 72 15.1 3:03 (304,-28) 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) May 25 3 42.68 -25 29.0 7.240 6.588 46 15.0 3:08 (274,-43) June 1 3 46.48 -24 59.1 7.244 6.616 48 15.1 3:03 (276,-39) 63P/Wild 1 Emmanuel Jehin detected the small outburst on May 15. Now it is bright and visible visually at 12.6 mag (May 17, Chris Wyatt). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 10 26.53 5 47.0 1.681 1.999 92 15.2 20:45 ( 59, 44) June 1 10 36.43 3 41.8 1.762 2.015 88 15.4 20:52 ( 62, 39) C/2009 P1 ( Garradd ) It kept as bright as 6-7 mag for a long time from 2011 summer to 2012 spring. Now it is fading. But it is bright as 15.9 mag still now (Apr. 13, Ken-ichi Kadota). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 8 12.31 -7 5.8 6.269 5.936 66 15.3 20:45 ( 73, 11) June 1 8 14.28 -7 7.0 6.423 5.996 60 15.4 20:52 ( 78, 4) C/2013 F3 ( McNaught ) Now it is 17.2 mag (Apr. 11, Hidetaka Sato). It keeps 16 mag and observable in good condition until July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 18 57.26 6 43.9 1.464 2.252 129 15.9 2:48 ( 0, 62) June 1 18 43.13 12 13.2 1.431 2.253 133 15.8 2:06 ( 0, 67) C/2012 S3 ( PanSTARRS ) Now it is 16.7 mag (May 23, A. Diepvens). 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) May 25 22 5.66 21 26.4 2.479 2.558 82 16.0 3:08 (279, 51) June 1 22 2.99 20 40.7 2.322 2.525 89 15.9 3:03 (285, 56) P/2012 B1 ( PanSTARRS ) Now it is bright as 15.6 mag (Apr. 29, Taras Prystavski). It will be observable at 15-16 mag for a long time from 2013 to 2014. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 11 48.30 5 35.1 3.355 3.840 111 16.2 20:45 ( 33, 56) June 1 11 49.83 5 8.7 3.445 3.837 105 16.2 20:52 ( 44, 52) 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. It will be observabel at 16 mag again in 2013 summer. Now it is 18.1 mag, fainter than this ephemeris (Apr. 11, Hidetaka Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 22 27.03 -17 25.4 3.354 3.532 91 16.3 3:08 (311, 21) June 1 22 31.15 -17 25.5 3.271 3.548 97 16.2 3:03 (315, 24) P/2012 F2 ( PanSTARRS ) Now it is 17.5 mag (Mar. 16, Hidetaka Sato). 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) May 25 18 52.97 -8 25.5 2.083 2.916 138 16.4 2:43 ( 0, 47) June 1 18 51.33 -7 39.3 2.039 2.923 144 16.4 2:14 ( 0, 47) C/2011 O1 ( LINEAR ) Now it is 16.1 mag (Mar. 4, Hidetaka Sato). In the Southern Hemisphere, it will be observable at 15-16 mag in good condition for a long time until summer. It is not observable at all in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 4 17.75 -44 31.0 4.897 4.570 65 16.5 20:45 ( 60,-51) June 1 4 27.17 -43 42.2 4.924 4.601 65 16.6 3:03 (298,-52) C/2012 X1 ( LINEAR ) It is expected to brighten up to 11 mag and become observable in excellent condition in 2014 spring. Now it is 16.8 mag (Apr. 17, A. Klotz, F. Kugel, J. Caron). In the Northern Hemisphere, it keeps observable in good condition until early summer. It locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 8 50.96 39 36.6 4.026 3.670 62 16.7 20:45 (115, 42) June 1 8 57.15 39 15.6 4.044 3.604 57 16.6 20:52 (116, 36) C/2012 V1 ( PanSTARRS ) It is expected to brighten rapidly and to be observable at 15 mag in good condition from July to August. It has not been observed since January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 0 8.40 20 58.6 2.610 2.198 55 17.0 3:08 (261, 26) June 1 0 4.38 21 29.2 2.450 2.174 62 16.8 3:03 (264, 31) 257P/2012 F4 ( Catalina ) Now it is 17.2 mag (May 15, W. Hasubick). 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) May 25 23 0.51 13 6.6 2.192 2.131 73 16.9 3:08 (279, 36) June 1 23 12.04 14 30.9 2.127 2.129 76 16.8 3:03 (280, 39) P/2005 L1 ( McNaught ) First return of a new periodic comet discovered in 2005. It will be observable at 17 mag for a long time from 2013 to 2014. However, it has not been recovered yet. Not it is fainter than 19.5 mag (Feb. 21, Martin Masek). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 17 11.35 -12 53.7 2.278 3.259 162 17.0 1:02 ( 0, 42) June 1 17 6.77 -12 48.8 2.252 3.252 168 17.0 0:30 ( 0, 42) 184P/Lovas 2 It has not been observed yet in this apparition. But it must have been already brightened up to 17.5 mag. It is expected to be bright as 16 mag and observable in good condition from summer to autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 23 18.89 -3 27.8 1.496 1.568 74 17.3 3:08 (291, 22) June 1 23 39.25 -1 8.8 1.429 1.535 75 17.1 3:03 (290, 24) 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 17.7 mag (May 19, J. Linder). 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) May 25 13 53.47 52 39.5 1.400 1.877 100 17.5 21:40 (180, 72) June 1 13 44.86 52 44.3 1.362 1.789 96 17.2 21:04 (180, 72) 91P/Russell 3 It was observed around 20 mag in 2012 spring. But it has not been observed recently. It will be observable at 17.5 mag from spring to summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 18 26.40 -17 3.9 1.760 2.667 146 17.2 2:17 ( 0, 38) June 1 18 22.93 -16 18.4 1.726 2.675 154 17.2 1:46 ( 0, 39) C/2013 G2 ( McNaught ) Now it is 16.9 mag (May 19, Hidetaka Sato). 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) May 25 19 27.92 -29 23.9 2.100 2.898 134 17.2 3:08 (357, 26) June 1 19 12.80 -27 42.3 2.068 2.950 144 17.3 2:36 ( 0, 27) C/2013 J2 ( McNaught ) Now it is 17.6 mag (May 9, Siding Spring Survey). It is observable at 16.5 mag in good condition from July to September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 21 18.52 -14 30.5 1.987 2.470 106 17.4 3:08 (325, 33) June 1 21 24.99 -13 3.5 1.897 2.451 110 17.3 3:03 (328, 36) C/2012 C1 ( McNaught ) Now it is 17.0 mag (Mar. 4, Hidetaka Sato). 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) May 25 2 14.31 -62 15.8 4.876 4.913 86 17.4 3:08 (326,-37) June 1 2 16.42 -62 58.4 4.829 4.922 89 17.3 3:03 (327,-35) C/2013 K1 ( Christensen ) It approached to the Sun down to 0.94 A.U. on May 30. However, because the comet is very tiny, it brightens only up to 17.5 mag. However, A. Diepvens reported it was so bright as 15.3 mag on May 19. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 23 53.12 12 48.6 0.832 0.948 60 17.4 3:08 (271, 25) June 1 0 30.26 8 6.7 0.838 0.945 60 17.4 3:03 (273, 19) C/2013 G6 ( Lemmon ) Now it is 16.4 mag (May 5, Hiroshi Abe). It brightens up to 17 mag in May and June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 13 4.71 -18 24.2 1.322 2.176 137 17.5 20:50 ( 0, 37) June 1 12 34.87 -18 35.1 1.413 2.150 123 17.6 20:52 ( 17, 35) 2009 DL26 Peculiar asteroid discovered in 2009. It was observed only during 9 days, then it became lost. In calculation, it passes the perihelion in 2014 July and brightens up to 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 16 20.83 -21 57.8 3.790 4.801 176 17.5 0:12 ( 0, 33) June 1 16 17.23 -21 50.9 3.768 4.780 175 17.5 23:36 ( 0, 33) 125P/Spacewatch Now it is 17.3 mag (May 21, Hidetaka Sato). It will be fading after this, and will be fainter than 18 mag in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 22 2.49 -4 1.5 1.434 1.791 92 17.6 3:08 (307, 35) June 1 22 11.11 -3 29.9 1.400 1.825 96 17.9 3:03 (310, 38) 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) May 25 22 25.49 -23 4.8 2.334 2.610 94 17.9 3:08 (315, 17) June 1 22 32.95 -22 23.9 2.202 2.561 98 17.7 3:03 (318, 20) C/2013 J3 ( McNaught ) Now it is 17.2 mag (May 10, Siding Spring Survey). Now it is brightest, and will be fading after this. It locates low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 12 38.40 -31 51.5 3.309 4.062 132 17.7 20:45 ( 5, 23) June 1 12 33.79 -29 17.1 3.399 4.074 125 17.8 20:52 ( 14, 24) C/2010 R1 ( LINEAR ) Now it is 17.8 mag (May 2, Toshiyuki Takahashi). It brightened up to 16.5 mag in 2012. It will be observable in good condition again at 17.5 mag in 2013 spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 12 28.88 10 4.6 5.684 6.225 118 17.7 20:45 ( 17, 64) June 1 12 24.14 10 4.9 5.818 6.246 110 17.8 20:52 ( 36, 61) 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. It locates high in the Southern Hemisphere. But it has not been recovered yet. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 0 37.85 -19 2.0 3.534 3.237 64 17.8 3:08 (291, -3) June 1 0 47.31 -18 42.0 3.425 3.205 69 17.7 3:03 (293, 0) 197P/LINEAR It was faint as 18.5 mag on Apr. 10, but brightened in outburst up to 16.1 mag on Apr. 16 (Hidetaka Sato). It has already faded down to 18.5 mag (May 14, Hidetaka Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 0 42.71 -20 3.2 1.385 1.319 64 17.8 3:08 (291, -4) June 1 1 1.40 -19 25.2 1.406 1.371 66 18.2 3:03 (291, -3) C/2013 G7 ( McNaught ) Now it is 17.3 mag (Apr. 16, Siding Spring 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 2012 July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 14 48.57 -16 33.7 4.269 5.236 160 17.8 22:35 ( 0, 38) June 1 14 40.52 -16 54.2 4.292 5.212 152 17.8 21:59 ( 0, 38) P/2013 G1 ( Kowalski ) Now it is 18.2 mag (Apr. 16, Hidetaka Sato). 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) May 25 15 19.24 -16 29.1 2.610 3.606 167 17.9 23:06 ( 0, 38) June 1 15 15.79 -16 7.4 2.621 3.592 160 17.8 22:35 ( 0, 39) 174P/(60558) 2000 EC98 ( Echeclus ) 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) May 25 19 18.47 -17 32.9 5.919 6.672 134 18.0 3:08 ( 0, 37) June 1 19 17.05 -17 32.8 5.830 6.657 141 17.9 2:40 ( 0, 37) 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) May 25 22 26.55 8 26.2 9.177 9.100 82 17.9 3:08 (290, 39) June 1 22 25.13 8 33.5 9.077 9.119 89 17.9 3:03 (295, 44) C/2013 H1 ( La Sagra ) Now it is 17.8 mag (Apr. 21, Catalina Sky Survey). It brightens up to 18 mag at best in May and June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 14 48.41 11 55.3 1.751 2.623 141 17.9 22:35 ( 0, 67) June 1 14 45.47 10 15.4 1.780 2.622 137 17.9 22:05 ( 0, 65) C/2011 KP36 ( Spacewatch ) It is expected to brighten up to 14 mag from 2015 to 2016. Now it is 18.4 mag (Apr. 8, Hidetaka Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 17 58.10 -2 19.5 7.972 8.840 147 18.0 1:49 ( 0, 53) June 1 17 56.17 -2 12.2 7.896 8.805 152 17.9 1:19 ( 0, 53) 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 (May 5, iTelescope Observatory). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 17 52.51 -48 54.1 2.112 2.999 144 18.4 1:44 ( 0, 6) June 1 17 45.92 -49 9.5 2.050 2.968 149 18.3 1:10 ( 0, 6) 98P/Takamizawa It was predicted to be already 15-16 mag. But actually, it is 18.1 mag, much fainter than predicted by 3-4 mag (May 5, Catalina Sky Survey). It was expected to brighten up to 14 mag and to be observable in excellent condition in summer. However, it can be fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 25 15 2.43 3 18.0 0.865 1.818 151 18.9 22:49 ( 0, 58) June 1 14 58.97 2 37.4 0.861 1.793 145 18.7 22:18 ( 0, 58)