Weekly Information about Bright Comets (2013 May 11: South)

Japanese version Home page	Updated on May 12, 2013
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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/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 6.9 mag (May 8, Katsumi Yoshimoto). 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 11 0 19.00 16 43.6 1.719 1.165 41 7.0 5:17 (236, 15) May 18 0 20.29 22 21.7 1.728 1.263 46 7.5 5:21 (227, 16) 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 7.9 mag (May 11, Juan Jose Gonzalez). 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 11 23 48.40 75 27.6 1.621 1.477 63 7.3 5:17 (192,-25) May 18 23 6.56 80 39.6 1.691 1.600 67 7.7 5:21 (185,-27) C/2012 L2 ( LINEAR ) Now it is so bright as 9.6 mag (May 9, 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 11 5 17.34 6 19.5 2.255 1.509 32 12.1 18:35 (108, 14) May 18 5 31.67 3 39.0 2.277 1.514 31 12.1 18:31 (104, 14) 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 11 14 1.83 -13 11.5 4.936 5.907 162 12.8 22:43 (180, 68) May 18 13 53.92 -12 39.9 5.008 5.933 153 12.9 22:08 (180, 68) 246P/2010 V2 ( NEAT ) It brightened up to 12 mag in 2012. It is bright as 12.2 mag still now (Mar. 23, Marco Goiato). It keeps 12-14 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 11 19 56.16 -27 21.1 2.367 2.932 114 13.0 4:41 (180, 82) May 18 19 58.65 -27 59.9 2.292 2.939 120 13.0 4:16 (180, 83) C/2011 R1 ( McNaught ) Now it is bright as 11.6 mag (May 3, Uwe Pilz). 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 11 14 4.71 13 30.9 2.241 3.120 144 13.2 22:46 (180, 41) May 18 13 53.45 15 32.5 2.366 3.176 136 13.4 22:07 (180, 39) 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 11 2 10.73 6 38.2 2.229 1.312 18 13.7 5:17 (261, 1) May 18 2 34.52 9 5.8 2.176 1.261 18 13.2 5:21 (258, 1) C/2013 E2 ( Iwamoto ) Now it is bright as 12.1 mag (May 10, 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 11 23 30.78 8 32.2 2.045 1.671 54 13.3 5:17 (233, 29) May 18 23 46.24 9 25.1 2.053 1.725 56 13.4 5:21 (229, 31) C/2010 S1 ( LINEAR ) Now it is 12.9 mag (May 11, Juan Jose Gonzalez). 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 11 21 15.88 32 15.9 5.997 5.900 79 13.5 5:17 (190, 22) May 18 21 13.20 32 35.1 5.905 5.900 84 13.4 5:21 (182, 22) 29P/Schwassmann-Wachmann 1 Now it is faint, but visible visually at 14.3 mag (Apr. 16, Alan Hale). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 13 44.80 -22 38.2 5.263 6.217 159 13.6 22:27 (180, 78) May 18 13 42.11 -22 19.0 5.301 6.216 152 13.6 21:57 (180, 77) C/2012 V2 ( LINEAR ) Now it is 14.4 mag (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 11 3 55.38 36 4.7 2.895 1.983 20 14.3 18:35 (121,-19) May 18 4 12.47 34 35.8 2.867 1.921 16 14.1 18:31 (119,-19) 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. It locates extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 9 2.32 50 17.6 4.169 4.026 74 14.1 18:35 (172, 4) May 18 9 0.14 50 17.4 4.244 3.995 68 14.2 18:31 (168, 3) C/2012 S1 ( ISON ) Now it is 15.4 mag (May 4, Hiroshi Abe). 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 11 6 46.08 29 4.5 4.340 3.773 50 14.5 18:35 (140, 12) May 18 6 49.93 28 48.1 4.341 3.685 44 14.4 18:31 (136, 10) 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 11 14 22.02 -10 2.2 2.426 3.414 165 14.5 23:04 (180, 65) May 18 14 17.41 -9 55.9 2.441 3.401 158 14.5 22:32 (180, 65) (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. Appearing in the morning sky again in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 23 55.98 -14 21.1 3.245 2.841 57 14.6 5:17 (259, 40) May 18 0 5.06 -13 45.1 3.179 2.852 62 14.6 5:21 (254, 44) 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. It was expected to be 9-10 mag, but actually, it is much fainter as 13.8 mag (Apr. 16, Artyom Novichonok). 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 11 1 17.34 -42 39.7 2.602 2.376 65 14.7 5:17 (301, 36) May 18 1 36.65 -42 30.5 2.618 2.430 68 14.8 5:21 (300, 38) 63P/Wild 1 It brightened up to 11.0 mag in 2013 spring (Mar. 30, Juan Jose Gonzalez). Now it is fading, but still bright as 12.2 mag (May 1, Marco Goiato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 10 8.54 10 4.8 1.525 1.973 100 14.8 18:52 (180, 45) May 18 10 17.19 7 54.7 1.601 1.985 96 15.0 18:33 (180, 47) 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 11 14 0.43 -36 55.8 2.410 3.354 155 14.8 22:41 ( 0, 88) May 18 13 44.13 -33 38.8 2.434 3.353 150 14.8 21:58 (180, 88) 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 11 3 34.83 -26 42.5 7.210 6.533 44 15.0 18:35 ( 66, 12) May 18 3 38.78 -26 3.5 7.229 6.561 45 15.0 5:21 (296, 8) 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 11 17 6.54 19 24.1 5.076 5.815 133 15.2 1:52 (180, 36) May 18 17 0.16 20 4.2 4.983 5.751 135 15.1 1:18 (180, 35) 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 15.2 mag still now (Mar. 4, Sandor Szabo). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 8 9.44 -7 12.8 5.947 5.816 77 15.1 18:35 (134, 54) May 18 8 10.69 -7 7.7 6.111 5.876 71 15.2 18:31 (127, 50) 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 11 19 18.39 -3 45.5 1.600 2.258 118 16.1 4:04 (180, 59) May 18 19 9.04 1 20.3 1.521 2.253 124 15.9 3:27 (180, 54) 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 11 11 47.48 6 14.7 3.188 3.847 124 16.1 20:30 (180, 49) May 18 11 47.51 5 57.2 3.268 3.843 117 16.1 20:03 (180, 49) C/2012 S3 ( PanSTARRS ) Now it is 17.2 mag (Apr. 16, M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann). 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 11 22 6.88 22 27.4 2.779 2.628 70 16.4 5:17 (205, 28) May 18 22 6.89 22 1.0 2.631 2.592 76 16.2 5:21 (197, 31) 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 11 22 16.75 -17 38.8 3.520 3.500 80 16.3 5:17 (240, 61) May 18 22 22.22 -17 30.0 3.437 3.516 86 16.3 5:21 (230, 65) 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 11 18 53.24 -10 7.0 2.198 2.906 125 16.5 3:39 (180, 65) May 18 18 53.63 -9 15.1 2.136 2.911 131 16.4 3:11 (180, 64) 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 11 3 57.85 -46 28.0 4.841 4.510 65 16.5 18:35 ( 50, 25) May 18 4 7.97 -45 26.3 4.869 4.540 65 16.5 18:31 ( 50, 23) 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 11 8 40.98 40 13.0 3.974 3.802 72 16.8 18:35 (166, 13) May 18 8 45.55 39 55.7 4.003 3.736 67 16.7 18:31 (163, 12) 257P/2012 F4 ( Catalina ) Now it is 18.3 mag (Apr. 11, Hidetaka Sato). It is expected to be observable at 16 mag in good condition in summer and autumn. But it is fainter than predicted recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 22 36.30 10 10.5 2.322 2.137 66 17.0 5:17 (219, 36) May 18 22 48.58 11 39.6 2.257 2.133 69 16.9 5:21 (213, 37) 125P/Spacewatch Now it is 17.2 mag (Apr. 25, K. Hills). 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 11 21 41.42 -5 26.7 1.500 1.727 84 17.0 5:17 (212, 56) May 18 21 52.58 -4 40.8 1.467 1.758 88 17.3 5:21 (203, 58) 197P/LINEAR Now it is unusually bright in outburst. It was faint as 18.5 mag on Apr. 10, but brightened up to 16.1 mag on Apr. 16 (Hidetaka Sato). It has faded down to 17.6 mag on Apr. 22(iTelescope Observatory). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 23 59.83 -21 27.0 1.334 1.225 61 17.1 5:17 (268, 43) May 18 0 22.22 -20 44.6 1.361 1.271 62 17.4 5:21 (265, 44) 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 11 17 18.87 -13 10.9 2.367 3.274 148 17.2 2:05 (180, 68) May 18 17 15.44 -13 1.3 2.316 3.266 155 17.1 1:34 (180, 68) C/2013 G2 ( McNaught ) New comet. Now it is 16.9 mag (Apr. 16, 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 11 19 53.91 -32 20.5 2.210 2.797 115 17.2 4:39 (180, 87) May 18 19 41.73 -30 56.4 2.149 2.847 124 17.2 4:00 (180, 86) 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 11 18 30.00 -18 36.7 1.858 2.652 132 17.3 3:15 (180, 74) May 18 18 28.81 -17 50.3 1.804 2.659 139 17.3 2:47 (180, 73) 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 11 2 8.78 -61 18.8 4.966 4.895 80 17.4 5:17 (325, 33) May 18 2 11.72 -61 42.6 4.922 4.903 83 17.4 5:21 (325, 36) C/2013 G6 ( Lemmon ) New comet. 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 11 14 17.79 -16 59.3 1.241 2.237 167 17.5 22:57 (180, 72) May 18 13 39.66 -17 54.7 1.262 2.205 151 17.4 21:52 (180, 73) 175P/Hergenrother Now it is bright as 15.9 mag (May 1, Catalina Sky Survey). It keeps observable in good condition at 16-17 mag until June. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 9 47.73 19 16.3 1.626 1.949 92 17.5 18:35 (179, 36) May 18 9 59.30 18 17.5 1.689 1.947 88 17.5 18:31 (175, 37) 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 11 22 39.30 -7 48.1 1.646 1.641 71 17.7 5:17 (235, 50) May 18 22 58.92 -5 41.2 1.568 1.604 73 17.5 5:21 (229, 50) 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 11 12 40.33 9 51.2 5.444 6.183 133 17.6 21:22 (180, 45) May 18 12 34.28 10 0.1 5.558 6.204 125 17.7 20:49 (180, 45) 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 11 16 27.60 -22 9.5 3.875 4.844 161 17.8 1:14 (180, 77) May 18 16 24.33 -22 4.1 3.825 4.822 169 17.7 0:43 (180, 77) 273P/2012 V4 ( Pons-Gambart ) Long-lost comet for almost 200 years since 1827. Finally re-discovered by Rob Matson from SWAN images of mid November. Now it is fading, but still bright as 14.1 mag (Apr. 30, Taras Prystavski). In the Northern Hemisphere, it keeps observable in excellent condition while fading after this. In the Southern Hemisphere, it keeps locating extremely low after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 11 11 30.75 45 50.3 2.034 2.411 99 17.7 20:12 (180, 9) May 18 11 19.04 43 17.6 2.223 2.498 93 18.2 19:34 (180, 12) C/2013 G5 ( Catalina ) New comet. 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 18.6 mag (Apr. 13, Catalina Sky Survey). 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 11 14 13.11 51 11.4 1.478 2.053 109 18.0 22:54 (180, 4) May 18 14 3.10 52 8.7 1.438 1.965 105 17.7 22:17 (180, 3) C/2013 G7 ( McNaught ) New comet. 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 11 15 5.32 -15 51.5 4.276 5.285 177 17.9 23:47 (180, 71) May 18 14 56.90 -16 12.9 4.263 5.260 169 17.9 23:11 (180, 71) P/2013 G1 ( Kowalski ) New comet. 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 11 15 26.73 -17 15.7 2.628 3.636 176 17.9 0:13 (180, 72) May 18 15 22.95 -16 52.2 2.612 3.621 175 17.9 23:37 (180, 72) C/2013 H1 ( La Sagra ) New comet. 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 11 14 56.10 14 39.2 1.725 2.632 147 17.9 23:38 (180, 40) May 18 14 52.02 13 23.9 1.732 2.627 145 17.9 23:06 (180, 42) 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 11 18 1.40 -47 59.9 2.268 3.059 134 18.6 2:47 ( 0, 77) May 18 17 57.73 -48 30.3 2.185 3.029 139 18.5 2:16 ( 0, 77) 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 11 15 11.07 3 41.7 0.898 1.875 158 19.2 23:53 (180, 51) May 18 15 6.62 3 39.2 0.877 1.846 155 19.0 23:21 (180, 51)