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It passed only 0.036 a.u. from the earth on Mar. 21-22, and brightened up to 3.9 mag (Mar. 21, Thomas Lehmann). It keeps brightening even after the perihelion passage. It is very bright as 5.9 mag still now (Apr. 9, Marco Goiato). It keeps observable in good condition after this both in the Northern Hemisphere and Southern Hemisphere. It may fade out very rapidly. The orbital elements are similar to those of P/2016 BA14 ( PanSTARRS ).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 17 33.26 -0 15.9 0.116 1.055 114 5.8 4:24 (180, 55)
Apr. 16 17 30.09 4 25.7 0.156 1.090 120 6.9 3:53 (180, 51)
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Now it is very bright as 8.7 mag (Feb. 14, Thomas Lehmann). It brightened temporarily in outburst in early January, but it returned to the original brightness. It will pass close to the earth from spring to summer, and it is expected to brighten up to 5-6 mag. Now it is appearing in the morning sky. In the Southern Hemisphere, it keeps observable in excellent condition after this. In the Northern Hemisphere, it locates low in the south.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 23 33.71 2 3.3 2.165 1.326 24 7.2 4:55 (264, 5)
Apr. 16 23 32.67 0 59.1 2.051 1.316 32 7.1 5:00 (260, 12)
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Now it is so bright as 9.5 mag (Apr. 6, Neil Norman). It will be fading slowly after this. It is observable in excellent condition in the Northern Hemisphere. It is not observable now in the Southern Hemisphere, but it will be observable after May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 32.49 60 55.8 2.020 2.527 108 9.7 22:19 (180, -6)
Apr. 16 11 18.10 57 17.3 2.095 2.571 106 9.8 21:37 (180, -2)
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It will graze the surface of the sun on Apr. 10. It passed only 0.16 a.u. from the earth on Mar. 13, and it was observable in excellent condition. However, it was not visible, fainter than 19 mag (Mar. 17, Jean-Francois Soulier).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 0 53.57 8 8.2 0.923 0.108 4 10.2 4:55 (270,-15)
Apr. 16 2 45.18 11 16.4 1.053 0.303 16 14.9 18:58 (101, -4)
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Now it is 10.0 mag (Apr. 6, Neil Norman). It was expected to brighten up to 4-5 mag from autumn to winter. But actually, it was 6 mag at best. Now it is fading rapidly. It is not observable after this in the Southern Hemisphere. It will be extremely low from May to June also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 4 30.06 48 53.7 2.847 2.477 58 11.2 19:07 (146, -8)
Apr. 16 4 35.97 48 12.9 3.035 2.565 53 11.5 18:58 (144, -9)
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First return of an object discovered as an asteroid 2007 VA85 in 2007. It brightened very rapidly since mid February, and now it is so bright as 12.6 mag (Mar. 28, Thomas Lehmann). It is alreay unobservable in the Southern Hemisphere. It will be unobservable in late April also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 3 21.31 34 4.5 1.682 1.117 39 11.5 19:07 (126, -8)
Apr. 16 3 16.69 35 57.9 1.805 1.128 34 12.0 18:58 (125,-13)
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Now it is 11.7 mag (Apr. 9, Seiichi Yoshida). It will brighten up to 11 mag from spring to summer. In the Northern Hemisphere, it will be getting lower after this, and will be unobservable in June. It locates somewhat low in the Southern Hemisphere, but it keeps observable until August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 6 7.60 22 40.2 1.919 1.877 72 12.2 19:07 (147, 25)
Apr. 16 6 21.51 22 46.7 1.953 1.844 68 12.2 18:58 (146, 24)
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Now it is 12.2 mag (Apr. 8, Seiichi Yoshida). It keeps 12-13 mag for a long time from 2015 autumn to 2016 summer. In the Northern Hemispehre, it keeps observable in good condition for a long time. It keeps unobservable until July in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 20 11.45 69 11.4 2.718 2.688 77 12.2 4:55 (191,-17)
Apr. 16 19 56.30 70 16.0 2.705 2.698 78 12.2 5:00 (187,-16)
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Now it is 14.0 mag (Mar. 30, Sandor Szabo). Brightening very rapidly. It will be observable at 11 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 52.78 20 59.5 0.977 1.889 145 12.9 22:40 (180, 34)
Apr. 16 11 47.17 20 40.2 0.975 1.854 139 12.6 22:07 (180, 34)
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Now it is 13.8 mag (Apr. 8, Seiichi Yoshida). It keeps 13 mag for a while. It is observable in excellent condition in the Southern Hemisphere. But it locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 16 0.12 -22 57.5 1.439 2.274 136 13.2 2:51 (180, 78)
Apr. 16 15 58.61 -23 11.3 1.399 2.288 143 13.2 2:22 (180, 78)
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Now it is bright as 12.7 mag (Mar. 30, Sandor Szabo). Although it was faint as 19.0 mag in January (Jan. 10, B. Lutkenhoner), it brightened rapidly in February. It keeps observable until May in the Northern Hemisphere, or until July in the Southern Hemisphere. But it keeps extremely low. The brightness differs in every apparition. It was not observed in the last apparition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 3 40.28 15 54.8 1.819 1.189 37 13.6 19:07 (115, 7)
Apr. 16 4 8.98 16 42.4 1.834 1.203 37 13.7 18:58 (117, 8)
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It is observable in excellent condition in the Southern Hemisphere. Now it is 16.5 mag (Mar. 30, Jean-Francois Soulier).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 19 49.65 -25 28.5 5.955 5.947 84 13.7 4:55 (254, 65)
Apr. 16 19 51.99 -25 23.3 5.842 5.945 91 13.6 5:00 (244, 71)
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Now it is 14.6 mag (Apr. 8, Seiichi Yoshida). It is observable at 14-15 mag in good condition from winter to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 13 9.34 -11 42.4 1.346 2.346 175 14.6 0:01 (180, 67)
Apr. 16 13 0.92 -12 34.4 1.346 2.342 170 14.5 23:20 (180, 68)
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It will brighten up to 11 mag from summer to autumn. It will appear in the morning sky in summer, but it keeps low for some time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 0 14.40 12 21.4 2.910 1.959 14 14.8 4:55 (261, -9)
Apr. 16 0 30.74 13 50.4 2.851 1.911 16 14.6 5:00 (258, -7)
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Now it is 15.4 mag (Mar. 15, Yuji Ohshima). It will be observable at 14 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 20 5.56 -14 54.4 2.419 2.436 79 14.8 4:55 (241, 56)
Apr. 16 20 16.15 -14 19.9 2.337 2.432 83 14.7 5:00 (233, 60)
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Now it is 15.1 mag (Jan. 2, Ken-ichi Kadota). Distant object, but it keeps observable at 14-15 mag for a long time from 2015 to 2016. It becomes unobservable temporarily from January to March in the Southern Hemisphere, or from February to April in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 23 33.56 -1 14.6 5.777 4.896 25 14.7 4:55 (267, 7)
Apr. 16 23 40.40 -0 45.4 5.725 4.892 31 14.7 5:00 (262, 12)
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Now it is 16.0 mag (Mar. 2, Hiroshi Abe). It will brighten up to 14 mag in summer. But it is not observable at the highlight. It will be unobservable soon.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 3 19.98 12 0.8 2.835 2.054 31 15.0 19:07 (109, 5)
Apr. 16 3 35.49 13 5.9 2.858 2.040 29 14.9 18:58 (109, 4)
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It is not observable now. It will appear in the morning sky in summer, but it will be fainter than 17 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 2 2.83 3 54.5 2.986 2.024 13 15.1 19:07 ( 91, -5)
Apr. 16 2 17.73 5 16.8 3.043 2.068 11 15.3 18:58 ( 92, -7)
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It is not observable now. It will appear in the morning sky in June. But the comet will be faint as 16-17 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 0 38.83 0 58.1 3.200 2.223 10 15.1 4:55 (274, -8)
Apr. 16 0 51.90 2 15.8 3.227 2.265 13 15.3 5:00 (270, -4)
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Now it is 15.7 mag (Mar. 30, Sandor Szabo). It is expected to brighten up to 7 mag in 2017 summer. In the Northern Hemisphere, it keeps observable in good condition until the highlight while the comet will be brightening. In the Southern Hemisphere, it is not observable until early 2017.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 6 46.56 60 37.6 5.197 5.125 80 15.7 19:07 (169, -7)
Apr. 16 6 50.44 60 6.0 5.222 5.063 75 15.6 18:58 (167, -8)
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It brightened very rapidly in 2015 spring, and reached up to 13.8 mag (May 11, Sandor Szabo). It is bright as 14.2 mag still now (Mar. 11, Yasukazu Ikari). It keeps 15 mag for a while until spring. It is observable in excellent condition in the Southern Hemisphere. But it locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 14 4.41 -30 4.7 3.130 4.056 154 15.8 0:56 (180, 85)
Apr. 16 14 0.62 -29 51.0 3.127 4.082 159 15.8 0:24 (180, 85)
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It brightened up to 3.7 mag and became a naked eye comet in mid January in 2015 (Jan. 13, Marek Biely). Now it is fading. It has already faded down to 15.8 mag (Mar. 15, Yuji Ohshima). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 18 30.44 24 50.5 5.116 5.315 96 15.9 4:55 (187, 30)
Apr. 16 18 28.55 25 22.0 5.100 5.379 100 16.0 4:51 (180, 30)
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Now it is 15.4 mag (Mar. 10, D. Buczynski). It keeps 16 mag until autumn. It keeps observable in good condition for a long time in the Northern Hemisphere. It keeps unobservable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 3 48.77 72 40.7 5.641 5.369 69 16.1 19:07 (162,-27)
Apr. 16 4 3.05 72 55.0 5.705 5.382 66 16.1 18:58 (162,-27)
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Now it is 15.8 mag (Mar. 13, Catalina Sky Survey). It will brighten up to 14 mag in 2017. In 2016, it keeps observable at 16 mag in good condition from winter to spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 30.63 15 23.3 2.924 3.797 146 16.1 22:18 (180, 40)
Apr. 16 11 27.14 15 27.1 2.966 3.780 138 16.1 21:47 (180, 40)
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Now it is 16.3 mag (Feb. 2, Yasukazu Ikari). It keeps 16-17 mag for a long time until 2016 autumn. In the Southern Hemisphere, it keeps observable for a long time. It will be unobservable after this in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 4 2.05 -29 58.2 2.851 2.429 55 16.3 19:07 ( 76, 37)
Apr. 16 4 9.37 -30 29.4 2.842 2.405 54 16.3 18:58 ( 74, 34)
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It brightened up to 11.1 mag in 2015 autumn (Sept. 21, Seiichi Yoshida). Now it is 14.6 mag (Mar. 9, Thomas Lehmann). It keeps observable in good condition after this, while the comet will be fading gradually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 19.32 13 23.8 1.877 2.759 145 16.4 22:07 (180, 42)
Apr. 16 11 15.80 13 17.2 1.983 2.808 137 16.6 21:36 (180, 42)
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It brightened rapidly, and reached up to 15.5 mag (Feb. 11, Yasukazu Ikari). It will be fading after this. It has already faded down to 16.5 mag (Mar. 7, Yasukazu Ikari). It keeps observable until August when the comet becomes fainter than 18 mag in the Northern Hemisphere. It will be unobservable in May in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 8 4.89 33 50.6 2.225 2.544 96 16.4 19:07 (177, 21)
Apr. 16 8 7.99 35 36.7 2.322 2.534 90 16.4 18:58 (174, 19)
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Now it is 17.4 mag (Mar. 16, Space Surveillance Telescope, Atom Site). It will brighten up to 16 mag from April to May. It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 15 54.55 -23 57.0 1.154 2.011 137 16.5 2:45 (180, 79)
Apr. 16 15 51.00 -26 13.4 1.110 2.014 144 16.4 2:15 (180, 81)
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Now it is 16.7 mag (Mar. 4, Yuji Ohshima). It keeps 16-17 mag for a long time from 2016 to 2019. It keeps locating near by the equator.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 7 57.88 2 53.0 9.741 9.982 101 16.4 19:07 (171, 52)
Apr. 16 7 58.79 3 9.6 9.838 9.971 94 16.4 18:58 (164, 51)
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Now it is 16.8 mag (Mar. 17, P. C. Sherrod, L. P. Sherrod). The cometary activity is confirmed recently. It is expected to brighten up to 7 mag in 2017 spring. But it locates somewhat low at the high light.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 20.46 -2 52.7 4.178 5.084 151 16.7 22:08 (180, 58)
Apr. 16 11 16.76 -2 22.4 4.168 5.017 144 16.6 21:36 (180, 57)
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Now it is 16.6 mag (Feb. 19, D. Buczynski). It keeps observable at 17 mag in good condition from winter to spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 15 8.38 3 39.9 1.694 2.603 148 17.0 1:59 (180, 51)
Apr. 16 15 3.98 3 46.3 1.675 2.616 154 17.0 1:27 (180, 51)
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Now it is 17.9 mag (Mar. 7, D. Buczynski). In the Northern Hemisphere, it keeps observable in good condition after this while the comet will be fading. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 13 43.87 30 46.2 2.409 3.248 140 17.0 0:35 (180, 24)
Apr. 16 13 36.23 30 42.7 2.466 3.291 139 17.1 0:00 (180, 24)
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It passed only 0.024 a.u. from the earth on Mar. 23, and brightened up to 12.8 mag (Mar. 22, Paul Camilleri). Almost stellar. Fading very rapidly. It is observable in excellent condition in the Northern Hemisphere. It keeps low after this in the Southern Hemisphere. The orbital elements are similar to those of 252P/LINEAR.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 16 24.59 43 36.1 0.141 1.064 112 17.0 3:14 (180, 11)
Apr. 16 16 33.69 41 47.2 0.196 1.098 114 17.7 2:56 (180, 13)
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It was discovered around the aphelion in 2013 December. It keeps observable at 17 mag in good condition from 2016 to 2017. No observations have been reported since 2014 March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 12 28.69 5 12.4 1.892 2.866 163 17.1 23:15 (180, 50)
Apr. 16 12 22.58 5 33.0 1.888 2.833 155 17.2 22:42 (180, 50)
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It brightened up to 11-12 mag in 2012. It has already faded down to 17.0 mag (Mar. 11, Catalina Sky Survey). It is observable at 17 mag in good condition from winter to spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 10 31.20 -3 55.0 10.454 11.240 139 17.1 21:19 (180, 59)
Apr. 16 10 28.84 -3 36.1 10.571 11.277 132 17.2 20:49 (180, 59)
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Now it is 17.0 mag (Mar. 1, Yasukazu Ikari). It keeps 17-18 mag for a long time until 2017 spring. It will be getting lower gradually after this. It will be unobservable in May in the Northern Hemisphere, or in June inthe Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 6 47.86 -4 55.4 3.777 3.819 84 17.2 19:07 (140, 53)
Apr. 16 6 52.76 -3 18.1 3.853 3.803 79 17.2 18:58 (137, 50)
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Now it is 17.0 mag (Mar. 17, Jean-Francois Soulier). It brightened rapidly, and became brighter than originally expected. It keeps 17 mag until 2017. It is observable in excellent condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 16 27.57 73 49.6 7.193 7.316 93 17.2 3:18 (180,-19)
Apr. 16 16 10.52 74 31.0 7.205 7.311 92 17.2 2:33 (180,-19)
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It was observed as bright as 13-14 mag for a long time from 2011 to 2014. Now it is fading. It is observable in excellent condition in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere. No observations have been reported since August, 2015.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 18 10.07 -34 2.5 8.912 9.253 106 17.2 4:55 (233, 88)
Apr. 16 18 7.91 -34 25.2 8.833 9.287 114 17.2 4:31 (180, 89)
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Appearing in the morning sky. It will be observable at 13 mag for a long time from 2017 to 2018. In 2016, it keeps observable at 16-17 mag in good condition until autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 20 24.52 -15 2.2 6.975 6.778 74 17.3 4:55 (246, 53)
Apr. 16 20 24.29 -14 38.5 6.810 6.734 81 17.2 5:00 (237, 58)
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Now it is 17.4 mag (Feb. 11, Yasukazu Ikari). It was expected to brighten up to 14 mag from winter to summer. But it is much fainter actually. It will be 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)
Apr. 9 16 37.83 -34 15.7 1.707 2.431 125 17.5 3:29 (180, 89)
Apr. 16 16 39.07 -35 26.5 1.679 2.463 131 17.5 3:02 ( 0, 90)
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First return of a peculiar asteroid 1998 HO121. It brightened up to 16.5 mag in early 2015 (Jan. 4, M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann). It is observable at 17.5 mag again in 2016 spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 13 49.59 -3 57.0 2.653 3.643 169 17.5 0:41 (180, 59)
Apr. 16 13 45.99 -3 17.8 2.672 3.670 172 17.5 0:10 (180, 58)
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Now it is 17.4 mag (Mar. 13, Jean-Francois Soulier). It keeps 17.5 mag from 2016 to 2017. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it locates low in 2016, and it is not observable in 2017.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 17 28.76 24 18.6 6.061 6.468 109 17.6 4:19 (180, 31)
Apr. 16 17 27.49 25 39.0 5.989 6.456 113 17.5 3:50 (180, 29)
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Now it is 17.9 mag (Mar. 3, Hidetaka Sato). It will be observable at 17.5 mag in good condition from April to May in the Southern Hemisphere. It is not observable after this in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 17 17.39 -53 8.6 0.876 1.566 112 17.7 4:08 ( 0, 72)
Apr. 16 17 39.26 -59 34.8 0.861 1.560 113 17.6 4:02 ( 0, 66)
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Very far object. Outburst occured on Feb. 20, 2015, and it brightened up to 15 mag. But it is faint as 18.1 mag now (Mar. 18, W. Hasubick). It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 13 22.95 -25 39.7 8.213 9.169 161 17.7 0:14 (180, 81)
Apr. 16 13 20.96 -25 24.0 8.201 9.171 164 17.7 23:40 (180, 80)
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Now it is 17.2 mag (Mar. 19, Space Surveillance Telescope, Atom Site). It becomes brighter than at the discovery in 2015. It is observable at 17.5 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 15 15.72 -1 44.1 5.493 6.368 148 17.7 2:07 (180, 57)
Apr. 16 15 12.04 -0 37.5 5.466 6.387 154 17.7 1:35 (180, 56)
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Now it is 17.9 mag (Mar. 19, iTelescope Observatory, Siding Spring). It keeps 17-18 mag for a long time from 2016 to 2017. In 2016, it is observable in excellent condition in the Southern Hemisphere, but it locates extremely low in the Northern Hemispehre.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 12 5.62 -45 50.6 3.120 3.932 139 17.9 22:53 ( 0, 79)
Apr. 16 12 2.49 -44 32.4 3.074 3.897 139 17.8 22:22 ( 0, 80)
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It keeps 16 mag for a long time from 2017 to 2018. Now it is 17.6 mag (Mar. 11, Yasukazu Ikari). In the Southern Hemisphere, it keeps observable in good condition until early summer. It will be unobservable in May in the Northern Hemispehre.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 9 1.12 -27 4.9 6.335 6.859 117 17.9 19:49 (180, 82)
Apr. 16 8 58.79 -25 48.3 6.379 6.829 112 17.9 19:19 (180, 81)
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Now it is 17.2 mag (Mar. 17, Space Surveillance Telescope, Atom Site). It must have been observable at 16-17 mag in good condition from summer to autumn in the Northern Hemisphere, but it was not discovered. 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)
Apr. 9 10 25.96 20 54.0 2.184 2.934 130 17.9 21:13 (180, 34)
Apr. 16 10 20.96 19 6.6 2.311 2.984 123 18.1 20:41 (180, 36)
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Although it was bright as 17 mag at the discovery in 2006, it faded out before the perihelion passage in 2008, and it became lost. Now it is fainter than 22 mag (June 15, 2015, Erwin Schwab, Marco Micheli).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 16 4.90 4 47.0 3.766 4.530 135 17.9 2:56 (180, 50)
Apr. 16 16 2.75 5 14.6 3.703 4.524 140 17.9 2:26 (180, 50)
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First return of a periodic comet which brightened up to 8 mag in major outburst in 2010. It will be observable in excellent condition from winter to spring. However, now it is faint; the fragment A is 17.9 mag (Mar. 15, Catalina Sky Survey), the fragment C is 17.8 mag (Mar. 15, Catalina Sky Survey), the fragment H is 18.9 mag (Mar. 6, C. Rinner, F. Kugel). It will be 17 mag at best in this apparition. Fragments B to J are also observed.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 9 18.06 20 0.3 0.866 1.588 116 17.9 20:07 (180, 35)
Apr. 16 9 28.80 17 44.8 0.917 1.599 112 18.1 19:50 (180, 37)
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It brightened up to 15.7 mag in winter (Jan. 14, Toshiyuki Takahashi). Now it is fading. It has already faded down to 17.2 mag (Mar. 11, iTelescope Observatory, Mayhill). It will be fainter than 18 mag in April. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 8 11.78 30 17.5 2.027 2.398 98 17.9 19:07 (178, 25)
Apr. 16 8 20.05 30 11.0 2.119 2.407 93 18.1 18:58 (176, 25)
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It keeps observable at 17.5 mag in good condition from spring to autumn in the Southern Hemisphere. It is not observable in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 18 11.69 -59 50.6 4.777 5.113 104 18.0 4:55 (358, 65)
Apr. 16 18 15.20 -60 32.9 4.688 5.101 108 17.9 4:39 ( 0, 64)
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STEREO spacecraft observed it at 8-9 mag on Feb. 21-22. It approached to the sun down to 0.58 a.u. on Mar. 9, but it was not observable around the perihelion passage. It is appearing in the evening sky now. But it will fade out very rapidly.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 3 43.42 12 56.5 1.334 0.818 37 19.0 19:07 (114, 10)
Apr. 16 4 26.88 14 57.0 1.367 0.908 41 20.1 18:58 (119, 13)
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