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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 8.9 mag still now (May 15, Carlos Labordena). In the Northern Hemisphere, it will be unobservable at 10 mag in June. In the Southern Hemisphere, it is observable in the evening low sky from April to June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 8 51.65 30 28.3 2.651 2.479 69 9.5 20:39 (100, 45)
May 26 8 54.10 28 6.2 2.829 2.546 63 9.7 20:47 (101, 37)
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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 was very bright as 11.5 mag visually (Dec. 17, 2010, Juan Jose Gonzalez). Now it is 12.3 mag (May 12, Alexandre Amorim). It has already turned to be stellar.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 16 45.10 -20 31.5 1.452 2.445 165 12.1 0:59 ( 0, 34)
May 26 16 38.46 -21 8.5 1.435 2.445 173 11.9 0:25 ( 0, 34)
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Already so bright as 12.1 mag (May 15, Carlos Labordena). It is expected to be bright as 9 mag from 2012 to 2013. In the Northern Hemisphere, it keeps observable in good condition for a long time until 2012 autumn when the comet brightens up to 10 mag. In the Southern Hemisphere, it is hardly observble before the perihelion passage. But it becomes observable in good condition since 2013 after the perihelion passage.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 14 38.07 55 20.9 2.937 3.324 103 12.6 22:47 (180, 70)
May 26 14 29.07 54 13.5 2.905 3.261 101 12.4 22:10 (180, 71)
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Now it is 14.3 mag (Mar 13, Jakub Cerny). It is already unobservable in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually. It is expected to be observable at 11-13 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 until 2013 January in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 2 27.79 -36 59.4 3.111 2.740 59 13.3 3:13 (293,-36)
May 26 2 37.98 -38 32.6 2.983 2.690 63 13.2 3:07 (296,-34)
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It brightened much faster than expected. Now it is so bright as 11.2 mag (May 14, Juan Jose Gonzalez). In the Northern Hemisphere, it keeps observable at 12-14 mag in good condition until early 2013. In the Southern Hemisphere, it is not observable until late 2012.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 23 38.73 82 41.2 2.464 2.266 66 13.3 3:13 (189, 37)
May 26 2 32.89 85 15.3 2.480 2.241 64 13.2 3:07 (185, 34)
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It is expected to be a great comet of -1 mag in 2013 spring. Now it is 13.3 mag (May 14, Todd Augustyniak). Brightening faster than originally expected. In 2012, it keeps observable until summer while brightening gradually. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 16 22.71 -25 51.5 3.598 4.596 169 13.4 0:36 ( 0, 29)
May 26 16 14.35 -25 54.3 3.508 4.518 175 13.3 0:01 ( 0, 29)
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Now it is bright as 13.1 mag and visible visually (May 15, Juan Jose Gonzalez). It keeps 13-14 mag and observable in good condition until September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 17 8.36 -12 50.5 4.182 5.137 158 13.4 1:22 ( 0, 42)
May 26 16 57.72 -12 42.5 4.150 5.140 166 13.4 0:44 ( 0, 42)
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Now it is bright as 12.8 mag and visible visually (Mar. 14, John Drummond). 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)
May 19 3 56.29 -55 28.6 5.720 5.550 75 13.6 20:39 ( 43,-49)
May 26 4 3.72 -54 42.9 5.720 5.560 75 13.6 3:07 (316,-51)
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Another small outburst occured on May 1. Now it has got diffuse, but still visible as bright as 11.0 mag (May 14, Juan Jose Gonzalez).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 12 5.68 -10 35.5 5.599 6.257 126 13.7 20:39 ( 8, 44)
May 26 12 5.07 -10 24.4 5.689 6.257 119 13.7 20:47 ( 20, 42)
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It kept as bright as 11-12 mag for a long time from 2011 autumn to 2012 spring. It is not observable now. But it will appear in the morning sky again at 15 mag in autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 5 25.83 19 14.6 3.142 2.255 23 13.8 20:39 (115, -1)
May 26 5 41.41 19 21.3 3.197 2.280 20 13.9 20:47 (117, -5)
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This comet brightened up to 10 mag in outburst in 1995, however, it became lost after that. The condition of this apparition is bad. It is not observable around the perihelion passage. Maybe it can be recovered after summer when it appears in the morning sky.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 2 44.71 9 22.1 2.381 1.450 17 14.3 3:13 (247,-15)
May 26 3 6.68 10 28.4 2.399 1.478 18 14.1 3:07 (246,-14)
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Now it is visible visually at 13.9 mag (Mar. 26, Jakub Cerny). It is expected to be 13 mag and will be observable in good condition in 2013. It keeps observable for a long time 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)
May 19 23 28.76 52 7.5 6.908 6.438 58 14.3 3:13 (228, 40)
May 26 23 27.77 52 45.6 6.832 6.419 61 14.3 3:07 (227, 44)
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It will brighten up to 14 mag from May to July. It has not been observed since late January, but it must be already bright at 15 mag. In the Southern Hemisphere, it has been extremely low, but it will be getting higher gradually after this, and will be observable in good condition. It will be hardly observable in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 2 56.87 -27 48.5 1.462 1.103 48 14.8 3:13 (280,-38)
May 26 3 20.04 -31 43.8 1.293 1.082 54 14.4 3:07 (284,-40)
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It was observed at 12.5 mag on Apr. 1, as bright as expected (Michael Jager). Now it is 14.0 mag (Apr. 26, Michael Jager). In the Northern Hemisphere, it locates extremely low in the morning until June. It will be observable at high location after summer. In the Southern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 2 28.52 39 43.8 3.030 2.163 25 14.5 3:13 (226, 8)
May 26 2 46.72 40 51.7 3.092 2.235 26 14.6 3:07 (226, 9)
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It has brightened up to 18.2 mag on Apr. 23 (M. Masek, et al.). It must be brightening rapidly, and must have already brightened up to 15 mag. However, no observations have been reported recently. It will approach to the sun down to 0.12 A.U. on July 14. In the Southern Hemisphere, it keeps observable in good condition except for mid July only, in the morning sky before the perihelion passage, and in the evening sky after the perihelion passage. In the Northern Hemisphere, it is not observable before the perihelion passage. But it will appear in the evening sky at 8 mag in late July. Then it keeps observable while fading rapidly in the evening low sky.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 0 48.80 -35 23.1 1.423 1.421 69 15.3 3:13 (302,-17)
May 26 1 24.41 -33 49.1 1.279 1.300 67 14.6 3:07 (299,-19)
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It brightened up to 9 mag in January and February in the evening low sky. In the Southern Hemisphere, it is observable in the evening extremely low sky in April and May. 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 19 5 11.03 2 53.4 2.482 1.647 27 14.7 20:39 (104,-14)
May 26 5 30.72 2 50.2 2.557 1.711 26 15.1 20:47 (106,-17)
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Now it is 14.3 mag (Mar. 27, Jakub Cerny). After this, it will be observable in good condition in the Southern Hemisphere while fading gradually. It will locate somewhat low in the Northern Hemisphere. In 2011, some visual observers reported it was very bright as 10-12 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 43.34 -14 17.6 2.872 2.898 81 14.7 3:13 (303, 18)
May 26 22 50.68 -14 36.7 2.824 2.943 86 14.8 3:07 (306, 20)
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Now it is so bright as 11.8 mag (May 14, Juan Jose Gonzalez). Although it was extremely faint as 20.5 mag at the recovery in 2010 autumn, it brightened rapidly. It will keep 12-14 mag and observable in good condition for a long time from 2012 to 2013. But it locates somewhat low in the Northern Hemisphere in 2013.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 12 52.59 13 24.9 2.469 3.175 126 14.8 21:02 ( 0, 68)
May 26 12 51.10 12 44.9 2.528 3.160 120 14.8 20:47 ( 8, 67)
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It brightened up to 17.1 mag in late June in 2011 (June 24, J. F. Hernandez). The condition of this apparition is bad, and it was not observable around the perihelion passage. It is appearing in the morning sky. But it still locates extremely low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 0 39.54 -3 48.3 2.594 2.110 51 15.1 3:13 (276, 2)
May 26 0 51.07 -2 41.8 2.569 2.148 54 15.2 3:07 (277, 5)
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Now it is 16.0 mag (Mar. 26, Jakub Cerny). In the Southern Hemisphere, it will be observable at 15-16 mag in good condition for a long time until 2013 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 19 20 41.34 -61 21.6 3.440 3.971 114 15.2 3:13 (348, -8)
May 26 20 43.92 -63 46.7 3.374 3.959 118 15.1 3:07 (351,-10)
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It passed the perihelion on May 2. But it is not observable when it is bright at this apparition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 2 7.65 22 37.1 1.340 0.563 22 15.4 3:13 (242, 0)
May 26 2 20.62 25 8.7 1.478 0.719 25 16.0 3:07 (241, 3)
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Now it is 16.6 mag (Apr. 27, S. Shurpakov). It will brighten up to 13.5 mag from summer to autumn. It keeps observable for a long time until December. In the Northern Hemisphere, it locates high until spring. But after that, it keeps locating low in the evening. In the Southern Henmisphere, it keeps locating low all through the time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 10 50.97 35 25.8 2.016 2.278 91 16.1 20:39 ( 98, 70)
May 26 10 54.84 34 43.2 2.023 2.204 86 16.0 20:47 ( 99, 64)
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Bright new comet. Now it is 16.1 mag (May 14, P. Birtwhistle). It keeps observable in good condition at 15-16 mag for a long time until winter. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 55.46 26 30.0 4.033 3.735 65 16.3 3:13 (263, 40)
May 26 23 2.60 27 44.4 3.947 3.717 69 16.2 3:07 (263, 43)
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Now it is 16.9 mag (Apr. 14, Yasukazu Ikari). It is expected to keep 13 mag and observable in good condition in the Northern Hemisphere for a long time from 2013 to 2014. It keeps observable at 17-18 mag in good condition until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 10 23.58 12 12.2 5.963 6.134 94 16.8 20:39 ( 59, 54)
May 26 10 22.68 12 41.1 6.042 6.089 87 16.8 20:47 ( 69, 47)
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Now it is 16.7 mag (Apr. 14, Yasukazu Ikari). It keeps observable at 17 mag for a long time from 2011 to 2013. In 2012, it keeps observable in good condition until early September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 15 18.05 7 52.7 4.711 5.621 151 16.9 23:27 ( 0, 63)
May 26 15 9.02 8 11.1 4.746 5.622 146 16.9 22:50 ( 0, 63)
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Now it is 16.7 mag (Apr. 21, Catalina Sky Survey). In the Northern Hemisphere, it keeps observable at 16-17 mag in good condition for a long time from 2012 to 2013. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 9 2.89 64 2.1 4.125 3.859 67 16.9 20:39 (149, 48)
May 26 8 58.46 63 28.4 4.186 3.834 62 16.9 20:47 (147, 44)
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First return of a new periodic comet which brightened up to 14 mag in 2005. It is expected to brighten up to 13 mag from summer to autumn, and will be observable in excellent condition. It locates high in the Southern Hemisphere. It is predicted to be already 17 mag. But it has not been recovered yet. Martin Masek reported it was fainter than 17.5 mag on May 14.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 47.02 -22 7.7 1.753 1.926 83 17.2 3:13 (308, 12)
May 26 23 1.85 -20 33.4 1.652 1.884 86 16.9 3:07 (308, 14)
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It has not been observed since 2011 March. Juro Kobayashi detected a possible image of this comet at around 19 mag on Apr. 28. It is predicted to brighten up to 17 mag and will be observable in good condition from spring to summer. But actually, it seems much fainter than expected.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 19 35.14 -7 48.5 1.421 2.146 122 17.0 3:13 (348, 46)
May 26 19 36.57 -7 5.1 1.378 2.161 128 17.0 3:07 (355, 48)
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Now it is 16.3 mag (Apr. 24, V. Gerke, A. Novichonok, S. Plaksa). It tends to brighten after the perihelion passage. It keeps observable at 17 mag from 2012 to 2013. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 16 33.60 -15 24.5 2.133 3.129 167 17.1 0:47 ( 0, 40)
May 26 16 28.88 -15 31.2 2.117 3.126 173 17.0 0:15 ( 0, 39)
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It keeps 17 mag for a long time from 2009 to 2013.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 23 42.08 13 32.1 8.780 8.288 57 17.4 3:13 (270, 24)
May 26 23 41.73 13 45.3 8.685 8.299 64 17.4 3:07 (273, 28)
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Now it is 16.4 mag (Apr. 15, J. F. Hernandez). It will brighten up to 13 mag in 2014. In 2012, it is observable at 17 mag in good condition in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 10 53.74 16 21.6 3.889 4.187 100 17.6 20:39 ( 55, 62)
May 26 10 55.27 15 54.7 3.978 4.172 93 17.7 20:47 ( 65, 55)
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It will approach to the earth down to 0.17 A.U. in July. Then it brightens up to 15 mag and moves northwards very quickly. It has not been observed yet in this return. Now it locates very high in the Southern Hemisphere, but not observable in the Northern Hemisphere. In the Northern Hemisphere, it will become observable in late June, then it will be observable in excellent condition. In the Southern Hemisphere, it keeps excellent condition until July. It keeps observable also after that, but locates somewhat low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 17 20.02 -62 14.7 0.483 1.393 134 18.4 1:33 ( 0, -7)
May 26 17 32.50 -61 47.2 0.421 1.352 137 17.9 1:18 ( 0, -7)
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