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New comet discovered by the southern survey ASAS. It was 12 mag on ASAS images, but much brighter visually as 10.5 mag (Jan. 6, John Drummond). It will pass only 0.6 A.U. from the sun in late February, so it will be brightening rapidly and reach to 7 mag. In the Southern Hemisphere, it keeps observable until early March. But it will be very low, around 15 degree high, after late January. In the Northern Hemisphere, it will be observable after early March, and keeps observable in the morning sky while fading gradually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 21 23.54 -66 24.4 1.496 1.124 48 10.5 18:33 ( 23,-22)
Jan. 14 21 6.88 -63 36.8 1.437 1.010 44 10.0 18:39 ( 29,-25)
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It was faint as 16.4 mag at the discovery in March (Mar. 12, R. H. McNaught). Then it brightened well as expected, and became visible visually as 12.2 mag in August (Aug. 3, Juan Jose Gonzalez). Now it is 10.2 mag (Jan. 1, Juan Jose Gonzalez). It was very small and sharp before, however, now the size exceeds 2 arcmin and it looks like a typical small comet. It will reach to 10 mag from January to March. In the Southern Hemisphere, it is not observable until autumn. In the Northern Hemisphere, the altitude will be getting lower slowly after January, and it will be too low to observe in April.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 22 6.38 -10 7.0 2.223 1.656 43 10.3 18:33 ( 59, 23)
Jan. 14 22 23.32 -7 32.5 2.223 1.620 41 10.2 18:39 ( 64, 21)
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It was expected to reach to 9 mag in 2006 spring. But actually, it is much fainer than expected, 13.9 mag on Aug. 1 and 11.7 mag still on Oct. 27 (Michael Mattiazzo). It seems to be a comet with very slow brightness evolution, similar to C/2003 T4. It will be 11 mag at best. It is not observable until late March in the Northern Hemisphere, but will be observable for a long time while it is getting fainter after that. It will be too low even in the Southern Hemisphere from January to February. It was reported as 13.3 mag on Dec. 9 (Andrew Pearce). So maybe it is fading unexpectedly?
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 20 18.99 -50 47.7 2.420 1.660 31 11.5 18:33 ( 42,-21)
Jan. 14 20 21.65 -47 49.9 2.445 1.638 27 11.4 18:39 ( 47,-24)
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It had been so faint as around 15 mag for a long time since May. It had been too faint to see visually. However, an outburst occured on Sept. 9 and it brightened to 13 mag (Stephane Garro). Another outburst occured on Nov. 2, and it reached to 12.5 mag (Piotr Guzik). After that, it keeps somewhat faint around 14-15 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 1 44.24 21 28.4 5.444 5.780 105 13.4 18:37 ( 0, 76)
Jan. 14 1 45.58 21 23.0 5.555 5.782 98 13.4 18:39 ( 26, 75)
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It brightened faster than a typical comet, and became visible visually as 13.5 mag in October (Oct. 24, Seiichi Yoshida). Now it is 13.2 mag (Dec. 22, Juan Jose Gonzalez). Small and strongly condensed. Because it is distant from the sun, it keeps observable at 13.5 mag in good condition for a long time until 2006 June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 10 11.77 51 5.7 4.498 5.239 134 13.6 3:07 (180, 74)
Jan. 14 10 10.25 51 41.3 4.457 5.232 138 13.5 2:38 (180, 73)
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It had been an extremely faint Centaur asteroid until 2004, fainter than 21 mag. However, it brightened up to 17.5 mag on 2005 Dec. 30, and a coma was observed, then it was revealed to be a comet. It brightened furthermore, 14.8 mag on Jan. 7 (Ken-ichi Kadota). It is also visible visually at 14.4 mag (Jan. 8, Seiichi Yoshida). A strange spiral structure was captured like a planetary nebula. Looks diffuse visually. It seems to be a temporary brightening in outburst. Future brightness change is uncertain. Maybe it is getting more diffuse gradually?
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 18.21 -6 26.5 13.090 13.058 85 14.5 5:38 (347, 48)
Jan. 14 13 18.73 -6 28.0 12.957 13.045 92 14.4 5:38 (357, 48)
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Although it has already passed the perihelion in 2004 October, the fading after the perihelion passage is slow. It was visible visually still on Oct. 24 at 13.1 mag (Seiichi Yoshida). It is still bright, 14.4 mag on Dec. 17 (Ken-ichi Kadota). Because it is distant from the sun, it can be visible visually as 14 mag for a while after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 2 31.19 -10 17.1 5.300 5.620 104 14.8 19:23 ( 0, 45)
Jan. 14 2 28.73 -9 42.8 5.477 5.684 97 14.9 18:53 ( 0, 45)
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It was fantastic, so bright as 3.5 mag, so large as 30 arcmin, locating high overhead at its best time in early 2004 January. Then it had been getting fainter and smaller gradually, 12.5 mag on Sept. 3 (Edwin van Dijk) and 13.8 mag on Oct. 19 (Mitsunori Tsumura). It is appearing again in the morning sky. It was 15 mag on Dec. 27, as bright as expected (Syuji Kashiwagi). It was not visible visually, fainter than 13.9 mag (Jan. 8, Seiichi Yoshida).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 16 33.91 -0 4.3 5.182 4.531 44 15.1 5:38 (290, 26)
Jan. 14 16 38.96 -0 8.1 5.179 4.599 49 15.2 5:38 (294, 30)
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Although it was faint as 18 mag at the discovery in 2004 November, then it brightened very rapidly until early 2005, and reached to 16.0 mag on May 7 (Ken-ichi Kadota). After it appeared in the morning sky again, it continued brightening furthermore, and reached to 14.7 mag on Nov. 22 (Ken-ichi Kadota). It is also visible visually as 14.8 mag (Jan. 8, Seiichi Yoshida). After this, it keeps bright as 15 mag for a long time until spring. In the Northern Hemisphere, it keeps observable in good condition until summer when it becomes too faint.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 40.61 12 6.8 2.415 2.575 88 15.4 5:38 (327, 64)
Jan. 14 13 47.92 11 59.8 2.353 2.596 92 15.4 5:38 (338, 66)
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It reached to 11.4 mag in August (Aug. 12, Juan Jose Gonzalez). It was expected to start fading since early September. But actually, it keeps bright as 11.8 mag still on Oct. 7 (Juan Jose Gonzalez). Because it had been very low in the morning, it was not observed visually after that. However, it is still bright, 15.5 mag on Dec. 22 (Ken-ichi Kadota).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 35.31 -2 59.3 2.230 2.330 83 15.4 5:38 (340, 50)
Jan. 14 13 34.97 -4 18.2 2.200 2.411 90 15.5 5:38 (351, 50)
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It will pass the perihelion soon, in 2006 February. But it did not brightened so much as expected, 15.7 mag on Dec. 18 (Ken-ichi Kadota). It keeps observable at 15-16 mag for a long time from 2005 spring to the end of 2006. Because it moves in the northern sky, it keeps observable for a long time in the Northern Hemisphere. It is brightest until May, but keeps lower than 30 deg high.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 18 37.74 52 38.7 3.342 3.237 75 15.4 5:38 (223, 28)
Jan. 14 19 2.17 53 4.1 3.341 3.229 74 15.4 5:38 (223, 29)
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The component C was recovered on Oct. 22 as 19.3 mag (C. W. Hergenrother). It will pass only 0.08 AU from the earth on May 12, remarkable approach after 76 years since its discovery in 1930. It was expected be so bright as 2 mag, but actually, it was fainter than its last appearance by 1.5 mag. Anyway, it will be 3.5 mag at best, and will be visible with naked eyes. It brightened up to 16.2 mag on Jan. 4 (Giovanni Sostero). It keeps observable in good condition all through the encounter in May. Brightening rapidly, and will be visible visually as 14 mag in late January. The components B (F) and E have not been recovered yet. The component B (F) will reach to 7 mag in May. However, it may be fainter than its last appearance as the component C. The component E may have already disappeared because it faded before the perihelion passage in its last appearance in 2001. Due to the approach of the comet, Bootids meteor shower observed in 1930 may appear in outburst again in 2005 May and June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 12 44.33 10 41.2 1.696 2.106 100 16.0 5:38 ( 0, 66)
Jan. 14 12 54.36 10 30.2 1.558 2.044 104 15.6 5:21 ( 0, 65)
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It brightened faster than a typical comet, and it reached to 16.1 mag on Dec. 13 (Ken-ichi Kadota). It will be observable in good condition as 16 mag for a long time until next spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 10 59.48 63 13.1 4.358 4.982 124 16.0 3:54 (180, 62)
Jan. 14 10 59.79 64 5.9 4.333 4.979 126 15.9 3:27 (180, 61)
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It was observed as 17.0 mag on July 10. Then it brightened as expected and reached to 15.0 mag on Oct. 1 (Mitsunori Tsumura). It was also visible visually as 13.5 mag Oct. 24 (Seiichi Yoshida). The second component was found at 18 mag on Nov. 30 about 20 arcmin from the main component. The main component also started fading, and it is 16 mag now.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 0 56.44 0 8.4 2.197 2.353 86 16.2 18:33 ( 19, 54)
Jan. 14 1 5.91 1 19.8 2.280 2.357 82 16.3 18:39 ( 29, 53)
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Although it was reported so faint as 17 mag at the discovery on Sept. 10 (M. E. Van Ness), it brightened rapidly and became so bright as 12.8 mag and visible visually in October (Oct. 24, Seiichi Yoshida). However, then it has been fading rapidly. It seems to have brightened temporarily in outburst. Now it is 15.7 mag (Dec. 28, Ken-ichi Kadota), already too faint to see visually. Because it was not discovered in 2004, it seems to be fainter than 19 mag in normal state.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 1 41.83 23 10.1 2.616 3.026 105 16.3 18:35 ( 0, 78)
Jan. 14 1 46.56 23 5.8 2.736 3.053 99 16.6 18:39 ( 28, 77)
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It was visible visually as 14.3 mag in 2005 spring (July 10, Edwin van Dijk). Although it has been not observable for a while, now it is appearing in the morning sky again. Now it is 16.7 mag (Dec. 18, Ken-ichi Kadota). Ken-ichi Kadota reported that a faint anti-tail is visible. It will be observable in good condition again in 2006 spring, but only 16 mag at best. Then it will fade out rapidly, and become fainter than 18 mag in July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 53.21 7 36.3 3.794 3.808 83 16.5 5:38 (326, 58)
Jan. 14 13 49.12 8 17.3 3.686 3.837 91 16.5 5:38 (340, 62)
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It was 18.2 mag on Dec. 24 (Ken-ichi Kadota), fainter than this ephemeris by 1 mag. However, it is getting brighter rapidly in the morning sky after this. It will become visible visually at 13 mag in March, and will reach to 11 mag in June. The condition is best beucase it is almost at opposition at the perihelion passage. However, it will be very low, only 13-20 deg high, from June to September in the Northern Hemisphere. When it gets higher again, it will be fainter than 14 mag, too faint to see visually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 14 35.15 -8 27.8 2.253 2.085 67 16.8 5:38 (323, 39)
Jan. 14 14 49.08 -9 38.3 2.145 2.047 70 16.5 5:38 (328, 40)
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It passes the perihelion in 2006 February. But it is outside of Jupiter's orbit. So it keeps 17 mag for a long time. Because it moves in the northern sky, it keeps locating high and observable in good condition until 2006 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 15 24.83 64 56.3 6.601 6.800 97 16.7 5:38 (206, 52)
Jan. 14 15 28.71 65 15.7 6.575 6.798 98 16.7 5:38 (203, 54)
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It was observed around 20 mag in early October, as bright as expected. Then it brightened rapidly and reached to 16.9 mag on Jan. 4 (S. Pastor, J. A. Reyes). It will be observable in good condition at around 17 mag from December to March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 11 5.76 -0 17.3 1.075 1.771 118 16.9 4:01 ( 0, 55)
Jan. 14 11 10.58 -1 45.7 1.029 1.777 124 16.8 3:38 ( 0, 53)
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It reached to 17 mag in 2004 autumn. Although it has been not observable for a while, now it is observable as 17 mag in good condition again. It was reported as 18 mag recently, fainter than this ephemeris by about 1 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 7 36.04 16 6.6 2.291 3.267 171 17.0 0:32 ( 0, 71)
Jan. 14 7 30.87 16 11.7 2.299 3.279 174 17.0 23:55 ( 0, 71)
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New comet. It will be observable in good condition in February and March. Because it is brightening rapidly, it will reach to 16 mag. But it will fade out rapidly after that.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 9 57.34 3 46.2 1.058 1.891 135 17.3 2:52 ( 0, 59)
Jan. 14 10 2.50 4 45.7 0.990 1.866 142 17.1 2:30 ( 0, 60)
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Although it was so faint as 18.5 mag at the discovery in September, it brightened rapidly. It reached to 16.4 mag on Nov. 27 (Yuji Ohshima). It will be observable around 17 mag until March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 3 32.74 19 5.1 4.532 5.208 129 17.1 20:24 ( 0, 74)
Jan. 14 3 25.25 18 54.2 4.640 5.204 120 17.2 19:50 ( 0, 74)
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It was 16.8 mag at the discovery in May (May 20, R. H. McNaught). Then it brightened rapidly, and became visible visually as 13.7 mag (Sept. 3, Edwin van Dijk). Because it moves in the northern sky, it keeps locating high for a long time in the Northern Hemisphere. However, it is fading rapidly now. It faded down to 16.2 mag on Dec. 17 (Ken-ichi Kadota). It will be fainter than 18 mag at the end of January.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 4 0.60 47 1.6 1.321 2.130 134 17.2 20:53 (180, 78)
Jan. 14 4 3.47 45 47.3 1.412 2.175 129 17.5 20:28 (180, 79)
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It reached to 13 mag and was observed visually in good condition in 2004 autumn. It has been not observable since August, but it is appearing at dawn again. It keeps 17 mag until late April. But it will go away soon after that. Next return is in 2018, when it will be 14.3 mag at best.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 37.97 6 53.2 3.587 3.662 86 17.2 5:38 (333, 59)
Jan. 14 13 39.56 6 35.3 3.523 3.705 92 17.2 5:38 (345, 61)
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It was 17.3 mag on Nov. 1 (Ken-ichi Kadota), fading slowly as expected. It will be fainter than 18 mag in March. It keeps locating high.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 13 32.36 35 51.2 4.453 4.707 98 17.4 5:38 (262, 80)
Jan. 14 13 32.63 36 20.3 4.427 4.765 104 17.5 5:38 (252, 85)
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It will reach to 15.5 mag from late 2006 to early 2007 although locating rather low. It is observable around 17 mag from this winter to spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 10 23.50 -7 54.7 4.680 5.294 124 17.6 3:19 ( 0, 47)
Jan. 14 10 16.73 -8 16.4 4.549 5.256 131 17.5 2:45 ( 0, 47)
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It will be observable at 18 mag in good condition until May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 15 23.01 55 3.1 4.854 4.977 91 17.6 5:38 (221, 56)
Jan. 14 15 22.87 56 33.3 4.792 4.973 94 17.6 5:38 (216, 59)
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It was recovered at 17.3 mag on Sept. 7 (Filip Fratev), as bright as exepcted. It will be fainter than 18 mag in February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 12 9.22 23 1.8 1.487 2.069 112 17.6 5:04 ( 0, 78)
Jan. 14 12 14.97 24 29.7 1.456 2.102 117 17.7 4:42 ( 0, 79)
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It was observed as 17.7 mag in November at opposition (Nov. 3, Ken-ichi Kadota). It will be fainter than 18 mag in February. However, it will be observable at 18 mag again one year later, in next spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 3 23.88 17 25.0 3.925 4.579 126 17.7 20:16 ( 0, 72)
Jan. 14 3 22.58 17 29.3 4.027 4.587 119 17.8 19:47 ( 0, 73)
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New faint comet. It will be only 18 mag at best in December and January. However, Yuji Ohshima reported it was bright as 16.5 mag on Nov. 27, much brighter than this ephemeris.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 3 30.40 33 46.0 2.677 3.399 130 17.8 20:23 ( 0, 89)
Jan. 14 3 31.48 33 24.0 2.739 3.388 123 17.8 19:56 ( 0, 88)
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It was observed in the Southern Hemisphere as 13.6 mag on May 12, as bright as expected (Michael Mattiazzo). It has been observed also in the Northern Hemisphere since August, but already fainter than 16.5 mag. It will be fainter than 18 mag soon.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 4 16.94 10 24.9 2.292 3.082 136 17.8 21:09 ( 0, 65)
Jan. 14 4 14.44 10 54.1 2.400 3.118 129 18.0 20:39 ( 0, 66)
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It was expected to reach to 13 mag in 2005 spring at the perihelion passage. However, the brightness evolution was very slow actually and it was only 14.5 mag at best. Now it is getting higher again in the morning. The fading is very slow, too. The current distance is almost same as that at the discovery, and the brightness faded to 17.9 mag, as bright as at the discovery (Nov. 3, Ken-ichi Kadota).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 6 8.23 9 17.0 2.828 3.767 159 17.8 22:59 ( 0, 64)
Jan. 14 5 54.46 9 58.4 2.931 3.826 151 17.9 22:18 ( 0, 65)
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New comet. Although it was announced so faint as 19 mag, it is actually much brighter, 17.1 mag on Nov. 27 (Yuji Ohshima). However, it will be fainer than 18 mag soon.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Jan. 7 2 4.61 15 28.5 2.382 2.842 107 17.9 18:57 ( 0, 71)
Jan. 14 2 9.36 15 41.1 2.472 2.843 101 18.0 18:39 ( 3, 71)
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