Weekly Information about Bright Comets (2008 Jan. 12: South)

Japanese version Home page	Updated on January 13, 2008
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.

17P/Holmes Great outburst occured on Oct. 24, and it bacame a naked eye comet of 2 mag. It still keeps so bright as 3.5 mag on Jan. 11 (Toni Scarmato). It was completely stellar just after the outburst, however, then a round disk like coma is getting larger gradually. The coma diameter has increased up to about 90 arcmin, and the comet has bacome very diffuse. So it looks like a huge nebula now. This comet was also in great outburst at the discovery in 1892 and became so bright as 4 mag. At that time, the comet faded after the first outburst, but soon brightened again in the second outburst. The comet will be observable in excellent condition for a while after this. It will be easily visible with naked eyes for a while in the dark sky. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 3 2.01 42 27.0 2.125 2.764 121 3.7 21:00 (164, 10) Jan. 19 3 6.02 41 31.7 2.227 2.794 115 4.1 20:56 (161, 10) 8P/Tuttle Now it is 5.7 mag, a large bright object visually (Jan. 11, Toni Scarmato). Now the comet is moving southwards very rapidly. In the Northern Hemisphere, it keeps observable until early February, when it fades down to 7.5 mag. In the Southern Hemisphere, it keeps observable until it fades out. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 10.25 -12 58.9 0.312 1.053 94 5.9 21:00 (116, 53) Jan. 19 2 26.55 -27 37.2 0.396 1.035 85 6.3 20:56 ( 93, 59) 46P/Wirtanen Now it is 8.8 mag (Jan. 10, Juan Jose Gonzalez), already bright visually. It will reach to 8.5 mag from January to March, and will be observable in good condition. In the Northern Hemisphere, it keeps observable in good condition until July when it becomes fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 0 3.56 -6 15.0 0.992 1.097 67 9.6 21:00 (100, 24) Jan. 19 0 24.86 -2 12.8 0.971 1.076 66 9.2 20:56 (103, 21) C/2007 T1 ( McNaught ) Now it is 8.7 mag (Jan. 10, Marco Goiato), much brighter than this ephemeris. It is already unobservable in the Northern Hemisphere. In the Southern Hemisphere, it will be observable in good condition at 9-10 mag until February. In the Northern Hemisphere, it will appear in the evening sky at 11 mag in March, then it keeps observable while fading gradually until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 16 57.84 -66 13.8 1.421 1.102 50 9.7 3:15 (332, 30) Jan. 19 16 49.79 -73 3.3 1.313 1.163 58 9.7 3:24 (339, 35) C/2006 Q1 ( McNaught ) Now it is bright as 12.6 mag and visible visually (Dec. 30, Marco Goiato), brightening well as expected. It will reach to 11 mag in spring. It will keep bright for a long time, however, it keeps moving in the southern sky for a while after this. In the Northern Hemisphere, it keeps extremely low and hard to observe for a while. However, it will be getting higher after March, and will be visible visually at 11 mag in the evening sky until June. Then it becomes unobservable again. But it will appear in the morning sky again at 13 mag at the end of 2008, then it keeps bright and observable for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 9 52.71 -51 2.0 2.953 3.282 100 12.3 2:30 ( 0, 74) Jan. 19 9 51.28 -51 28.6 2.863 3.245 104 12.2 2:01 ( 0, 73) (3200) Phaethon It passed very near by the Earth in early December, and became bright as 12.6 mag (Dec. 5, Juan Jose Gonzalez). The very fast motion was easily observed in the excellent condition. However, it became unobservable in mid December. It will be extremely low in the evening at 16-17 mag in February. But actually, it will never be observable again in this apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 18 55.53 -26 23.7 0.957 0.159 9 13.6 3:15 (312, -9) Jan. 19 20 9.29 -16 41.4 1.222 0.252 4 12.6 20:56 ( 53,-19) 29P/Schwassmann-Wachmann 1 It had been fainter than 14 mag all through this season since July. However, an outburst occured on Dec. 29, and now it is bright at 12.6 mag (Jan. 7, Marco Goiato). It will be bright and visible visually in early January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 5 58.76 30 32.4 5.064 5.985 157 13.4 22:33 (180, 24) Jan. 19 5 55.52 30 23.9 5.114 5.987 150 13.4 22:02 (180, 25) C/2006 OF2 ( Broughton ) It is already bright and visible visually at 13.5 mag (Nov. 13, Juan Jose Gonzalez). It will reach to 10.5 mag and will be observable in good condition in 2008 autumn. It will be too low to observe in late January. It will appear in the morning sky at 12.5 mag in May, then it keeps observable, visible visually, brighter than 14 mag for one year until 2009 May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 21 58.36 -0 43.7 4.254 3.578 41 13.7 21:00 ( 86, -5) Jan. 19 22 5.62 0 14.6 4.265 3.528 36 13.6 20:56 ( 84, -9) C/2006 S5 ( Hill ) Now it is bright as 13.4 mag and visible visually (Jan. 4, Seiichi Yoshida). It keeps observable in good condition for a long time until spring. It will keep visible visually at 14 mag until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 7 49.50 17 26.7 1.673 2.653 173 13.9 0:28 (180, 38) Jan. 19 7 46.13 16 59.1 1.682 2.664 174 13.9 23:52 (180, 38) C/2007 F1 ( LONEOS ) Already unobservable in the Northern Hemisphere, but it is observable in the evening low sky in the Southern Hemisphere. It approached down to 0.4 A.U. to the sun on Oct. 28, and it reached to 5.3 mag (Oct. 25, Juan Jose Gonzalez). Now it is fading. It had already faded down to 10.1 mag on Dec. 1 (Marco Goiato). The brightening became very slow just before the perihelion passage, but it started fading rapidly after the perihelion passage. It will never be observable again in the Northern Hemisphere. But in the Southern Hemisphere, it keeps observable while fading gradually, although it will not locate very high. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 18 33.79 -65 35.5 2.197 1.652 44 13.9 3:15 (337, 21) Jan. 19 18 44.15 -67 29.0 2.256 1.765 48 14.2 3:24 (337, 24) 93P/Lovas 1 Now it is bright and visible visually at 13.3 mag (Jan. 4, Seiichi Yoshida). It keeps locating in good position for a while after this. But it will be fading gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 1 41.46 29 14.8 1.218 1.725 102 14.0 21:00 (144, 15) Jan. 19 1 57.83 29 50.4 1.281 1.737 99 14.1 20:56 (143, 14) 192P/2007 T3 ( Shoemaker-Levy 1 ) It was faint as 18 mag in October, but it brightened rapidly after that. Now it is bright as 13.4 mag and visible visually (Jan. 4, Seiichi Yoshida). It has already passed the perihelion. But it will be brightest after the perihelion passage. It will be visible at 14 mag until February. But the altitude will be around 30 deg. Then it is observable until April when it becomes too low at 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 23 40.06 -12 53.8 1.726 1.495 59 14.5 21:00 ( 90, 23) Jan. 19 23 58.94 -8 57.3 1.779 1.516 58 14.5 20:56 ( 93, 20) C/2008 A1 ( McNaught ) New bright comet. It seems to be visible visually around 13-14 mag. It is expected to be bright in autumn. But it keeps moving in the southern sky, so it is difficult to see in the Northern Hemisphere. It will be locating in the very low sky at about 10 degree high until early March, then it becomes unobservable in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 6 33.11 -43 53.8 3.446 3.936 112 14.6 23:06 ( 0, 81) Jan. 19 6 21.03 -44 23.0 3.402 3.868 111 14.5 22:27 ( 0, 81) C/2006 U6 ( Spacewatch ) Now it is 15.7 mag (Oct. 6, Ken-ichi Kadota), brightening as expected. It will reach to 13.5 mag in the southern sky in spring and summer. In the Southern Hemisphere, it keeps observable for a long time after this. But in the Northern Hemisphere, it keeps locating extremely low until January, and will be unobservable after that. Then it will be observable again at the end of 2008, when the comet will already fade down to 15 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 0 26.14 -46 42.1 3.250 2.944 63 14.7 21:00 ( 56, 44) Jan. 19 0 31.94 -46 27.3 3.269 2.906 60 14.7 20:56 ( 56, 41) C/2007 B2 ( Skiff ) Now it is 16.1 mag (Nov. 30, Ken-ichi Kadota), brightening as expected. It will reach to 13.5 mag from March to July, and will be visible visually. It keeps observable in good condition for a long time until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 12 45.83 9 9.0 3.318 3.679 103 15.0 3:15 (221, 36) Jan. 19 12 48.25 8 40.0 3.185 3.641 109 14.8 3:24 (212, 41) C/2006 K4 ( NEAT ) Now it is 15.8 mag (Sept. 2, R. Salvo). It keeps 15 mag for a long time until spring. It had been locating low even in the Southern Hemisphere for a while, but now it is getting higher gradually. It moves in the southen sky, so it keeps observable in good condition in the Southern Hemisphere. It will never be observable again in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 18 6.20 -69 2.9 3.775 3.216 48 15.0 3:15 (339, 25) Jan. 19 18 17.85 -70 45.4 3.729 3.226 52 14.9 3:24 (339, 28) C/2007 G1 ( LINEAR ) Now it is 15.6 mag (Nov. 24, Ken-ichi Kadota). It was not observable temporarily, but it will be getting higher in the morning sky after January. It will be bright at 12 mag for a long time from 2008 spring to 2009 spring. However, it is only observable until August in the Northern Hemisphere because the comet moves southwards. It keeps observable for a long time in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 17 41.74 0 41.2 4.864 4.096 34 15.1 3:15 (279,-14) Jan. 19 17 46.95 0 4.3 4.766 4.046 38 15.0 3:24 (275, -7) C/2005 L3 ( McNaught ) It was visible visually at 14 mag from spring to autumn in 2007. It was not observable for a while, but it is getting higher gradually in the morning sky. It will be observable at 14 mag at high location again in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 17 10.70 2 0.9 6.289 5.593 41 15.1 3:15 (273, -8) Jan. 19 17 12.29 2 38.1 6.212 5.593 47 15.0 3:24 (268, -1) C/2006 V1 ( Catalina ) It was observed at 16 mag in 2007 spring and summer. Although it had been unobservable for a while, now it is appearing again in the Southern Hemisphere. It keeps 16 mag and observable in good condition after this until 2008 summer. In the Northern Hemisphere, it will never be observable again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 16 50.18 -47 10.9 3.383 2.719 41 15.2 3:15 (313, 23) Jan. 19 17 9.52 -47 55.9 3.354 2.733 43 15.2 3:24 (312, 26) 110P/Hartley 3 Now it is 14.5 mag and visible visually (Jan. 4, Seiichi Yoshida). It will be observable at 14.5-15 mag in an excellent condition until February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 4 58.65 28 26.2 1.622 2.492 145 15.2 21:33 (180, 27) Jan. 19 4 56.94 27 37.8 1.674 2.490 137 15.2 21:04 (180, 27) C/2006 VZ13 ( LINEAR ) It reached to 7.2 mag on July 14 (Maik Meyer), then it faded down to 9.0 mag on Aug. 13 (Carlos Labordena). Although it had been unobservable for a while, now it is observable again. In the Southern Hemisphere, it keeps observable while fading gradually. In the Northern Hemisphere, it will be fading while keeping extremely low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 9 51.13 -49 40.9 2.139 2.534 102 15.3 2:30 ( 0, 75) Jan. 19 9 21.96 -49 18.5 2.141 2.616 107 15.5 1:33 ( 0, 76) C/2006 W3 ( Christensen ) It is already bright as 14.3 mag and visible visually (Dec. 9, Seiichi Yoshida). It is expected to reach to 11 mag in 2009 summer. Because it moves in the northern sky, it keeps observable until it becomes brightest in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 3 59.30 63 10.5 5.181 5.810 125 15.4 21:00 (177, -8) Jan. 19 3 47.18 62 32.0 5.203 5.762 120 15.4 20:56 (173, -8) P/2007 H1 ( McNaught ) It reached up to 12.6 mag and was bright visually in autumn (Oct. 5, Seiichi Yoshida). Now it is fading. It was still visible visually at 14.0 mag on Dec. 9 (Seiichi Yoshida), but it is already hard to see visually. It will be fading and getting lower after this. It is observable until March when it becomes too low at 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 0 53.85 -6 18.7 2.486 2.495 79 15.6 21:00 (108, 34) Jan. 19 1 2.94 -5 6.1 2.588 2.513 74 15.8 20:56 (107, 30) 2005 WY3 Peculiar asteroid moving on a cometary orbit. It brightened up to 16.9 mag on Nov. 20 (Siding Spring Survey), but still completely asteroidal. It will reach to 15 mag in February and March. In the Northern Hemisphere, it keeps observable until July when it becomes fainter than 18 mag. It may show a cometary activity after this, although the perihelion distance is somewhat large as 1.8 A.U. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 10 1.15 -31 57.1 1.130 1.788 115 15.8 2:38 (180, 87) Jan. 19 10 6.01 -32 13.7 1.082 1.784 119 15.7 2:16 (180, 87) C/2007 W1 ( Boattini ) Now it is brightening up to 16.7 mag (Dec. 19, P. C. Sherrod). It will pass 0.85 A.U. from the sun in late June in 2008, and it is expected to reach to 6 mag. In the Northern Hemipshere, it keeps observable in good condition for a long time after this, while the comet is brightening gradually. The comet will be 14 mag in February and become visible visually. Then it is observable until around May 25, when the comet will be 7.5 mag. It will be unobservable for one and a half month around the perihelion passage. But it will appear in the morning sky again at 7 mag in early July, then it keeps observable after that while the comet is fading gradually. In the Southern Hemipsphere, it keeps observable all the period until the comet fades out, although it will be low in mid June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 12 31.56 -6 32.3 2.343 2.711 101 16.2 3:15 (229, 51) Jan. 19 12 36.19 -7 27.4 2.165 2.625 106 15.9 3:24 (219, 57) 50P/Arend Now it is visible visually at 14.6 mag (Jan. 4, Seiichi Yoshida). It keeps observable in good condition until it fades out in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 23.13 43 31.5 1.418 2.029 114 16.1 21:00 (158, 7) Jan. 19 2 34.50 43 12.1 1.494 2.049 109 16.2 20:56 (156, 6) 26P/Grigg-Skjellerup It must be brightening rapidly. However, no observations have been reported since it was observed at 19 mag on Dec. 21 (Luca Buzzi). It is expected to reach to 13 mag in March and April, and to be visible visually. It keeps observable in good condition for a long time in the Southern Hemisphere. In the Northern Hemisphre, it keeps locating low until March. But it will be getting higher after April and observable while the comet is fading. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 12 14.61 -33 34.3 0.992 1.430 92 16.5 3:15 (273, 70) Jan. 19 12 40.66 -36 7.9 0.917 1.380 93 16.2 3:24 (280, 73) 70P/Kojima Now it is 16.8 mag (Nov. 23, Ken-ichi Kadota), brightening as expected. It keeps observable at 16.5 mag in good condition for a long time until April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 12 31.68 2 35.7 1.691 2.161 104 16.4 3:15 (222, 44) Jan. 19 12 37.57 2 32.5 1.634 2.182 110 16.3 3:24 (212, 48) C/2006 K1 ( McNaught ) Now it is 16.2 mag (Nov. 24, Ken-ichi Kadota). It keeps observable in the evening sky until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 48.69 -17 32.1 4.369 4.651 100 16.4 21:00 (123, 62) Jan. 19 2 48.67 -15 58.8 4.477 4.668 95 16.4 20:56 (118, 57) 74P/Smirnova-Chernykh It will reach to 15 mag in 2009 and 2010. Now it is 16.5 mag (Dec. 18, J. R. Vidal). It will be observable at 16.5 mag in good condition until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 4 50.35 23 16.7 3.170 3.999 143 16.5 21:25 (180, 32) Jan. 19 4 47.62 23 18.6 3.231 3.990 135 16.6 20:56 (180, 32) 188P/2007 J7 ( LINEAR-Mueller ) It was visible visually at 14.4 mag in autumn (Oct. 6, Seiichi Yoshida). But it is fading now, and it has already faded down to 17 mag in mid December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 0 29.25 9 36.4 2.548 2.559 79 16.6 21:00 (117, 19) Jan. 19 0 38.14 10 39.4 2.637 2.563 74 16.7 20:56 (115, 15) C/2007 U1 ( LINEAR ) It will reach to 15.5 mag in 2008 autumn and will be observable in good condition. In this winter, it is observable at 17 mag in good condition until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 5 33.54 4 10.3 2.993 3.852 146 16.7 22:07 (180, 51) Jan. 19 5 19.43 4 50.5 3.034 3.820 137 16.7 21:25 (180, 50) 191P/2007 N1 ( McNaught ) It kept brightening even after the perihelion passage, and reached to the maximum brightness at 15.5 mag in mid November. It was also visible visually at 14.5 mag (Nov. 14, Alan Hale). But it is fading now. It has already faded down to 16.8 mag (Dec. 17, Charles Bell). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 48.64 8 22.2 1.697 2.246 111 16.8 21:00 (148, 41) Jan. 19 2 54.46 9 31.9 1.794 2.268 105 16.9 20:56 (143, 38) C/2003 WT42 ( LINEAR ) It was observed visually as bright as 13 mag from late 2005 to early 2006. Now it is fading. It is appearing in the morning sky again. It will be observable in good condition at 17 mag for a long time until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 14 23.19 -0 21.7 7.147 7.005 77 16.8 3:15 (250, 27) Jan. 19 14 25.09 -0 32.0 7.069 7.038 84 16.8 3:24 (243, 34) 65P/Gunn It will reach to 13 mag in 2010. Now it is around the aphelion, but it will be observable at 17 mag in good condition in autumn and winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 8 50.38 29 5.4 3.348 4.288 160 17.0 1:28 (180, 26) Jan. 19 8 45.37 29 34.7 3.312 4.275 166 17.0 0:56 (180, 25) P/2007 T6 ( Catalina ) It will be observable at 17 mag in good condition until February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 9 26.31 29 59.1 1.601 2.516 152 17.0 2:04 (180, 25) Jan. 19 9 22.37 31 36.2 1.599 2.541 158 17.1 1:33 (180, 24) 180P/2006 U3 ( NEAT ) Now it is 18.3 mag (Dec. 14, Ken-ichi Kadota). It will be observable in good condition for a hile until spring. It will reach to 16.5 mag in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 11 2.50 27 51.4 1.858 2.619 131 17.2 3:15 (186, 27) Jan. 19 11 3.67 28 58.5 1.790 2.605 137 17.1 3:13 (180, 26) 124P/Mrkos Now it is 18.4 mag (Dec. 15, Ken-ichi Kadota). It will reach to 16 mag from February to April, and will be observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 11 35.13 59 30.2 1.080 1.816 123 17.3 3:15 (187, -5) Jan. 19 11 34.36 60 17.7 1.016 1.778 125 17.1 3:24 (183, -5) C/2007 M2 ( Catalina ) It keeps 16 mag for one year from 2008 spring to 2009 spring. In the Northern Hemisphere, it keeps observable in good condition while the comet is brightening until 2008 spring. But the comet moves southwards after that, and it will never observable after 2008 July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 12 54.75 13 45.6 4.284 4.611 103 17.3 3:15 (220, 31) Jan. 19 12 52.87 13 28.3 4.136 4.573 110 17.2 3:24 (210, 36) C/2007 T5 ( Gibbs ) It will be observable at 17.5 mag in good condition until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 8 25.36 31 16.6 3.236 4.192 164 17.3 1:03 (180, 24) Jan. 19 8 21.32 32 34.7 3.213 4.178 167 17.2 0:32 (180, 23) 117P/Helin-Roman-Alu 1 It reached to 13.5 mag and became visible visually in 2005 and 2006. Now it has gone far away. But the fading has been slower than predicted, and it is still bright as 16.3 mag (Nov. 7, Ken-ichi Kadota). It will be observable in good condition until February, and will keep 16-17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 1 44.41 7 35.8 4.124 4.337 95 17.4 21:00 (130, 33) Jan. 19 1 46.69 8 0.5 4.247 4.351 89 17.5 20:56 (126, 29) C/2002 VQ94 ( LINEAR ) It had been observed at 16.5 mag for a long time from 2005 to 2007. Now it is fading. But it keeps observable at 17.5 mag in good condition for a long time until July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 14 37.07 15 25.5 8.239 8.144 81 17.5 3:15 (239, 14) Jan. 19 14 37.94 15 24.4 8.159 8.168 87 17.5 3:24 (233, 20) C/2007 D1 ( LINEAR ) Now it is 17.8 mag (Nov. 18, Ken-ichi Kadota). It was observed at 17.5 mag in early 2007. It will be observable at 17.5 mag again in this winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 11 13.09 -1 44.6 8.329 8.875 120 17.6 3:15 (196, 56) Jan. 19 11 12.68 -1 29.7 8.238 8.880 128 17.6 3:22 (180, 57) C/2006 M1 ( LINEAR ) Now it is 17.5 mag (Nov. 25, Ken-ichi Kadota). Because it is distant object, it kept 17 mag for one year and a half. But it will be fading after this, and will be fainter than 18 mag in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 30.74 14 41.5 4.185 4.600 109 17.6 21:00 (146, 33) Jan. 19 2 32.42 14 2.3 4.331 4.638 102 17.7 20:56 (141, 31) C/2007 Y1 ( LINEAR ) It will be observable at 17.5-18 mag until March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 9 39.70 -9 29.2 2.627 3.400 135 17.9 2:18 (180, 65) Jan. 19 9 30.05 -7 16.4 2.538 3.388 144 17.8 1:41 (180, 62) P/2007 V1 ( Larson ) Now it is observable in good condition at 17.5 mag. But it will be fainter than 18 mag in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 2 53.32 29 17.2 2.084 2.688 117 17.9 21:00 (158, 22) Jan. 19 2 57.38 29 18.1 2.169 2.693 111 18.0 20:56 (154, 21) 173P/2005 T1 ( Mueller 5 ) It was observed bright at 16.5-17 mag from late 2006 to early 2007. However, it is fading after that, although it is getting closer to the sun. Now it is observable in good condition, but very faint at 18.4 mag (Nov. 21, Ken-ichi Kadota). This comet was observed so faint around the perihelion passage in the previous apparition at the discovery. So probably, it faded out before the perihelion passage again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 7 49.25 26 8.0 3.270 4.250 173 18.6 0:27 (180, 29) Jan. 19 7 44.92 26 37.9 3.268 4.246 172 18.6 23:51 (180, 28) 128P/Shoemaker-Holt 1 Now it is 18.6 mag (Nov. 16, Ken-ichi Kadota). In the previous apparition in 1997, it brightened after the perihelion passage, and observed visually at 13 mag. However, such a brightening did not happen and the comet kept faint in the current apparition. It became fainter by 3-4 mag than the previous apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 12 7 6.78 16 34.2 2.303 3.280 172 18.7 23:40 (180, 38) Jan. 19 7 2.00 16 42.5 2.331 3.293 165 18.8 23:08 (180, 38)