Weekly Information about Bright Comets (2008 May 3: North)

Japanese version Home page	Updated on May 6, 2008
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern 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 5.5 mag on Apr. 30 (Carlos Labordena). Now it is extremely faint and difficult to see. It was completely stellar just after the outburst. Then the coma had spread out and now it looks like a huge nebula. The coma diameter has increased up to about 90 arcmin in December and January. But now it is going away from the earth, and the diameter reduced to about 60 arcmin. Now it is getting lower and lower rapidly in the evening sky. It will be unobservable soon. But it will become observable in good condition in autumn again. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 5 27.36 35 46.0 3.925 3.247 41 5.5 20:21 (118, 23) May 10 5 38.78 35 31.1 4.016 3.276 37 5.6 20:29 (121, 19) C/2007 W1 ( Boattini ) It is brightening much faster than expected. It is already so bright as 6.9 mag (May 2, Juan Jose Gonzalez). The apparent size is so large as 20 arcmin. It will pass 0.85 A.U. from the sun in late June, and it may reach up to 4.5 mag. In the Northern Hemipshere, it is observable until around May 25, when the comet will be 6 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 5.5 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) May 3 10 45.04 -21 50.7 0.395 1.272 124 7.7 20:21 ( 7, 33) May 10 10 17.13 -22 52.9 0.349 1.186 112 7.1 20:29 ( 23, 28) C/2008 C1 ( Chen-Gao ) New bright comet discovered by two Chinese amateurs. Now it is very bright as 10.6 mag (May 4, Marco Goiato). Diffuse object with a weak condensation. It keeps 10 mag until May. In the Northern Hemisphere, it keeps observable in the evening sky until mid May. But then it moves southwards, and it will never be observable again. 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) May 3 6 22.49 11 36.7 1.594 1.286 53 10.4 20:21 ( 89, 22) May 10 6 38.64 7 15.8 1.660 1.311 52 10.6 20:29 ( 88, 15) 8P/Tuttle It passed near by Earth in early January, and it became a bright large object at 5.4 mag (Jan. 3, Seiichi Yoshida). It was visible with naked eyes. Now it is fading. But the fading is slower than originally predicted, and it is still bright as 10.8 mag (May 4, Marco Goiato). However, it will fade out rapidly after this, and will be fainter than 13 mag in late May. It has already moved away towards the southern sky, and it is no longer observable in the Northern Hemisphere. 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) May 3 7 9.82 -63 37.1 1.326 1.725 94 11.0 20:21 ( 24,-19) May 10 7 48.31 -63 27.4 1.366 1.797 97 11.4 20:29 ( 24,-19) C/2006 Q1 ( McNaught ) Now it is bright as 10.9 mag (Apr. 24, Marco Goiato). It will keep 11 mag for a long time until August. In the Southern Hemisphere, it keeps observable in good condition until summer. In the Northern Hemisphere, the altitude will never be higher than 30 degrees in the evening sky, and the comet will be unobservable in July. 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) May 3 9 46.11 -25 9.0 2.315 2.836 110 11.2 20:21 ( 21, 27) May 10 9 53.13 -22 26.4 2.361 2.821 106 11.2 20:29 ( 29, 27) C/2008 A1 ( McNaught ) It is already very bright as 11.4 mag (Apr. 27, Marco Goiato). It is expected to be 7 mag in September. But it keeps moving in the southern sky, and it is unobservable for a while in the Northern Hemisphere. It will appear in the evening sky at 7 mag in late September, but it keeps locating in the evening low sky until the end of 2008 when it fades out down to 10 mag. Then it turns to appear in the morning sky, and it keeps observable in the northern sky after that while fading gradually. In the Southern Hemisphere, it keeps observable until late October after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 5 26.46 -34 24.4 2.743 2.466 63 12.1 20:21 ( 59,-16) May 10 5 32.63 -34 2.9 2.685 2.384 62 11.9 20:29 ( 62,-21) C/2006 OF2 ( Broughton ) It brightened up to 13.5 mag and became visible visually in 2007 autumn (Nov. 13, Juan Jose Gonzalez). It had been unobservable for a while, but now it is appearing in the morning sky. Now it is 13.0 mag (Apr. 27, J. Broughton), brightening as expected. It will reach to 10.5 mag and will be observable in good condition in 2008 autumn. 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) May 3 0 27.61 22 18.1 3.646 2.845 32 12.3 3:33 (250, 11) May 10 0 39.11 24 12.3 3.568 2.807 35 12.2 3:24 (249, 13) 19P/Borrelly It will reach to 11 mag in summer. It must have already brightened up to 14 mag, but the comet was not observed recently. The condition in this apparition is bad. In the Southern Hemisphere, it keeps extremely low, or under the horizon, so it will not be observable. In the Northern Hemisphere, it is not observable until August when it appears in the morning sky at 11 mag. After August, it keeps observable and fading in the morning sky. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 2 4.62 -5 26.5 2.513 1.633 23 12.6 3:33 (259,-25) May 10 2 22.94 -2 55.7 2.467 1.592 23 12.4 3:24 (256,-23) C/2007 G1 ( LINEAR ) Now it is 14.2 mag, already visible visually (Mar. 17, Alan Hale). 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) May 3 18 8.42 -10 11.6 2.612 3.343 129 12.8 3:24 ( 0, 45) May 10 18 1.63 -11 37.2 2.483 3.301 137 12.7 2:50 ( 0, 43) C/2008 J1 ( Boattini ) New comet. It is bright as 13.4 mag, and visible visually (May 3, Alan Hale). In the Northern Hemisphere, it keeps observable at 12-13 mag for a long time after this until autumn. It will move near by the Northern Pole from summer to autumn, and will be observable all night. Then it keeps observable until 2009 spring when the comet becomes faint. In the Southern Hemisphere, it is only observable until mid June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 21 2.30 10 42.6 1.812 1.950 82 13.2 3:33 (293, 45) May 10 21 10.52 15 56.7 1.726 1.919 84 13.0 3:24 (289, 50) 26P/Grigg-Skjellerup Although it had been extremely fainter than expected until March, it brightened very rapidly in April. Now it is very bright and visible visually at 11.3 mag (Apr. 12, Marco Goiato). However, it is difficult to see because extremely diffuse. CCD observers reported it so faint as 15 mag. This comet tends to be brightest after the perihelion passage. In the Northern Hemisphere, it had been low until March, but now it locates high. It will be visible visually at 12-13 mag until early May in the good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 20 17.20 9 49.0 0.652 1.230 93 13.0 3:33 (306, 53) May 10 20 26.08 13 54.3 0.675 1.268 95 14.0 3:24 (304, 57) 46P/Wirtanen It brightened up to 8.3 mag on Feb. 6 (Juan Jose Gonzalez). However, now it is fading and getting diffuse very rapidly. It has already faded down to 12.5 mag (Apr. 29, Mitsunori Tsumura). It will be too faint to see visually soon. 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) May 3 8 11.96 32 22.0 1.472 1.563 75 13.3 20:21 ( 98, 54) May 10 8 36.48 30 54.3 1.571 1.622 74 13.9 20:29 ( 97, 51) C/2007 B2 ( Skiff ) Now it is very bright as 12.7 mag (Apr. 12, Marco Goiato). It will keep visible visually at 13 mag until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 12 2.96 1 25.6 2.352 3.168 137 13.6 21:16 ( 0, 56) May 10 12 0.50 0 32.1 2.396 3.145 130 13.6 20:46 ( 0, 55) C/2006 U6 ( Spacewatch ) It was 15 mag on Jan. 14 (Michael Mattiazzo), 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 is not observable now. But it will appear in the morning sky at 15 mag in November, then it keeps observable while the comet will be fading slowly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 4 8.88 -43 4.7 2.834 2.525 62 13.8 20:21 ( 57,-33) May 10 4 31.77 -42 43.6 2.801 2.515 63 13.7 20:29 ( 59,-35) 29P/Schwassmann-Wachmann 1 After an outburst on Dec. 29, some outbursts occured repeatedly until mid January. It became very bright as 10.4 mag on Jan. 15 (P. Clay Sherrod). Then it is fading gradually. But it was still bright as 12.7 mag on Mar. 5 (Juan Jose Gonzalez). Now it is 13.7 mag (Apr. 4, Carlos Labordena), and extremely diffuse. It will be too low to observe at the end of May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 14.40 27 57.7 6.610 6.020 50 13.9 20:21 (106, 29) May 10 6 19.36 27 48.9 6.695 6.022 44 14.0 20:29 (109, 22) C/2007 T1 ( McNaught ) It brightened up to 8.5 mag on Jan. 6 (Alexandre Amorim). It kept bright until March, however, now it is getting diffuse and fading rapidly. It has already faded down to 12.0 mag (Mar. 30, Marco Goiato). It will be too low to observe in late May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 41.77 3 49.5 2.739 2.403 60 14.3 20:21 ( 79, 21) May 10 6 48.09 5 28.8 2.926 2.487 54 14.6 20:29 ( 85, 16) C/2005 L3 ( McNaught ) Now it is 12.9 mag (Apr. 27, Sandor Szabo and Zoltan Toth), very bright visually. It keeps observable visually at 13 mag at high location for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 16 29.78 18 40.1 4.874 5.648 136 14.6 1:46 ( 0, 74) May 10 16 21.52 19 41.1 4.858 5.655 138 14.6 1:10 ( 0, 75) C/2007 N3 ( Lulin ) Now it is 15.3 mag (Apr. 11, Ken-ichi Kadota), brightening as expected. It is getting higher gradually in the morning sky. It is expected to reach to 6 mag in 2009 February. After this, it keeps observable until October when it becomes 11 mag. It will be brighter than 14 mag and visible visually in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 21 53.40 -12 1.5 3.674 3.575 76 14.9 3:33 (302, 21) May 10 21 52.86 -12 1.3 3.471 3.501 83 14.6 3:24 (306, 24) C/2006 W3 ( Christensen ) It is already bright as 14.7 mag and visible visually (Mar. 5, 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. But it becomes low from April to June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 3 26.31 56 8.3 5.763 5.050 41 15.0 20:21 (148, 16) May 10 3 30.25 56 20.7 5.749 5.003 38 15.0 20:29 (152, 13) 197P/2008 E2 ( LINEAR ) It was recovered at 18.7 mag on Mar. 3, as bright as expected (R. E. Hill). Then it is brightening rapidly as expected, and already brightened up to 15.5-16.0 mag (Apr. 14, Michael Jager). It will reach to 15 mag in May. In the Southern Hemisphere, it keeps observable in good condition until it fades out. In the Northern Hemisphere, the condition is bad. It will be too low to observe in mid May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 20 18.64 -4 4.0 0.292 1.081 96 15.2 3:33 (318, 42) May 10 21 9.80 -13 42.3 0.284 1.067 93 15.0 3:24 (316, 30) 15P/Finlay Now it is 17.2 mag (Apr. 27, E. Guido, G. Sostero). It will brighten rapidly after this, and it is expected to reach up to 12 mag in June and July. However, it keeps locating extremely low for a while in the Northern Hemisphere. It will be getting higher gradually after late July, then it keeps observable while fading gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 23 20.07 -10 12.0 1.439 1.213 56 15.9 3:33 (287, 6) May 10 23 49.71 -6 41.0 1.394 1.158 54 15.3 3:24 (282, 6) C/2006 V1 ( Catalina ) In the Southern Hemisphere, it keeps 15-16 mag and observable in good condition until 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) May 3 20 41.07 -50 29.4 2.764 3.134 102 15.4 3:33 (338, -1) May 10 20 45.62 -50 39.1 2.723 3.171 107 15.4 3:24 (340, 0) C/2006 S5 ( Hill ) It brightned up to 13.4 mag on Jan. 4 (Seiichi Yoshida). Now it is fading. It was still visible visually at 14.4 mag on Mar. 5 (Seiichi Yoshida). But it has already faded down to 15.6 mag (Apr. 6, Ken-ichi Kadota). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 8 28.27 11 34.9 2.967 3.028 83 15.7 20:21 ( 67, 47) May 10 8 36.62 11 3.4 3.088 3.063 79 15.8 20:29 ( 72, 41) 79P/du Toit-Hartley Now it is 17.4 mag (Mar. 10, Mitsunori Tsumura). It will be observable at 16-17 mag from April to July. It will be fainter than 18 mag in August. It keeps locating in the evening sky all time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 8 30.59 15 41.1 0.895 1.267 83 16.2 20:21 ( 71, 50) May 10 8 51.19 14 8.8 0.896 1.250 81 16.2 20:29 ( 72, 46) C/2007 M2 ( Catalina ) Now it is 16.8 mag (Feb. 29, Ken-ichi Kadota). 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) May 3 11 6.70 7 10.7 3.431 4.058 122 16.3 20:21 ( 1, 62) May 10 11 1.45 6 18.0 3.503 4.028 114 16.3 20:29 ( 21, 60) 2008 HW1 It will approach to the sun down to 0.1 A.U. on June 17. It moves very fast in the northern sky in May. It is observable at 16 mag in good condition in first half of May in the Northern Hemisphere. It passes near by Polaris in mid May, and it will be unobservable at the end of May. If it shows a cometary activity, it may become much brighter than this ephemeris. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 17 3.49 23 27.8 0.310 1.222 127 16.9 2:19 ( 0, 78) May 10 16 59.74 50 26.6 0.207 1.091 107 16.4 1:48 (180, 76) 124P/Mrkos Now it is 16.1 mag (Mar. 9, Ken-ichi Kadota), brightened as expected. Although it had been observable in good condition for a while, it will be getting lower rapidly after this. It becomes unobservable in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 9 37.18 9 24.0 0.900 1.470 100 16.4 20:21 ( 44, 57) May 10 9 45.88 4 49.8 0.953 1.475 97 16.5 20:29 ( 48, 49) C/2007 W3 ( LINEAR ) It will reach to 16 mag from May to July, and will be observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 22 46.99 78 49.2 1.924 1.820 68 16.5 3:33 (193, 39) May 10 22 1.31 81 29.6 1.865 1.803 70 16.4 3:24 (189, 40) 2005 WY3 Peculiar asteroid moving on a cometary orbit. It reached up to 15.0 mag on Mar. 11 (Katsumi Yoshimoto). It has passed the perihelion in late January, but still completely asteroidal. It is already going away from the sun and fading. In the Northern Hemisphere, it keeps observable until July when it becomes fainter than 18 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 11 0.45 4 55.5 1.375 2.087 121 16.4 20:21 ( 3, 60) May 10 11 9.02 6 12.1 1.477 2.126 116 16.6 20:29 ( 17, 60) 180P/2006 U3 ( NEAT ) Now it is 16.7 mag (Feb. 16, Ken-ichi Kadota), brightened as expected. After this, it will be getting fainter slowly and getting lower slowly in the evening sky. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 10 35.15 31 26.7 2.021 2.474 104 16.9 20:21 ( 64, 82) May 10 10 39.93 30 10.8 2.093 2.471 99 17.0 20:29 ( 74, 76) 22P/Kopff It will be bright at 9-10 mag for a long time from spring to autumn in 2009. Now it is predicted to be so faint as 19 mag. But actually, it is 16-17 mag recently, much brighter than expected. Maybe it is in a temporary outburst. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 9 48.58 16 45.4 3.143 3.477 100 16.9 20:21 ( 49, 65) May 10 9 50.23 16 34.2 3.212 3.442 94 16.9 20:29 ( 61, 59) C/2007 K3 ( Siding Spring ) No observations have been succeeded since 2007 July. Now it is appearing in the morning sky, and it is predicted to be so bright as 14 mag. But actually, it was not detected, fainter than 16.8 mag on Apr. 12 (Esteban Reina Lorenz). It seems to be much fainter than expected. It will be observable in good condition from spring to summer. However, maybe it has already disappeared. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 21 21.29 -6 44.6 1.931 2.055 82 17.0 3:33 (305, 30) May 10 21 32.77 -4 34.2 1.877 2.063 85 16.9 3:24 (304, 33) C/2007 M3 ( LINEAR ) Now it is brightest at 17 mag. But it will be fading gradually, and it will be fainter than 18 mag in July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 15 19.29 -14 53.9 3.095 4.093 170 17.1 0:36 ( 0, 40) May 10 15 4.66 -14 22.5 3.118 4.126 176 17.1 23:48 ( 0, 41) C/2008 H1 ( LINEAR ) Now it is 16.5 mag (Apr. 22, Ken-ichi Kadota). It keeps observable in good condition while the comet will be fading slowly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 14 49.03 77 26.7 2.666 2.798 86 17.1 0:08 (180, 47) May 10 14 5.20 75 3.9 2.681 2.811 86 17.1 22:47 (180, 50) 6P/d'Arrest Now it is 18.9 mag (Apr. 26, W. T. Ryle). It will be brightening rapidly after this. It will reach up to 9 mag and keep bright for a long time from summer to autumn. In the Northern Hemisphere, it becomes low in the south at brightest, but it keeps observable until it fades out. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 18 35.85 8 12.8 1.072 1.776 117 17.4 3:33 (350, 63) May 10 18 44.60 9 35.0 0.987 1.731 120 17.2 3:24 (355, 64) 65P/Gunn Now it is 17.2 mag (Mar. 8, Ken-ichi Kadota). Around the aphelion, but it is observable at 17 mag in good condition. It will reach to 13 mag in 2010. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 8 20.30 29 7.5 4.137 4.048 77 17.2 20:21 ( 92, 54) May 10 8 24.81 28 42.3 4.222 4.031 72 17.2 20:29 ( 96, 48) C/2005 S4 ( McNaught ) It was observed at 16.5-17 mag in 2006 and 2007. Because it is a very distant comet, it is observable at 17 mag still in 2008 in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 19 38.57 36 3.2 6.063 6.198 92 17.3 3:33 (261, 73) May 10 19 34.42 37 23.9 6.013 6.214 96 17.3 3:24 (254, 78) 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) May 3 14 7.04 16 1.8 7.677 8.541 147 17.4 23:19 ( 0, 71) May 10 14 3.67 15 48.5 7.740 8.567 142 17.4 22:48 ( 0, 71) 7P/Pons-Winnecke Brightening rapidly. It will reach to 14 mag in autumn. However, it locates extremely low in the Northern Hemisphere. It keeps higher than 30 degree even in the Northern Hemisphere until August, when it brightens up to 15 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 10 29.15 39 56.8 1.643 2.061 99 17.6 20:21 (125, 81) May 10 10 31.49 38 39.9 1.662 2.008 94 17.5 20:29 (109, 75) 70P/Kojima It was 16.4 mag on Mar. 7 (Ken-ichi Kadota), brightened as expected. Although it had been observable at 16.5 mag in good condition for a while, it will fade out rapidly after this. It will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 12 9.17 9 10.2 1.772 2.583 134 17.6 21:22 ( 0, 64) May 10 12 9.05 8 51.7 1.865 2.614 128 17.8 20:54 ( 0, 64) 68P/Klemola Now it is 18.8 mag (Apr. 25, V. Nevski). It keeps observable while the comet will be brightening gradually after this. It will reach up to 14.5 mag in autumn. However, then it locates low in the evening sky, and it will be unobservable soon in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 16 5.70 -6 26.3 2.070 3.026 157 17.9 1:22 ( 0, 49) May 10 16 1.17 -5 44.4 2.002 2.980 162 17.7 0:50 ( 0, 49) 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 19.4 mag (Mar. 10, Mitsunori Tsumura). This comet was observed so faint around the perihelion passage in the previous apparition at the discovery. It faded out before the perihelion passage again in this apparition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 7 50.21 28 24.7 4.424 4.215 71 20.0 20:21 ( 95, 48) May 10 7 56.16 28 12.8 4.520 4.215 66 20.1 20:29 ( 98, 42)