Weekly Information about Bright Comets (2026 June 20: North)

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 Updated on June 19, 2026
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* 220P/McNaught

Major outburst of about 9 mag occured from May 31 to June 1, and it brightened up to 8.3 mag (June 3, Marco Goiato). Now it is 10.9 mag (June 16, Carlos Labordena). It will fade out rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 49.75    4 39.0   1.474   1.560    75    8.9   2:59 (284, 27)  
June 27   1  7.87    5 47.7   1.436   1.564    77    9.2   3:01 (285, 30)

* 10P/Tempel 2

Now it is 10.3 mag (June 11, Katsumi Yoshimoto). It brightens up to 8 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 44.76   -9 53.8   0.575   1.488   136    9.4   2:53 (  0, 45)  
June 27  20 56.93  -11 14.0   0.530   1.468   141    9.1   2:38 (  0, 44)

* C/2025 R3 ( PanSTARRS )

It brightened up to 4.0 mag in late April (Apr. 30, Chris Wyatt). It brightened up to 1.3 mag due to the forward scattering in the SOHO LASCO images (Apr. 25, Mikolaj Kaszczyk). Now it is 11.5 mag (June 15, Andrew Pearce). Fading rapidly. In the Northern Hemisphere, it is not observable now, but it will appear in August. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6 57.65  -11 27.1   2.024   1.379    38   10.8  21:04 ( 98,-31)  
June 27   7  3.95  -11 52.5   2.180   1.494    36   11.4  21:04 (101,-36)

* 88P/Howell

It brightened up to 9.6 mag in the very low sky in spring (Apr. 14, Chris Wyatt). Now it is 11.3 mag (June 15, Toru Yusa). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   1 45.38    7 15.5   1.915   1.683    61   11.1   2:59 (273, 17)  
June 27   1 58.90    8 31.5   1.900   1.725    64   11.3   3:01 (275, 22)

* 78P/Gehrels 2

It stays 12 mag for a while. It locates somewhat low. But it will become high in summer in the Northern Hemisphere, or in autumn in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   3 37.85   18 34.9   2.796   2.005    31   12.4   2:59 (248,  1)  
June 27   3 54.91   19 14.5   2.759   2.005    34   12.2   3:01 (249,  4)

* C/2023 R1 ( PanSTARRS )

Now it is 12.6 mag (June 16, Toru Yusa). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in October. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  17 17.02   -7 53.9   2.642   3.623   162   13.4  23:21 (  0, 47)  
June 27  17  0.09   -8 39.0   2.684   3.634   155   13.4  22:37 (  0, 46)

* C/2024 T5 ( ATLAS )

Now it is 13.9 mag (Mar. 12, ATLAS South Africa). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in August. In the Southern Hemisphere, it will be getting higher gradually. It is expected to brighten up to 11 mag in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   4 29.83  -15  0.2   5.415   4.729    43   13.6   2:59 (269,-29)  
June 27   4 36.75  -14 31.6   5.348   4.695    45   13.5   3:01 (271,-24)

* C/2024 J3 ( ATLAS )

Now it is 13.9 mag (June 12, Hiroshi Abe). It stays 14 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20  3.76   34 31.7   3.581   4.104   114   13.7   2:13 (  0, 90)  
June 27  19 56.87   36 22.2   3.532   4.084   116   13.6   1:38 (180, 89)

* P/2021 N1 ( ZTF )

First return of a new periodic comet which brightened up to 17 mag in 2021. It will approach to Earth down to 0.17 a.u. from June to July. It is expected to brighten up to 14 mag. It will turn to fade out rapidly after the peak. It will be fainter than 18 mag in October. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  23  5.30  -37 59.1   0.193   1.106   113   14.4   2:59 (334, 10)  
June 27   0 12.57  -22 53.9   0.173   1.063   100   14.0   3:01 (319, 19)

* 29P/Schwassmann-Wachmann 1

Now it is 13.8 mag (June 15, Toru Yusa). It will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  11  5.33   -1 11.9   6.420   6.316    79   14.0  21:04 ( 69, 25)  
June 27  11  7.81   -1 23.8   6.527   6.316    73   14.1  21:04 ( 73, 20)

* 260P/McNaught

It will brighten up to 13 mag and will be observable in good condition from summer to autumn. Now it is 15.4 mag (June 13, Ken-ichi Kadota). Brightening slowly. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   1  3.66    2 41.9   1.457   1.508    72   14.7   2:59 (284, 23)  
June 27   1 22.53    5 53.0   1.402   1.484    73   14.4   3:01 (283, 27)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.9 mag (May 19, Andrew Pearce). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6  5.21  -67 59.7  13.813  13.876    91   14.6  21:04 ( 24,-48)  
June 27   6 12.25  -68  0.4  13.794  13.855    91   14.6   3:01 (336,-48)

* 63P/Wild 1

Now it is 14.4 mag (June 11, Toru Yusa). Fading slowly. It will be unobservable in July in the Northern Hemisphere, or in September in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9 25.16   20 19.0   2.491   1.981    49   14.7  21:04 (103, 17)  
June 27   9 40.01   18 11.5   2.536   1.977    46   14.6  21:04 (103, 13)

* 141P/Machholz 2

The condition is very bad in this apparition. It is not observable at all. Fading rapidly. It will be fainter than 18 mag in July. It will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6 45.92   17  0.7   2.167   1.207    14   14.8  21:04 (123,-15)  
June 27   7 11.51   15 47.9   2.243   1.280    13   15.5  21:04 (123,-16)

* 235P/LINEAR

It became brighter than expected. Now it is 14.5 mag (June 15, Toru Yusa). It will fade out rapidly after this. It will be fainter than 18 mag in August. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  16 43.92   -8  6.2   1.435   2.405   157   15.1  22:49 (  0, 47)  
June 27  16 40.14   -8  4.8   1.492   2.433   151   15.4  22:18 (  0, 47)

* C/2024 R4 ( PanSTARRS )

Now it is 15.2 mag (June 12, Ken-ichi Kadota). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  22  4.11   42 33.5   5.781   5.909    92   15.2   2:59 (237, 74)  
June 27  21 59.37   43 48.6   5.673   5.874    96   15.2   3:01 (218, 78)

* C/2022 QE78 ( ATLAS )

Now it is 15.5 mag (June 14, Alfons Diepvens). It stays 15 mag for a while. It will be unobservable in July in the Southern Hemisphere, or in August in the Northern Hemisphere. But it will be observable again in September in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9 38.70   30 38.3   6.445   5.849    50   15.2  21:04 (111, 25)  
June 27   9 44.32   30 21.2   6.537   5.867    45   15.3  21:04 (113, 20)

* C/2021 G2 ( ATLAS )

Now it is 14.9 mag (June 11, Toru Yusa). It stays 16 mag for a while. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  17 10.06   15 49.2   6.142   6.945   139   15.4  23:15 (  0, 71)  
June 27  17  7.45   15 58.6   6.205   6.979   136   15.4  22:45 (  0, 71)

* 123P/West-Hartley

Now it is 17.6 mag (May 17, Kunihiro Shima). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in September. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   7 18.98   32 27.5   3.197   2.277    21   15.6  21:04 (130,  1)  
June 27   7 36.03   31 57.8   3.202   2.261    18   15.5  21:04 (131, -1)

* C/2022 N2 ( PanSTARRS )

Now it is 15.8 mag (May 7, Ken-ichi Kadota). It stays 16 mag for a while. Now it is not observable. It will appear in July in the Northern Hemisphere, or in August in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5 48.40   27  0.8   5.748   4.735     3   15.6   2:59 (221,-15)  
June 27   5 56.79   27  0.2   5.777   4.769     6   15.6   3:01 (225,-12)

* 93P/Lovas 1

Now it is 16.0 mag (Jan. 18, Kunihiro Shima). Fading slowly. Now it is not observable. It will appear in August in the Northern Hemisphere, or in October in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5 32.49   30 53.4   2.758   1.760     8   15.9   2:59 (221, -9)  
June 27   5 54.59   30 57.3   2.775   1.781     9   16.0   3:01 (223, -8)

* 169P/NEAT

It will approach to Earth down to 0.17 a.u. in August. It is expected to brighten up to 10 mag from August to September. Now it is 15.8 mag (June 17, Alfons Diepvens). Brightening rapidly. It will be getting lower gradually after this, and it will be unobservable in August. But it will be observable again in in the Northern Hemisphere, or in September in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  19 32.82    5 37.2   0.676   1.604   142   16.6   1:42 (  0, 61)  
June 27  19 27.02    8 22.8   0.576   1.522   144   16.1   1:09 (  0, 63)

* 24P/Schaumasse

It brightened up to 8.4 mag in January (Jan. 14, Mitsunori Tsumura). Now it is 15.2 mag (June 15, Toru Yusa). Fading rapidly. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  14 17.10   -6 38.3   1.511   2.260   125   16.3  21:04 ( 15, 47)  
June 27  14 19.54   -7 44.7   1.637   2.319   120   16.7  21:04 ( 23, 44)

* C/2025 Y1 ( ATLAS )

Now it is 16.1 mag (June 14, Erik Bryssinck). It stays 16 mag for a while. It will be getting lower gradually after this, and it will be unobservable in September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 40.18    4 33.7   5.108   5.362    98   16.3  21:04 ( 54, 46)  
June 27  12 41.20    4 24.1   5.164   5.309    92   16.3  21:04 ( 61, 41)

* C/2024 G6 ( ATLAS )

Now it is 16.6 mag (May 26, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  15 28.49   14 25.2   5.802   6.481   128   16.6  21:34 (  0, 69)  
June 27  15 23.83   14 49.0   5.889   6.487   122   16.6  21:04 (  2, 70)

* C/2022 R6 ( PanSTARRS )

Now it is 16.6 mag (June 15, Andrew Pearce). It stays 17 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in August in the Southern Hemisphere. But it will be observable again in September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   8 57.18    4 25.8   7.495   6.862    48   16.7  21:04 ( 94,  2)  
June 27   9  1.36    4 39.8   7.587   6.875    42   16.8  21:04 ( 97, -2)

* C/2025 M2 ( PanSTARRS )

It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 16.8 mag (June 13, ATLAS-HKO, Haleakala). It stays 17 mag for a while. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 38.99  -17 47.1   4.840   5.664   140   17.0   2:48 (  0, 37)  
June 27  20 32.04  -18  7.6   4.715   5.612   149   16.9   2:14 (  0, 37)

* C/2026 A2 ( Bok )

It will brighten up to 14 mag from autumn to winter. Now it is 16.9 mag (June 17, Jean-Gabriel Bosch). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  17 49.18   77 19.8   2.939   2.925    79   17.0  23:51 (180, 48)  
June 27  17 30.82   78 14.7   2.898   2.867    78   16.9  23:04 (180, 47)

* 65P/Gunn

Now it is 18.0 mag (May 24, Andrew Pearce). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 36.35   -5 42.3   3.385   3.403    82   17.0   2:59 (295, 23)  
June 27   0 41.13   -5 24.9   3.303   3.418    87   16.9   3:01 (300, 28)

* C/2024 G4 ( PanSTARRS )

Now it is 17.1 mag (June 11, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 21.27    4  2.8   4.184   4.951   134   17.1   2:30 (  0, 59)  
June 27  20 19.81    3 47.5   4.132   4.959   140   17.0   2:01 (  0, 59)

* C/2025 E1 ( PanSTARRS )

Now it is 17.2 mag (June 2, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   8 42.77  -62 40.9   3.910   4.082    92   17.1  21:04 ( 33,-32)  
June 27   8 48.32  -62 41.2   3.927   4.070    90   17.1  21:04 ( 33,-35)

* C/2025 Q3 ( ATLAS )

It brightened up to 14.1 mag in early 2026 (Jan. 16, Kunihiro Shima). Now it is 18.5 mag (June 13, John Drummond). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will never be observable after this. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5 40.86  -40 46.3   2.764   2.497    64   17.1   2:59 (293,-53)  
June 27   6  0.05  -42 47.6   2.771   2.540    66   17.3   3:01 (297,-51)

* C/2025 A6 ( Lemmon )

It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Now it is 16.7 mag (June 12, ATLAS-HKO, Haleakala). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  10 49.76  -34 45.0   3.413   3.582    91   17.2  21:04 ( 46, -1)  
June 27  10 52.34  -33 34.6   3.595   3.664    85   17.6  21:04 ( 51, -4)

* C/2022 E2 ( ATLAS )

It was observed at 12-13 mag for a long time in 2024. Now it is 16.9 mag (June 13, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  23  9.24   31 59.3   6.522   6.537    86   17.3   2:59 (266, 61)  
June 27  23  6.44   32  9.2   6.461   6.581    92   17.3   3:01 (269, 68)

* C/2019 E3 ( ATLAS )

Very far object. It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 43.71  -42 47.4  11.303  11.471    96   17.4   2:59 (321, -4)  
June 27   0 43.58  -42 59.4  11.234  11.487   101   17.4   3:01 (325, -1)

* C/2023 X2 ( Lemmon )

Now it is 17.0 mag (May 17, Kunihiro Shima). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  13 17.51   80 13.4   5.510   5.257    70   17.4  21:04 (174, 44)  
June 27  13 20.61   78 31.0   5.531   5.271    70   17.4  21:04 (171, 45)

* P/2012 K3 ( Gibbs )

It was observed at 17 mag in 2012. It was not recovered at the previous return in 2019. Fading slowly. It will be fainter than 18 mag in September. It stays observable in good condition. Now it is fainter than 20 mag (May 24, Jean-Francois Soulier). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 23.59  -12 10.3   1.212   2.111   142   17.7   2:33 (  0, 43)  
June 27  20 23.43  -13  0.9   1.167   2.106   149   17.6   2:05 (  0, 42)

* C/2023 H5 ( Lemmon )

Now it is 17.4 mag (June 10, Alfons Diepvens). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  22  8.54   67 10.0   5.308   5.190    77   17.7   2:59 (193, 56)  
June 27  22  3.12   67 26.0   5.292   5.221    80   17.8   3:01 (187, 57)

* C/2023 F3 ( ATLAS )

Now it is 17.5 mag (May 17, Kunihiro Shima). It stays 18 mag for a while. In the Northern Hemisphere, it will never be observable after this. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9  2.61   -4 45.1   6.931   6.389    54   17.8  21:04 ( 85, -2)  
June 27   9  4.13   -4 21.9   7.050   6.419    48   17.8  21:04 ( 89, -7)

* 161P/Hartley-IRAS

It is expected to brighten up 10 mag from autumn to winter, and it will be observable in good condition. It has not been observed yet in this apparition. It will brighten rapidly after this. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   3  5.67  -23 10.6   2.710   2.403    61   18.1   2:59 (287,-16)  
June 27   3  9.96  -22 23.1   2.571   2.337    65   17.8   3:01 (290,-11)

* C/2026 C1 ( Tsuchinshan )

It is expected to brighten up to 4 mag in 2028 autumn. Now it is 17.8 mag (June 16, M. Camarasa). It stays 18 mag for a while. It will be getting lower gradually after this, and it will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. But it will be observable again in October in the Northern Hemisphere. At the high light, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes observable after the perihelion passage. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12  5.67    7 24.1   8.966   9.023    89   17.8  21:04 ( 65, 42)  
June 27  12  5.25    7 12.2   9.031   8.970    83   17.8  21:04 ( 71, 36)

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