Weekly Information about Bright Comets (2020 Aug. 15: South)

Japanese version
Home page
Updated on August 15, 2020
Last week North Next week

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

---------------------------------------------------------------------

* C/2020 F3 ( NEOWISE )

Great comet. It approached to Sun down to 0.29 a.u. on July 3, and it brightened up to 0.6 mag (Alan Hale). Now it is fading. But it is still very bright as 6.4 mag (Aug. 10, Marco Goiato). It stays observable in the evening sky until early October when it fades down to 12 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  13 46.18    8 13.6   1.173   1.115    60    7.4  18:54 (130, 33)  
Aug. 22  14  4.99    2 34.3   1.394   1.250    60    8.3  18:58 (123, 34)  

* 88P/Howell

Now it is 10.3 mag (Aug. 8, Marco Goiato). It will brighten up to 8-9 mag from summer to autumn. It will be observable in excellent condition in the Southern Hemisphere. It locates very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14 17.21  -15 46.7   1.309   1.432    74    9.6  18:54 (114, 55)  
Aug. 22  14 35.39  -17 34.7   1.322   1.409    72    9.4  18:58 (109, 53)  

* C/2017 T2 ( PanSTARRS )

Now it is 10.3 mag (Aug. 8, Marco Goiato). It stays observable in the evening sky until September when it fades down to 12 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  13 48.15   11 35.1   2.404   2.102    60   10.4  18:54 (133, 30)  
Aug. 22  13 58.36    8  3.2   2.527   2.160    57   10.6  18:58 (125, 29)  

* C/2019 U6 ( Lemmon )

It brightened up to 6.0 mag in June (June 13, Marco Goiato). Now it is fading. It has already faded down to 10.5 mag (Aug. 8, Marco Goiato). It stays observable in good condition for a long time after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14 18.73   20 37.2   1.374   1.345    66   11.0  18:54 (146, 26)  
Aug. 22  14 41.33   21 34.3   1.492   1.430    66   11.7  18:58 (144, 24)  

* C/2020 K8 ( Catalina-ATLAS )

Now it is 15.5 mag (July 22, Martin Masek). Small comet. But it will approach to Sun down to 0.47 a.u. in September, and it is expected to brighten up to 11 mag. It stays observable in good condition until late August while the comet will be brightening up to 11 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   5 37.42   26  3.5   0.598   0.856    57   12.2   5:15 (219, 17)  
Aug. 22   6 54.36   18 34.4   0.634   0.735    46   11.7   5:07 (234, 14)  

* 2P/Encke

Now it is 10.9 mag (Aug. 8, Marco Goiato). In the Southern Hemisphere, it stays observable in good condition in the evening sky while the comet will be fading. It locates very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14 12.50  -28 24.2   0.734   1.127    78   12.4  18:54 ( 93, 61)  
Aug. 22  15  3.62  -30 40.3   0.837   1.234    83   13.3  18:58 ( 92, 65)  

* 58P/Jackson-Neujmin

Recovered from SWAN images after 24-year blank. It brightened up to 10.2 mag in spring (May 31, Marco Goiato). Now it is fading. But it is still bright as 12.5 mag (July 27, Paul Camilleri). It stays observable for a long time after this until the comet fades out.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   5 42.44   12 43.2   1.969   1.659    57   13.3   5:15 (229, 27)  
Aug. 22   5 58.24   12 18.0   1.963   1.703    60   13.6   5:07 (228, 28)  

* 29P/Schwassmann-Wachmann 1

Outburst occured on July 27. Now it is bright as 13.1 mag (July 31, Martin Masek).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   2 51.42   26 28.7   5.659   5.818    94   13.5   5:15 (181, 28)  
Aug. 22   2 52.62   26 45.8   5.553   5.819   100   13.5   4:51 (180, 28)  

* C/2019 N1 ( ATLAS )

Now it is 13.5 mag (July 31, Ken-ichi Kadota). It is expected to brighten up to 12 mag from autumn to winter. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually, but it is hardly observable at the high light. In the Southern Hemisphere, it is not observable for a long time, but it will be observable in good condition after the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  12 18.71   32 45.9   2.869   2.205    40   13.7  18:54 (131,  0)  
Aug. 22  12 24.05   29 13.4   2.875   2.151    36   13.6  18:58 (125, -1)  

* 246P/NEAT

Now it is 14.2 mag (July 16, Paul Camilleri). It stays 13-14 mag from 2020 to 2021. It will be unobservable in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  13 19.75    2 20.4   3.494   3.042    55   14.4  18:54 (120, 32)  
Aug. 22  13 27.63    1  2.9   3.556   3.030    51   14.4  18:58 (114, 29)  

* C/2018 N2 ( ASASSN )

Now it is 13.9 mag (July 19, Ken-ichi Kadota). It stays 14 mag until autumn. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  12 23.41   80 47.1   4.338   4.088    69   14.4  18:54 (170,-30)  
Aug. 22  12 54.29   78 48.8   4.363   4.129    70   14.5  18:58 (169,-29)  

* C/2020 H4 ( Leonard )

It was expected to brighten very rapidly, and brighten up to 14.5 mag from August to September. However, its current brightness is very uncertain. It could not be detected as fainter than 18.0 mag on June 30 (Charles S. Morris), and fainter than 15.7 mag on July 13 (Sandor Szabo). However, Giuseppe Pappa reported as 14 mag on July 10, and Thomas Lehmann reported it is bright as 15.2 mag on July 12. In the Northern Hemisphere, it stays observable for a long time, although it becomes extremely low in early September. In the Southern Hemisphere, it is not observable until late October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  10 34.71   54 34.8   1.450   0.972    41   14.7  18:54 (139,-27)  
Aug. 22  10 38.79   48 18.7   1.529   0.947    37   14.7  18:58 (130,-29)  

* C/2020 F8 ( SWAN )

It brightened up to 4.7 mag in early May (May 2, Marco Goiato). However, it has faded and got diffused after that. It had already faded down to 7.3 mag in late May (May 21, Mitsunori Tsumura). It is appearing in the morning sky. However, maybe it has already disappeared. It stays observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   6 44.61   17 36.5   2.319   1.706    41   14.8   5:15 (237, 13)  
Aug. 22   6 46.18   15 44.3   2.326   1.818    48   15.1   5:07 (235, 18)  

* C/2017 K2 ( PanSTARRS )

Now it is 15.5 mag (July 31, Charles S. Morris). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it is not observable at the high light from 2022 summer to 2023 summer. In the Southern Hemisphere, it is only visible in the extremely low sky in summer in 2020. But it will be observable in good condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  17  8.20   48 53.5   8.373   8.493    93   14.9  19:31 (180,  6)  
Aug. 22  17  6.33   48  1.0   8.359   8.441    91   14.9  19:02 (180,  7)  

* C/2019 F1 ( ATLAS-Africano )

Now it is 15.4 mag (July 9, R. Carstens). It will brighten up to 13 mag in 2021. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it stays observable at 15 mag until October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  13 55.90  -25 53.3   4.711   4.540    74   14.9  18:54 ( 95, 56)  
Aug. 22  13 58.89  -26 33.9   4.774   4.504    68   14.9  18:58 ( 89, 50)  

* C/2020 F5 ( MASTER )

Now it is 15.1 mag (July 18, P. Camilleri, H. Williams, J. Oey, M. Al-Bussadi). It stays 14-15 mag until 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until June in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  15 20.63  -78  4.9   4.363   4.693   102   15.2  18:54 (  5, 46)  
Aug. 22  15 36.18  -77 14.1   4.390   4.671    99   15.2  18:58 (  7, 47)  

* C/2020 J1 ( SONEAR )

Now it is 15.5 mag (July 18, P. Camilleri, H. Williams, J. Oey, M. Al-Bussadi). It will brighten up to 13.5 mag in spring in 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until spring in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  18 43.22  -64 56.1   3.437   4.054   121   15.3  21:05 (  0, 60)  
Aug. 22  18 19.53  -63 36.2   3.484   4.019   115   15.3  20:15 (  0, 62)  

* C/2019 L3 ( ATLAS )

Now it is 14.7 mag (July 27, D. Buczynski). It will brighten up to 12 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2021 November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   0 56.02   62  9.8   5.521   5.693    94   15.5   3:22 (180, -7)  
Aug. 22   0 54.75   63  0.8   5.413   5.649    98   15.4   2:54 (180, -8)  

* C/2018 F4 ( PanSTARRS )

It brightened up to 13.5 mag in winter (Dec. 6, Chris Wyatt). Now it is fading slowly. Now it is 15.1 mag (July 25, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is appearing in the morning sky, but it stays low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   3 21.59  -36  1.1   3.827   4.152   101   15.4   5:15 (280, 83)  
Aug. 22   3 18.36  -36 26.6   3.789   4.187   106   15.5   5:07 (306, 88)  

* C/2019 K7 ( Smith )

Now it is 15.6 mag (July 19, Thomas Lehmann). It stays 15-16 mag for a long time until 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  19  1.71   20  8.9   3.801   4.501   128   15.4  21:24 (180, 35)  
Aug. 22  18 53.75   20 14.3   3.874   4.507   123   15.5  20:49 (180, 35)  

* 115P/Maury

Now it is 15.9 mag (Aug. 11, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15-16 mag in good condition from June to August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  19  9.22   -5 54.3   1.165   2.062   142   15.5  21:32 (180, 61)  
Aug. 22  19 11.03   -7  5.1   1.209   2.067   136   15.6  21:07 (180, 62)  

* 84P/Giclas

Now it is 15.4 mag (July 29, Martin Masek). It stays 15.5 mag from summer to winter, and 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)  
Aug. 15   6  8.80   19 27.3   2.318   1.845    50   15.6   5:15 (229, 18)  
Aug. 22   6 25.28   19 30.4   2.291   1.869    53   15.6   5:07 (229, 18)  

* C/2020 P1 ( NEOWISE )

New comet. Now it is 15.5 mag (Aug. 4, M. Mattiazzo). Although it is a tiny comet, it will approach to Sun down to 0.34 a.u. on Oct. 20, and it is expected to brighten up to 8.5 mag. In the Southern Hemisphere, it stays observable in good condition until late September when it brightens up to 11.5 mag. In the Northern Hemisphere, it stays unobservable for a while. But it will appear in the morning sky at 10 mag in late October. Then it stasy observable while the comet will be fading rapidly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  12 28.04  -70 11.9   1.162   1.531    89   16.2  18:54 ( 24, 43)  
Aug. 22  12 24.94  -66 42.6   1.118   1.408    82   15.7  18:58 ( 29, 40)  

* C/2017 U7 ( PanSTARRS )

Now it is 15.6 mag (July 25, ATLAS-MLO, Mauna Loa). It is observable at 15-16 mag in 2020. It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  18 21.30  -27 27.5   6.089   6.812   132   15.8  20:44 (180, 82)  
Aug. 22  18 16.18  -27  4.4   6.204   6.827   124   15.9  20:12 (180, 82)  

* C/2018 U1 ( Lemmon )

Now it is 16.1 mag (Aug. 1, M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann). It will stay at 15 mag for a long time from 2021 to 2022. In the Northern Hemisphere, it stays observable in good condition while brightening gradually. In the Southern Hemisphere, it stays locating low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  17 40.12   26 19.3   5.611   6.023   109   16.0  20:03 (180, 29)  
Aug. 22  17 36.34   24 57.0   5.652   5.994   104   16.0  19:32 (180, 30)  

* C/2020 M3 ( ATLAS )

Now it is 17.0 mag (July 29, ATLAS-MLO, Mauna Loa). It will brighten up to 14 mag in November, and will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   2 10.56  -35 40.6   0.921   1.640   115   16.5   4:36 (  0, 89)  
Aug. 22   2 30.64  -36  8.5   0.850   1.580   115   16.1   4:28 (  0, 89)  

* 162P/Siding Spring

Now it is 16.8 mag (July 2, R. Carstens). It brightens up to 16 mag from summer to winter. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is not observable until late October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  21 49.95  -70 39.9   1.027   1.796   123   16.3   0:18 (  0, 54)  
Aug. 22  21 31.47  -70 41.8   0.999   1.748   120   16.2  23:26 (  0, 54)  

* C/2019 T2 ( Lemmon )

Now it is 16.4 mag (July 25, G. Hug). It will brighten up to 14.5 mag from spring to summer in 2021. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is observable in good condition in 2020, however, it will be unobservable in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  22 47.99   -1 15.4   2.719   3.681   158   16.4   1:15 (180, 56)  
Aug. 22  22 39.07   -3 41.8   2.638   3.634   168   16.3   0:38 (180, 58)  

* 257P/Catalina

Now it is 16.5 mag (July 19, Thomas Lehmann). It will brighten up to 16.5 mag and will be observable in good condition from June to October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  20 15.49   15 45.4   1.250   2.152   143   16.3  22:38 (180, 39)  
Aug. 22  20 13.33   14 35.9   1.260   2.148   141   16.3  22:08 (180, 40)  

* 304P/Ory

Now it is 16.4 mag (Aug. 2, ATLAS-HKO, Haleakala). It brightens up to 16 mag in September. It is observable in good condition in the Northern Hemisphere. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   5 22.17   22 14.7   1.383   1.259    61   16.5   5:15 (218, 22)  
Aug. 22   5 48.80   22 44.5   1.377   1.264    61   16.3   5:07 (219, 21)  

* C/2017 B3 ( LINEAR )

It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, Chris Wyatt). Now it is fading slowly. Now it is 16.1 mag (July 28, Martin Masek). In 2020, it stays observable in good condition while the comet will be fading from 16 to 17 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   0 31.55    1 13.1   5.322   6.076   134   16.4   2:58 (180, 54)  
Aug. 22   0 28.35    1 22.6   5.289   6.118   142   16.4   2:27 (180, 54)  

* 249P/LINEAR

Now it is 15.7 mag (July 28, Martin Masek). It was expected to brighten rapidly up to 9.5 mag in June. But actually, it is fainter than predicted. However, it became very bright as 7.5 mag in SOHO spacecraft images on June 19 (Karl Battams). It is observable in good condition after this while the comet will be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   6 10.48   25  7.3   1.343   1.040    49   16.4   5:15 (226, 13)  
Aug. 22   6 23.11   24 29.4   1.394   1.141    53   17.1   5:07 (225, 15)  

* C/2019 T4 ( ATLAS )

Now it is 15.9 mag (Apr. 24, J. Drummond). It is expected to brighten up to 13 mag in 2022. In 2020, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is not observable. It will be observable from autumn to winter, but it locating extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   7 41.71  -26 48.6   7.363   6.754    49   16.6   5:15 (285, 28)  
Aug. 22   7 47.12  -27 16.0   7.299   6.714    51   16.6   5:07 (283, 31)  

* C/2017 Y2 ( PanSTARRS )

Now it is 16.8 mag (July 20, A. Diepvens). It will be observable at 16.5-17 mag from spring in 2020 to summer in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  17 39.77   13 55.6   4.165   4.678   114   16.6  20:03 (180, 41)  
Aug. 22  17 33.60   12 19.4   4.250   4.670   108   16.7  19:29 (180, 43)  

* 17P/Holmes

Now it is 16.4 mag (July 29, ATLAS-MLO, Mauna Loa). It brightens up to 15 mag in winter. But it is not observable at high light. In the Southern Hemisphere, it stays observable in good condition until autumn when the comet will brighten up to 16 mag. It stays locating very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  17 51.65  -40 34.5   1.801   2.514   124   16.8  20:15 (  0, 85)  
Aug. 22  17 52.48  -39 18.7   1.844   2.487   118   16.7  19:49 (  0, 86)  

* C/2018 A6 ( Gibbs )

It brightened up to 13.2 mag from spring to autumn in 2019 (June 30, Thomas Lehmann). Now it is fading slowly. It has already faded down to 16.6 mag (July 17, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it stays low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  23 27.98  -31  3.5   3.602   4.506   149   16.8   1:55 (180, 86)  
Aug. 22  23 19.29  -31  0.7   3.614   4.546   154   16.9   1:19 (180, 86)  

* C/2019 T3 ( ATLAS )

Now it is 16.2 mag (July 22, D. Buczynski). It will be observable at 16.5-17 mag from 2020 to 2021. In the Southern Hemisphere, it is not observable until summer in 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   1 15.60   74 16.3   6.107   6.110    85   16.9   3:43 (180,-19)  
Aug. 22   0 58.70   74 36.7   6.023   6.099    89   16.8   2:58 (180,-20)  

* C/2019 O3 ( Palomar )

Now it is 16.9 mag (Aug. 11, Toshihiko Ikemura, Hirohisa Sato). It stays at 17 mag from 2020 to 2021.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  19 11.36   32 12.0   8.323   8.899   121   17.1  21:34 (180, 23)  
Aug. 22  19  7.94   32  6.3   8.359   8.894   119   17.1  21:03 (180, 23)  

* 156P/Russell-LINEAR

Now it is 17.9 mag (July 31, ATLAS-HKO, Haleakala). It is expected to brighten up to 16 mag from October to November, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   0 14.66  -36 22.3   0.809   1.706   138   17.5   2:41 (  0, 89)  
Aug. 22   0 16.11  -37  7.3   0.747   1.661   141   17.3   2:15 (  0, 88)  

* P/2020 M2 ( Lemmon )

First return of a new periodic comet which brightened up to 17.5 mag in 2012. Now it is 17.3 mag (July 23, ATLAS-MLO, Mauna Loa). It stays observable at 17 mag in good condition from summer to winter. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   4 13.92   27 13.9   2.340   2.314    75   17.3   5:15 (201, 25)  
Aug. 22   4 24.88   28 13.9   2.272   2.323    80   17.3   5:07 (198, 24)  

* 278P/McNaught

Now it is 17.1 mag (July 31, ATLAS-HKO, Haleakala). It became brighter than orignally predicted. It stays observable at 17 mag in good condition until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14  3.70  -17 36.4   2.166   2.099    72   17.3  18:54 (109, 53)  
Aug. 22  14 16.64  -18 45.8   2.228   2.094    69   17.4  18:58 (103, 50)  

* (6478) Gault

Main-belt asteroid. But it showed a straight tail like a comet in 2019. In 2020, it brightens up to 16.5 mag and stays observable in good condition from September to October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   0 41.64   12  2.1   1.411   2.183   127   17.5   3:08 (180, 43)  
Aug. 22   0 40.91   10 50.6   1.363   2.199   135   17.3   2:40 (180, 44)  

* C/2016 M1 ( PanSTARRS )

It brightened up to 7.7 mag in June in 2018 (June 19, Juan Jose Gonzalez). Now it is fading. It has already faded down to 16.9 mag (Apr. 22, J. Drummond). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. It will be observable in good condition after late August also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   6 32.50  -10 17.8   7.957   7.380    52   17.4   5:15 (258, 34)  
Aug. 22   6 34.62  -10 27.1   7.938   7.432    56   17.4   5:07 (255, 37)  

* 254P/McNaught

Now it is 18.8 mag (July 18, Jost Jahn). It will brighten up to 17.5 mag in autumn. It is observable in excellent condition in the Southern Hemisphere. It locates very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  23 30.18  -27 51.2   2.225   3.147   150   17.6   1:57 (180, 83)  
Aug. 22  23 27.66  -29 27.5   2.204   3.144   153   17.5   1:27 (180, 84)  

* 312P/NEAT

Now it is 19.3 mag (July 27, Jost Jahn). It will brighten up to 17.5 mag in September. It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  23 20.17  -11 37.0   1.045   2.010   155   17.6   1:46 (180, 66)  
Aug. 22  23 20.07  -13 52.4   1.016   2.002   161   17.5   1:19 (180, 69)  

* 28P/Neujmin 1

Now it is 16.8 mag (July 18, P. Camilleri, H. Williams, J. Oey, M. Al-Bussadi). It will brighten up to 15.5 mag in early 2021. In 2020, it stays observable at 17 mag until November in the Southern Hemisphere. In the Northern Hemisphere, it will be unobservable soon. Then it stays unobservable until 2021 June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14 18.76  -28 42.2   2.785   2.793    79   17.7  18:54 ( 93, 62)  
Aug. 22  14 25.98  -28 51.5   2.820   2.737    74   17.7  18:58 ( 89, 57)  

* 215P/NEAT

Now it is 17.8 mag (July 21, A. Diepvens). It was observed at 17 mag in 2019. In 2020, it is observable at 17.5 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   1  2.95   -5 11.6   3.016   3.737   129   17.7   3:29 (180, 60)  
Aug. 22   1  1.74   -5 27.8   2.951   3.744   135   17.7   3:00 (180, 60)  

* P/2019 LD2 ( ATLAS )

Now it is 17.3 mag (July 31, ATLAS-HKO, Haleakala). It stays 18 mag from 2019 to 2020.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  21  1.38   -6 28.0   3.598   4.593   168   17.7  23:24 (180, 61)  
Aug. 22  20 58.08   -6 55.0   3.619   4.595   162   17.7  22:53 (180, 62)  

* C/2017 K5 ( PanSTARRS )

Sam Deen pointed out that it brightened in outburst twice in 2017 and 2019. It was observed at 20-21 mag in 2017. Then it became fainter than 22.9 mag in 2018 summer (Aug. 29, Sam Deen). However, it brightened up to 17.2 mag in 2019 spring (Mar. 25, B. T. Bolin). Then it faded again down to 19.9 mag (May 29, Toshihiko Ikemura, Hirohisa Sato). Now it is 18.1 mag (July 9, J. Jahn). It is predicted to stay observable at 18 mag for a long time from 2019 to 2021. But actually, it may be fainter than this ephemeris.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  18 31.72  -24 35.3   6.983   7.731   134   17.7  20:55 (180, 80)  
Aug. 22  18 29.36  -25  5.4   7.078   7.736   127   17.8  20:25 (180, 80)  

* 173P/Mueller 5

It is observable at 17-18 mag for a long time from late 2019 to early 2021. It will fade out before it passes the perihelion.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15   5 32.19   16  2.9   5.109   4.674    59   17.8   5:15 (224, 26)  
Aug. 22   5 37.52   16  8.5   5.004   4.663    64   17.8   5:07 (221, 28)  

* C/2020 O2 ( Amaral )

Now it is 17.4 mag (July 26, J. Drummond). It will brighten up to 16.5 mag in 2021 summer. In the Southern Hemisphere, it stays observable for a while. In the Northern Hemisphere, it is not observable until 2021 February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 15  14 31.94  -49 37.7   5.585   5.680    90   17.8  18:54 ( 47, 64)  
Aug. 22  14 36.66  -48 35.8   5.654   5.654    84   17.8  18:58 ( 52, 60)  

---------------------------------------------------------------------

Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.