* * * * * 123P/West-Hartley * * * * *


Year Mn Day    MM  Mag Ref Scope Pwr coma  DC tail p.a. Obs  Site
2019  5  6.43   S 13.4 AQ  25.0L  83  1.4  2            WYA  Walcha, NSW
(Very diffuse.)
2019  5  4.02   S 12.3 AQ  20.3T 100   2   3            GON  Alto del Castro - Aralla, León
(Elongated coma.)
2019  5  3.54   S 13.4 AU  40.0L 144  1.4  3            YOS  Kita-karuizawa, Gunma
(Better visible than the previous day.)
2019  5  2.50   S 13.7 AU  40.0L 144  1.1  3            YOS  Kita-karuizawa, Gunma
2019  4 28.41   S 13.9 AQ  25.0L  83   1   3            WYA  Walcha, NSW
(Very diffuse.)
2019  4  7.38   S 12.8 AQ  25.0L  83   2   3            WYA  Walcha, NSW
(Low altitude 19.9°. Difficult, slight brightening to centre.)
2019  4  6.887  S 13.3 AQ  30.5T 139  0.8  3            DIJ  Burlage
2019  4  6.885  S 13.4 AQ  30.5T 139  0.8  4            BOU  Burlage, Germany
2019  4  2.89   S 11.5 AQ  20.3T 133   2   3            GON  Alto del Celleron - Benllera, León
2019  4  1.868  S 13.4 AQ  30.5T 139  0.9  4            BOU  Burlage, Germany
2019  4  1.866  S 13.4 AQ  30.5T 139  0.6  2/           DIJ  Burlage
2019  3 23.90   S 11.5 AQ  20.3T 100  2.5  3            GON  Alto del Castro, León
2019  3  9.94   S 11.8 AQ  20.3T 100  2.2  4            GON  Alto del Trichero, León
2019  3  5.17   S 12.3 AQ  22.0L 160  1.5  3            GOI  Araçatuba
2019  2 27.937  S 13.1 AQ  30.5T 102  1.1  4            BOU  Burlage, Germany
2019  2 27.936  S 12.9 AQ  30.5T 102   1   3            DIJ  Burlage
2019  2 24.95   S 12.4 AQ  20.3T  77  1.2  4            GON  Puerto de Aralla, León
2019  2 15.190  S 13.3 AQ  30.5T 139  1.0  4/           BOU  Burlage, Germany
(Close to star of magnitude 13.1.)
2019  2 15.188  S 12.9 AQ  30.5T 139  1.2  3/           DIJ  Burlage
2019  2 11.67   M 13.3 AQ  25.0L  83   1   6            WYA  Walcha, NSW
(Difficult due to glare from nearby star. Faintly stellar at centre, diffuse outer coma.)
2019  2  9.70   M 13.5 AQ  25.0L  83  1.3  6            WYA  Walcha, NSW
(Faint stellar central condensation, diffuse outer coma.)
2019  2  4.70   M 13.1 AQ  25.0L  83  1.4  6            WYA  Walcha, NSW
(Faintly stellar in good seeing, diffuse.)
2019  2  3.895  S 13.6 AQ  30.5T 139  0.8  3/           BOU  Burlage, Germany
2019  2  3.892  S 13.8 AQ  30.5T 139   2   4            DIJ  Burlage
2019  2  3.68   M 12.9 AQ  25.0L  83  1.7  6            WYA  Walcha, NSW
(Coma diffuse. Faint stellar central condensation, opaque inner coma.)
2019  1 28.86   V 14.6 TK  50.0L      0.4               QVA  Nykirke
2019  1 21.208  S 13.4 AQ  30.5T 139  1.5  4            DIJ  Burlage
2019  1 21.207  S 13.7 AQ  30.5T 139  1.0  4            BOU  Burlage, Germany
(Observed during total lunar eclipse.)
2019  1 14.66   M 13.4 AQ  25.0L  83  1.1  5/           WYA  Walcha, NSW
(Diffuse outer coma, small opaque centre. Appears stellar in good seeing.)
2019  1 14.06   S 12.7 AQ  20.3T 100  1.1  5            GON  Alto del Castro - Aralla, León
(In evolution after the recent minor outburst. Faint and diffuse outer coma diameter 3.5', providing m=11.2 [TK]. Condensed inner coma.
Near-stellar central condensation, m2=14.2: [AQ]. Nearby field stars checked in DSS. Limiting stellar magnitude fainter than 14.5 [AQ].)
2019  1 12.61   M 13.8 AQ  25.0L  83  0.9  6            WYA  Walcha, NSW
(Difficult. Close to stars. Outer coma diffuse and semi-opaque, centre sometimes stellar in good seeing. Low altitude 14.4°.)

2004  3 26.023  S 13.6 SK  31.0J 143  1.2  2/           DIJ  Sint Annen
2004  3 26.017  S 13.7 SK  31.0J 143  1.0  3/           BOU  Sint Annen
2004  2 21.198  S 13.6 SK  31.0J 143  0.7  2            DIJ  Sint Annen
2004  2 21.183  S 13.8 SK  31.0J 143  0.8  3            BOU  Sint Annen
(Comet observed as a faint, somewhat condended object near calculated position.
No motion detected due to position near stationary point.)
2004  2 21.02   S[13.7 HS  20.3L 125 !0.5               GUZ  Krosno