C/1980 Y1 Bradfield

1980年12月17日にオーストラリアのA.Bradfieldは、さそり座に６等の彗星を発見した。これは彼にとって11番目の彗星（iauc3554）。続くiauc3555に発表された軌道によると、80年12月29日に太陽に0.26天文単位まで接近することがわかり、日本では１月にわし座へ移動してきて夕空に見えました。

1751 C/1980Y1 Bradfield = 1980t 810106 180700 10s 55F2.8 Tri-X
1752 C/1980Y1 Bradfield = 1980t 810106 180720 10s 55F2.8 Tri-X
1753 C/1980Y1 Bradfield = 1980t 810106 182225 30s 300F4 Tri-X
1754 C/1980Y1 Bradfield = 1980t 810106 182325 30s 300F4 Tri-X
1772 C/1980Y1 Bradfield = 1980t 810108 182230 0.5 300F5.6 Fujichrome400
1773 C/1980Y1 Bradfield = 1980t 810108 182315 0.7 300F5.6 Fujichrome400
1774 C/1980Y1 Bradfield = 1980t 810108 182410 0.3 300F5.6 Fujichrome400
1775 C/1980Y1 Bradfield = 1980t 810108 182445 1 300F5.6 Fujichrome400
1776 C/1980Y1 Bradfield = 1980t 810108 182600 1 300F5.6 Fujichrome400
1777 C/1980Y1 Bradfield = 1980t 810108 182715 1.7 300F5.6 Fujichrome400
1778 C/1980Y1 Bradfield = 1980t 810108 183000 3 300F4 Fujichrome400
1779 C/1980Y1 Bradfield = 1980t 810108 183445 2 300F4 Fujichrome400
1780 C/1980Y1 Bradfield = 1980t 810108 183710 1 200F5.6 Tri-X
1781 C/1980Y1 Bradfield = 1980t 810108 183830 1 200F4 Tri-X
1782 C/1980Y1 Bradfield = 1980t 810108 183940 2 200F4 Tri-X
1783 C/1980Y1 Bradfield = 1980t 810108 184500 1 300F4 Tri-X
1787 C/1980Y1 Bradfield = 1980t 810108 181450 10s 200F4 Sakuracolor400
1788 C/1980Y1 Bradfield = 1980t 810108 181505 10s 200F4 Sakuracolor400
1789 C/1980Y1 Bradfield = 1980t 810108 182230 30s 200F5.6 Sakuracolor400
1790 C/1980Y1 Bradfield = 1980t 810108 182315 40s 200F5.6 Sakuracolor400
1791 C/1980Y1 Bradfield = 1980t 810108 182410 20s 200F5.6 Sakuracolor400
1792 C/1980Y1 Bradfield = 1980t 810108 182445 1 200F5.6 Sakuracolor400
1793 C/1980Y1 Bradfield = 1980t 810108 182600 1 200F5.6 Sakuracolor400
1794 C/1980Y1 Bradfield = 1980t 810108 182715 2.7 200F5.6 Sakuracolor400
1795 C/1980Y1 Bradfield = 1980t 810108 183000 3 200F4 Sakuracolor400
1785 C/1980Y1 Bradfield = 1980tと月 810108 180945 10s 55F2.8 Sakuracolor400
1786 C/1980Y1 Bradfield = 1980tと月 810108 181000 15s 55F2.8 Sakuracolor400