|• C/1999 S4(LINEAR)
LINEAR 1999 S4 is now fairly high in the pre-dawn sky and easy to observe. In the 20cm refractor at 60x, it appeared nebulous with a faint tail on the upper side. The magnitude was 9.3 at 3:20 am in the morning. The comet is about 1.7 A.U. from the earth and the tail extends in the opposite direction from the sun. At the time of the late-July approach we may be able to see a tail longer than 1 degree. Judging from the above observation I think there is a possibility that the comet may become visible to the naked eye.
The photo was taken by the 60cm reflector for a 10-minute exposure. Color photos were taken as well today.
60cm reflector at Geisei Observatory
Copyright (C) 2000 Tsutomu Seki.