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- W2052519491 abstract "High-resolution photographs of the long-period comet Bradfield 1979X taken in blue as well as in red light were digitized and morphologically analysed. The photographs were taken with the ESO 3.6-m Telescope at La Silla, Chile, on 23 and 24 January 1980, when the comet had a geocentric distance of Δ = 0.2 AU. They are therefore among the most highly resolved observations ever obtained of a cometary coma. A change in the appearance of the plasma tail near the nucleus between 23 and 24 January 1980 can clearly be observed. We interpret this distortion as the result of a possible disconnection event (DE). The starting time of the DE has been determined to 23 January 1980, between 4: 00 UT and 5: 00 UT. The solar wind and interplanetary magnetic field properties for January 1980 were investigated to search for a possible association of the DE to variations in the solar wind velocity and in the interplanetary magnetic field (IMF). The solar wind velocity remained fairly constant and pretty low during the time relevant for the DE. Altough the evidence is not unambiguous, a slight possiblity for an asociation to a variation in the IMF has been found. In addition to the DE, the structural enhanced images show indications for an enhanced abundance of gas and dust particles in sunward direction, which could be the result of an asymmetric outgassing from the nucleus." @default.
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- W2052519491 date "1994-08-01" @default.
- W2052519491 modified "2023-09-27" @default.
- W2052519491 title "A possible disconnection event in the inner coma of comet Bradfield 1979X" @default.
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- W2052519491 doi "https://doi.org/10.1016/0032-0633(94)90040-x" @default.
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