The Breakup of C/1999 S4 (Linear), Days 0-10

Kidger, M. R.
Referencia bibliográfica

Earth, Moon, and Planets, v. 90, Issue 1, p. 157-165 (2002).

Fecha de publicación:
3
2002
Número de autores
1
Número de autores del IAC
1
Número de citas
5
Número de citas referidas
4
Descripción
The evolution of the morphology of C/1999 S4 (LINEAR) is examined from a series of images taken from shortly before the disruption of the nucleus until 10 days afterwards. This is combined with light curve data to provide a unique documentation of the early evolution of the disruption event. Neither images from the 1-m Jacobus Kapteyn Telescope nor the 2.5-m Isaac Newton Telescope at the Roque de los Muchachos Observatory (La Palma, Canary Islands, Spain) show no evidence of bright sub-nuclei, although the presence of a well-defined stable lance-point structure in the head of the comet indicates that a dust and gas producing source remained active in this region. The centre of brightness of the coma moved in the anti-solar direction at a few tens of metres per second after disruption indicating that it was a mainly dust structure. The contrast in the fragmentation history of comets such as C/1999 S4, C/2001 A2 and 141P/Machholz 2 suggests that there is a wide variation in nucleus properties from highly unstable and loosely bound rubble piles to relatively consolidated conglomerates.