In: Physics
Halley's comet, which passes around the Sun every 76 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823
the mass of Halley's comet to be 9.8�1014kg
perihelion distance r = 8.823�10 10m
Speed at perinelion point v = 54.6km/s
= 54.6 x 10 3 m / s
Aphelion distance r ' = 6.152�10 12m
Speed at aphelion v ' = 783m/s
The angular momentum of Halley's comet at perihelion L = mv r
= 4.72 x 10 30 kg m 2 / s
The angular momentum of Halley's comet at aphelion L ' = mv' r '
= 4.72 x 10 30 kg m 2 / s
i.e., angular momentum is conserved