Table 1 Summary of simulation parameters and outcomes.

From: Collisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu

case

θimp (°)

Rimp (km)

Q/Q*

Foblate

ΔTcenter (K)

Ccenter

1

30

7

0.635

0.22

+45.9

0.64

2

15

7

1.066

0.41

+104.3

0.91

3

30

9

1.481

0.48

+113.0

0.93

4

30

13

1.979

0.65

+247.7

1.00

  1. We summarize the impact parameters of the four simulations that have a similar impact speed of 5 km/s and variable impact angle (θimp) and impactor diameter (Rimp). We report the corresponding impact energy relative to the catastrophic disruption threshold (Q/Q*, see ref. 62), the fraction of reaccumulated aggregates that are oblate spheroids (arbitrarily defined as having a minor-to-major axis ratio > 0.75, Foblate), the impact-induced change in temperature at the center (ΔTcenter) and the degree of compaction at the center (Ccenter). An object is fully compacted (no microporosity) when C = 1 and has its original microporosity when C = 0. The center is defined as the subset of material originally within a radius of 5 km from the center of mass of the parent body.
Back to article page