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Table 3

Initial porosity φ0, initial thermal conductivity k0, average final porosity , initial planetesimal radius R0, final planetesimal radius Rf, thickness of the porous layer Dp, central maximum temperature Tmax, and central pressure Pc at .

SCP ORP RHP BCCP
φ 0 % 47.64 39.54 25.95 31.98
k 0 W m-1 K-1 0.088 0.14 0.32 0.22
 Screep % 31.91 32.64 25.81 30.55
R 0 km 6.20 5.91 5.53 5.69
R f km 5.68 5.70 5.52 5.65
D p km 2.08 3.25 5.52 5.65
T max K 934 905 808 869
P c MPa 0.021 0.025 0.033 0.029
I T K 762−925 750−905 740 − 745 −
t comp Ma 0.44 0.53 1.07 1.51
 Spar % 16.83 19.10 21.21 20.89
R 0 km 6.20 5.91 5.53 5.69
R f km 5.32 5.37 5.41 5.41
D p km 1.15 1.59 3.42 2.30
T max K 734 727 706 717
P c MPa 0.021 0.025 0.033 0.029
I T K 650−700 650−700 650−700 650−700
t comp Ma 0.08 0.08 0.15 0.10
 Bcreep % 25.16 21.15 15.96 17.72
R 0 km 62.04 59.13 55.27 56.85
R f km 55.07 54.12 52.98 53.36
D p km 22.07 23.70 25.50 20.30
T max K 739 739 738 739
P c MPa 2.1 2.5 3.3 2.9
I T K 662−739 655−739 645−738 650−738
t comp Ma 9.67 7.89 6.12 5.28
 Bpar % 9.07 9.19 8.68 9.06
R 0 km 62.04 59.13 55.27 56.85
R f km 51.61 51.63 51.54 51.61
D p km 5.50 6.60 9.50 8.00
T max K 736 735 734 735
P c MPa 2.1 2.5 3.3 2.9
I T K 650−700 650−700 650−700 650−700
t comp Ma 0.86 0.86 0.86 0.86

Notes. The lower value of the temperature interval IT defines the temperature at which the central porosity changed by 1% of φ0 and the upper value defines the temperature at which φ = 10-5 was reached. The compaction time tcomp is the time between the onset and the end of porosity loss in the centre. Considered are bodies with terminal radii of 5 km (Screep, Spar) and 50 km (Bcreep, Bpar). Thereby, compaction is modelled either via creep (Screep, Bcreep) or as a T-dependent process only (Spar, Bpar). For each case four packings are considered with the corresponding initial porosity and radius, as well as the corresponding computation of the effective stress.

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