Relevant Timescales

Table 1
Porbit rmean nH2 Rmajor T J
[years] [gm cm-3] [cm-3] [AU] [°K] [g cm2 s-1]
--------- --------------- --------------- --------- --------- ---------------
1 1.5 × 10-7 4.5 × 1016 1.0 4860 2.5(52)
10 1.5 × 10-9 4.5 × 1014 4.6 1050 5.5(52)
100 1.5 × 10-11 4.5 × 1012 21 224 1.2(53)
250 2.4 × 10-12 7.3 × 1011 39 122 1.6(53)
1000 1.5 × 10-13 4.5 × 1010 99 49 2.5(53)



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