Table 1 Parameters in the asteroid thermochronologic code and prior distributions used in the Bayesian inversion

 t_ss

Solar age (oldest CAIs)

4,567.3 Ma

²⁶

 T_m

Midplane temperature

\(\log{\mathcal{N}}(5.4,0.5)\approx210\,{\mathrm{K}}\)

⁵³

 ²⁶Al_o

Initial ²⁶Al/²⁷Al

5.23 ± 0.06 × 10⁻⁵

⁹⁴

 [Al]

Al abundance

\(\log{\mathcal{N}}(-4.6,0.1)\approx1.0\,{\mathrm{wt\%}}\)

⁸²

 T_c

Ar closure temperature

\(\log{\mathcal{N}}(6.2,0.3)\approx 490\,{\mathrm{K}}\)

^{43,59,84,95,96}

 R

Radius

\(\log{\mathcal{N}}(11.9,0.2)\approx 150\,{\mathrm{km}}\)

^{70,71,72,73,84,97}

 t_a

Time of accretion

\(\log{\mathcal{N}}(0.70,0.08)\approx 2.0\,{\mathrm{Myr}}_{\mathrm{{ss}}}\)

^{52,70,71,72,73,84,97}

 ρ

Bulk density

\(\log{\mathcal{N}}(8.12,0.04)\approx 3,400\,{\mathrm{kg}}\,{\mathrm{m}}^{-3}\)

^74,75

 C_p

Specific heat capacity

\(\log{\mathcal{N}}(6.73,0.08)\approx 850\, {\mathrm{J}}\,{\mathrm{kg}}^{-1}\, {\mathrm{K}}^{-1}\)

⁷⁶

 k

Thermal conductivity

\(\log{\mathcal{N}}(0.3,0.6)\approx 1.4\,{\mathrm{W}}\,{\mathrm{m}}^{-1}\,{\mathrm{K}}^{-1}\)

^77,78,79

 t_o

Start time

\({\mathcal{U}}[0,{t}_{{\mathrm{max}}}]\, ({\mathrm{Myr}}_{\mathrm{{ss}}})\)

 F_o

Initial flux

\({\mathcal{U}}[0,1{0}^{4}]\,({\mathrm{Myr}}^{-1})\)

 τ

e-folding time

\({\mathcal{U}}[0,{t}_{{\mathrm{max}}}]\,({\mathrm{Myr}})\)