Table 3
Parameters defining the reference simulation.
| Parameter (units) | Value |
|
|
|
| Orbital and rotational | |
|
|
|
| Ellipticity | 0.99508 |
| Perihelion argument (°) | 130.589 |
| Inclination (°) | 89.43 |
| Ascending node longitude (°) | 282.47085 |
| Perihelion distance (AU) | 0.91413 |
| Rotation period (h) | 10.34 |
| Rotation axis inclination (°) | 84 |
| Rotation axis argument (°) | 60 |
|
|
|
| Structural and compositional | |
| Dust-to-ice ratio | 1 |
| Trapped CO (% of volatile mass) | 20% |
| Initial bulk density (kg m-3) | 500 |
| Compact dust density(a) (kg m-3) | 3250 |
| Compact H2O density(b) (kg m-3) | 920 |
| Compact CO density(a) (kg m-3) | 920 |
| Dust distribution | Dist. 2 |
| Efficiency | 3 |
|
|
|
| Thermal | |
| Albedo | 0.05 |
| Emissivity | 0.95 |
| Net crystallization heat (J kg-1) | 90000 |
| Specific heat of crystalline water ice(a) (J kg-1 K-1) | 1610 |
| Specific heat of amorphous water ice(a) (J kg-1 K-1) | 1610 |
| Specific heat of CO ice(a) (J kg-1 K-1) | 2010 |
| Specific heat of dust(a) (J kg-1 K-1) | 1300 |
| Specific heat of H2O vapor(a) (J kg-1 K-1) | 1610 |
| Specific heat of CO vapor(a) (J kg-1 K-1) | 2010 |
| Latent heat of sublimation of water(a) (J kg-1) | 2.84 × 106 |
| Latent heat of sublimation of CO(a) (J kg-1) | 2.27 × 105 |
| Crystalline ice conductivity(b) (Wm-1 K-1) | 567/T |
| Amorphous ice conductivity(b) (Wm-1 K-1) | 7.1 × 10-5T |
| CO ice conductivity(b) (Wm-1 K-1) | 1 × 10-4 |
| Dust conductivity(a) (Wm-1 K-1) | 10 |
| Thermal inertia (J m-2 K-1 s−1/2) | 200 |
| Hertz factor | 0.0078 |
Notes. Except for those listed in Table 2, in boldface, these are the common parameters of the whole set of simulations. The parameters tagged with the superscript (a) were taken from Huebner et al. (2006), and those with the superscript (b) from Tancredi et al. (1994). The procedence of the other parameters is described in the text.
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