Key for Habitable Zone table headings
The table columns summarize basic planetary properties, orbital geometry, the percentage of orbital phase spent within the conservative and optimistic Habitable Zone boundaries, and four equilibrium-temperature estimates.
| Column | Meaning |
|---|---|
| Planet | Name of planet. |
| Mp | Planet mass in Jupiter masses. |
| Rp | Planet radius in Jupiter radii. |
| P | Orbital period in days. |
| e | Orbital eccentricity. |
| ω | Argument of periastron in degrees. |
| tHZc | Percentage of the planetary orbital phase spent within the conservative Habitable Zone. |
| tHZo | Percentage of the planetary orbital phase spent within the optimistic Habitable Zone. |
| Teqa | Planetary equilibrium temperature estimate for temperature model a. |
| Teqb | Planetary equilibrium temperature estimate for temperature model b. |
| Teqc | Planetary equilibrium temperature estimate for temperature model c. |
| Teqd | Planetary equilibrium temperature estimate for temperature model d. |
Temperature models
The temperature columns provide idealized equilibrium-temperature diagnostics. They are not surface-temperature predictions and do not include greenhouse warming. The movie page refers to the well-mixed model, which assumes efficient redistribution of absorbed stellar energy over the planetary surface.
These quantities should be treated as comparative orbital-energy indicators rather than habitability verdicts.
Habitable Zone models
The conservative and optimistic Habitable Zone boundaries follow the methodology described on the About page. The conservative model uses the Runaway Greenhouse and Maximum Greenhouse criteria, while the optimistic model extends those limits using the Recent Venus and Early Mars criteria.