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Table 1
Phase angle α vs. observational epoch and orbital inclination.
| i | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| 0° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° |
| 15° | 90° | 79° | 75° | 79° | 90° | 101° | 105° | 101° |
| 30° | 90° | 68° | 60° | 68° | 90° | 112° | 120° | 112° |
| 45° | 90° | 55° | 45° | 55° | 90° | 125° | 135° | 125° |
| 60° | 65° |  |
|
65° | 115° | 142° | 142° | 115° |
| 75° | 67° | |
|
67° | 113° | 142° | 142° | 113° |
| 90° | 67° | |
|
67° | 113° | 142° | 142° | 113° |
Notes. The symbol indicates that α = 38° and that the rainbow feature should be visible (provided the planet has liquid water clouds). See Fig. 2 for the geometries at the given orbital inclination angles i.
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