← single night · whole-night plan
Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.
| night of | astronomy | weather | overall | best window | highest | dark h | Moon | Moon sep. |
|---|---|---|---|---|---|---|---|---|
| 2046-01-20 Sat | 0 | — | unknown | — | 71.1° 12:25 | 11.1 | 96% | 127.5° |
| 2046-01-21 Sun | 0 | — | unknown | — | 71.1° 12:20 | 11.08 | 100% | 134.0° |
| 2046-01-22 Mon | 0 | — | unknown | — | 71.1° 12:15 | 11.05 | 100% | 137.4° |
| 2046-01-23 Tue | 0 | — | unknown | — | 71.1° 12:10 | 11.02 | 97% | 136.6° |
| 2046-01-24 Wed | 0 | — | unknown | — | 71.1° 12:10 | 11.0 | 92% | 131.9° |
| 2046-01-25 Thu | 0 | — | unknown | — | 71.1° 12:00 | 10.97 | 84% | 124.4° |
| 2046-01-26 Fri | 0 | — | unknown | — | 71.1° 12:00 | 10.94 | 74% | 115.3° |
| 2046-01-27 Sat | 0 | — | unknown | — | 71.1° 11:50 | 10.91 | 64% | 105.5° |
| 2046-01-28 Sun | 1 | — | unknown | — | 71.1° 11:50 | 10.88 | 53% | 95.4° |
| 2046-01-29 Mon | 1 | — | unknown | — | 71.1° 11:45 | 10.85 | 42% | 85.5° |
| 2046-01-30 Tue | 1 | — | unknown | — | 71.1° 11:40 | 10.82 | 32% | 75.9° |
| 2046-01-31 Wed | 1 | — | unknown | — | 71.1° 11:35 | 10.79 | 22% | 66.9° |
| 2046-02-01 Thu | 1 | — | unknown | — | 71.1° 11:35 | 10.75 | 15% | 58.7° |
| 2046-02-02 Fri | 1 | — | unknown | — | 71.1° 11:30 | 10.72 | 8% | 51.7° |
| 2046-02-03 Sat | 2 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 71.1° 11:25 | 10.69 | 4% | 46.3° |
| 2046-02-04 Sun | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.65 | 1% | 43.1° |
| 2046-02-05 Mon | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.62 | 0% | 42.5° |
| 2046-02-06 Tue | 3 | — | unknown | 06:10–06:25 (marginal, 0.25 h) | 71.1° 11:15 | 10.58 | 1% | 44.6° |
| 2046-02-07 Wed | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.54 | 4% | 48.9° |
| 2046-02-08 Thu | 5 | — | unknown | 05:35–05:55 (marginal, 0.33 h) | 71.1° 11:05 | 10.51 | 8% | 55.0° |
| 2046-02-09 Fri | 5 | — | unknown | 06:00–06:25 (marginal, 0.42 h) | 71.1° 11:00 | 10.47 | 14% | 62.2° |
| 2046-02-10 Sat | 6 | — | unknown | 05:55–06:25 (marginal, 0.5 h) | 71.1° 10:55 | 10.43 | 21% | 70.2° |
| 2046-02-11 Sun | 6 | — | unknown | 05:25–06:20 (marginal, 0.92 h) | 71.1° 10:55 | 10.4 | 29% | 78.8° |
| 2046-02-12 Mon | 8 | — | unknown | 05:20–06:20 (marginal, 1.0 h) | 71.1° 10:50 | 10.36 | 38% | 87.8° |
| 2046-02-13 Tue | 8 | — | unknown | 05:15–06:20 (marginal, 1.08 h) | 71.1° 10:45 | 10.32 | 48% | 97.0° |
| 2046-02-14 Wed | 8 | — | unknown | 05:40–05:45 (good, 0.08 h) | 71.1° 10:40 | 10.28 | 58% | 106.2° |
| 2046-02-15 Thu | 9 | — | unknown | 05:35–05:45 (good, 0.17 h) | 71.1° 10:40 | 10.24 | 68% | 115.4° |
| 2046-02-16 Fri | 11 | — | unknown | 05:30–05:45 (good, 0.25 h) | 71.1° 10:35 | 10.2 | 78% | 124.0° |
| 2046-02-17 Sat | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:30 | 10.16 | 87% | 131.3° |
| 2046-02-18 Sun | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:25 | 10.12 | 94% | 136.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-01-20&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csvOne row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.