← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-01-22 Sat | 0 | — | unknown | — | 71.1° 12:20 | 11.07 | 12% | 62.5° |
| 2028-01-23 Sun | 0 | — | unknown | — | 71.1° 12:15 | 11.04 | 7% | 54.7° |
| 2028-01-24 Mon | 0 | — | unknown | — | 71.1° 12:10 | 11.01 | 3% | 48.3° |
| 2028-01-25 Tue | 0 | — | unknown | — | 71.1° 12:05 | 10.99 | 0% | 43.7° |
| 2028-01-26 Wed | 0 | — | unknown | — | 71.1° 12:00 | 10.96 | 0% | 41.5° |
| 2028-01-27 Thu | 0 | — | unknown | — | 71.1° 11:55 | 10.93 | 2% | 42.0° |
| 2028-01-28 Fri | 1 | — | unknown | — | 71.1° 11:50 | 10.9 | 5% | 45.2° |
| 2028-01-29 Sat | 1 | — | unknown | — | 71.1° 11:45 | 10.87 | 10% | 50.4° |
| 2028-01-30 Sun | 1 | — | unknown | — | 71.1° 11:40 | 10.84 | 16% | 57.2° |
| 2028-01-31 Mon | 1 | — | unknown | — | 71.1° 11:40 | 10.81 | 23% | 65.0° |
| 2028-02-01 Tue | 1 | — | unknown | — | 71.1° 11:35 | 10.77 | 32% | 73.6° |
| 2028-02-02 Wed | 1 | — | unknown | — | 71.1° 11:30 | 10.74 | 41% | 82.6° |
| 2028-02-03 Thu | 2 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:25 | 10.71 | 51% | 92.1° |
| 2028-02-04 Fri | 2 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:25 | 10.67 | 62% | 101.8° |
| 2028-02-05 Sat | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.64 | 72% | 111.5° |
| 2028-02-06 Sun | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.6 | 81% | 120.9° |
| 2028-02-07 Mon | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.57 | 90% | 129.3° |
| 2028-02-08 Tue | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:05 | 10.53 | 96% | 135.7° |
| 2028-02-09 Wed | 4 | — | unknown | 05:35–05:50 (marginal, 0.25 h) | 71.1° 11:05 | 10.49 | 99% | 138.6° |
| 2028-02-10 Thu | 4 | — | unknown | 05:30–05:50 (marginal, 0.33 h) | 71.1° 11:00 | 10.46 | 100% | 137.0° |
| 2028-02-11 Fri | 5 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:55 | 10.42 | 97% | 131.4° |
| 2028-02-12 Sat | 5 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:50 | 10.38 | 92% | 123.1° |
| 2028-02-13 Sun | 6 | — | unknown | 05:20–05:50 (marginal, 0.5 h) | 71.1° 10:45 | 10.34 | 84% | 113.5° |
| 2028-02-14 Mon | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:45 | 10.3 | 75% | 103.2° |
| 2028-02-15 Tue | 6 | — | unknown | 05:10–05:45 (marginal, 0.58 h) | 71.1° 10:40 | 10.27 | 65% | 92.9° |
| 2028-02-16 Wed | 7 | — | unknown | 05:05–05:45 (marginal, 0.67 h) | 71.1° 10:35 | 10.23 | 54% | 82.9° |
| 2028-02-17 Thu | 8 | — | unknown | 05:05–06:15 (marginal, 1.17 h) | 71.1° 10:30 | 10.18 | 44% | 73.3° |
| 2028-02-18 Fri | 9 | — | unknown | 05:35–05:40 (good, 0.08 h) | 71.1° 10:30 | 10.14 | 34% | 64.4° |
| 2028-02-19 Sat | 10 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:25 | 10.1 | 25% | 56.4° |
| 2028-02-20 Sun | 12 | — | unknown | 05:25–05:40 (good, 0.25 h) | 71.1° 10:20 | 10.06 | 17% | 49.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-01-22&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.