← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-12-16 Sat | 32 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:40 | 11.5 | 1% | 52.1° |
| 2028-12-17 Sun | 30 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:35 | 11.5 | 4% | 45.3° |
| 2028-12-18 Mon | 27 | — | unknown | 18:35–19:40 (good, 1.08 h) | 71.1° 14:30 | 11.51 | 9% | 41.0° |
| 2028-12-19 Tue | 24 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:30 | 11.51 | 15% | 39.8° |
| 2028-12-20 Wed | 20 | — | unknown | 18:35–19:20 (good, 0.75 h) | 71.1° 14:25 | 11.51 | 23% | 41.9° |
| 2028-12-21 Thu | 17 | — | unknown | 18:35–19:10 (good, 0.58 h) | 71.1° 14:20 | 11.51 | 32% | 46.5° |
| 2028-12-22 Fri | 14 | — | unknown | 18:35–19:00 (good, 0.42 h) | 71.1° 14:15 | 11.51 | 41% | 52.9° |
| 2028-12-23 Sat | 11 | — | unknown | 18:40–18:45 (good, 0.08 h) | 71.1° 14:15 | 11.5 | 50% | 60.5° |
| 2028-12-24 Sun | 10 | — | unknown | 18:40–19:40 (marginal, 1.0 h) | 71.1° 14:10 | 11.5 | 60% | 68.8° |
| 2028-12-25 Mon | 9 | — | unknown | 18:40–19:35 (marginal, 0.92 h) | 71.1° 14:05 | 11.5 | 69% | 77.7° |
| 2028-12-26 Tue | 9 | — | unknown | 18:40–19:30 (marginal, 0.83 h) | 71.1° 14:00 | 11.49 | 77% | 86.9° |
| 2028-12-27 Wed | 8 | — | unknown | 18:40–19:30 (marginal, 0.83 h) | 71.1° 13:55 | 11.49 | 85% | 96.4° |
| 2028-12-28 Thu | 8 | — | unknown | 18:05–19:25 (marginal, 1.33 h) | 71.1° 13:55 | 11.48 | 92% | 106.0° |
| 2028-12-29 Fri | 9 | — | unknown | 18:10–19:25 (marginal, 1.25 h) | 71.1° 13:50 | 11.47 | 96% | 115.4° |
| 2028-12-30 Sat | 8 | — | unknown | 18:10–19:20 (marginal, 1.17 h) | 71.1° 13:45 | 11.47 | 99% | 124.4° |
| 2028-12-31 Sun | 7 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.1° 13:40 | 11.46 | 100% | 132.2° |
| 2029-01-01 Mon | 6 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.45 | 98% | 137.8° |
| 2029-01-02 Tue | 6 | — | unknown | 18:10–18:40 (marginal, 0.5 h) | 71.1° 13:35 | 11.44 | 94% | 140.2° |
| 2029-01-03 Wed | 5 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:30 | 11.42 | 87% | 138.4° |
| 2029-01-04 Thu | 4 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:25 | 11.41 | 78% | 133.0° |
| 2029-01-05 Fri | 3 | — | unknown | 18:15–18:30 (marginal, 0.25 h) | 71.1° 13:20 | 11.4 | 68% | 125.0° |
| 2029-01-06 Sat | 2 | — | unknown | 18:15–18:25 (marginal, 0.17 h) | 71.1° 13:20 | 11.38 | 57% | 115.6° |
| 2029-01-07 Sun | 2 | — | unknown | 18:15–18:20 (marginal, 0.08 h) | 71.1° 13:15 | 11.37 | 46% | 105.3° |
| 2029-01-08 Mon | 1 | — | unknown | — | 71.1° 13:10 | 11.35 | 35% | 94.6° |
| 2029-01-09 Tue | 1 | — | unknown | — | 71.1° 13:05 | 11.34 | 24% | 84.0° |
| 2029-01-10 Wed | 1 | — | unknown | — | 71.1° 13:00 | 11.32 | 16% | 73.6° |
| 2029-01-11 Thu | 1 | — | unknown | — | 71.1° 13:00 | 11.3 | 8% | 63.7° |
| 2029-01-12 Fri | 0 | — | unknown | — | 71.1° 12:55 | 11.28 | 4% | 54.8° |
| 2029-01-13 Sat | 0 | — | unknown | — | 71.1° 12:50 | 11.26 | 1% | 47.4° |
| 2029-01-14 Sun | 0 | — | unknown | — | 71.1° 12:45 | 11.24 | 0% | 42.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-12-16&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.