← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-03-10 Thu | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 79.2° 14:45 | 9.23 | 100% | 133.9° |
| 2039-03-11 Fri | 9 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.2° 14:40 | 9.18 | 98% | 145.1° |
| 2039-03-12 Sat | 10 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.2° 14:35 | 9.13 | 93% | 153.8° |
| 2039-03-13 Sun | 9 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.2° 14:35 | 9.08 | 86% | 156.5° |
| 2039-03-14 Mon | 7 | — | unknown | 19:30–20:30 (marginal, 1.0 h) | 79.2° 14:30 | 9.03 | 77% | 151.5° |
| 2039-03-15 Tue | 6 | — | unknown | 19:30–20:00 (marginal, 0.5 h) | 79.2° 14:25 | 8.98 | 67% | 141.7° |
| 2039-03-16 Wed | 5 | — | unknown | 19:30–19:55 (marginal, 0.42 h) | 79.2° 14:20 | 8.93 | 56% | 130.1° |
| 2039-03-17 Thu | 4 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.2° 14:15 | 8.88 | 44% | 117.9° |
| 2039-03-18 Fri | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.2° 14:15 | 8.83 | 33% | 105.4° |
| 2039-03-19 Sat | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 79.2° 14:10 | 8.78 | 24% | 92.9° |
| 2039-03-20 Sun | 1 | — | unknown | 19:35–19:40 (marginal, 0.08 h) | 79.2° 14:05 | 8.73 | 15% | 80.6° |
| 2039-03-21 Mon | 1 | — | unknown | — | 79.2° 14:00 | 8.68 | 8% | 68.6° |
| 2039-03-22 Tue | 1 | — | unknown | — | 79.2° 14:00 | 8.63 | 4% | 57.0° |
| 2039-03-23 Wed | 1 | — | unknown | — | 79.2° 13:55 | 8.57 | 1% | 46.0° |
| 2039-03-24 Thu | 0 | — | unknown | — | 79.2° 13:50 | 8.52 | 0% | 36.0° |
| 2039-03-25 Fri | 0 | — | unknown | — | 79.2° 13:45 | 8.47 | 2% | 27.9° |
| 2039-03-26 Sat | 0 | — | unknown | — | 79.2° 13:40 | 8.42 | 5% | 23.6° |
| 2039-03-27 Sun | 0 | — | unknown | — | 79.2° 14:40 | 8.36 | 10% | 24.7° |
| 2039-03-28 Mon | 0 | — | unknown | — | 79.2° 14:35 | 8.31 | 16% | 30.5° |
| 2039-03-29 Tue | 0 | — | unknown | — | 79.2° 14:30 | 8.25 | 23% | 38.9° |
| 2039-03-30 Wed | 0 | — | unknown | — | 79.2° 14:25 | 8.2 | 32% | 48.6° |
| 2039-03-31 Thu | 0 | — | unknown | — | 79.2° 14:20 | 8.15 | 41% | 58.9° |
| 2039-04-01 Fri | 0 | — | unknown | — | 79.2° 14:20 | 8.09 | 50% | 69.8° |
| 2039-04-02 Sat | 0 | — | unknown | — | 79.2° 14:15 | 8.04 | 60% | 80.9° |
| 2039-04-03 Sun | 0 | — | unknown | — | 79.2° 14:10 | 7.98 | 70% | 92.5° |
| 2039-04-04 Mon | 0 | — | unknown | — | 79.2° 14:05 | 7.93 | 79% | 104.4° |
| 2039-04-05 Tue | 0 | — | unknown | — | 79.2° 14:05 | 7.87 | 87% | 116.5° |
| 2039-04-06 Wed | 0 | — | unknown | — | 79.2° 14:00 | 7.81 | 93% | 128.7° |
| 2039-04-07 Thu | 0 | — | unknown | — | 79.2° 13:55 | 7.76 | 98% | 140.5° |
| 2039-04-08 Fri | 0 | — | unknown | — | 79.2° 13:50 | 7.7 | 100% | 150.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-03-10&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.