← 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. |
|---|---|---|---|---|---|---|---|---|
| 2029-03-28 Wed | 9 | — | unknown | 21:20–22:15 (marginal, 0.92 h) | 42.9° 18:30 | 8.28 | 98% | 86.7° |
| 2029-03-29 Thu | 11 | — | unknown | 20:45–22:20 (marginal, 1.58 h) | 42.9° 18:30 | 8.23 | 100% | 99.9° |
| 2029-03-30 Fri | 11 | — | unknown | 21:20–21:30 (good, 0.17 h) | 42.9° 18:25 | 8.18 | 99% | 112.9° |
| 2029-03-31 Sat | 12 | — | unknown | 21:25–21:40 (good, 0.25 h) | 42.9° 18:20 | 8.12 | 95% | 125.3° |
| 2029-04-01 Sun | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:15 | 8.07 | 88% | 136.4° |
| 2029-04-02 Mon | 10 | — | unknown | 21:25–21:30 (good, 0.08 h) | 42.9° 18:15 | 8.01 | 80% | 145.1° |
| 2029-04-03 Tue | 7 | — | unknown | 20:55–22:00 (marginal, 1.08 h) | 42.9° 18:10 | 7.96 | 70% | 149.7° |
| 2029-04-04 Wed | 6 | — | unknown | 21:30–21:55 (marginal, 0.42 h) | 42.9° 18:05 | 7.9 | 59% | 148.9° |
| 2029-04-05 Thu | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:00 | 7.85 | 49% | 143.5° |
| 2029-04-06 Fri | 4 | — | unknown | 21:30–21:45 (marginal, 0.25 h) | 42.9° 17:55 | 7.79 | 39% | 135.4° |
| 2029-04-07 Sat | 3 | — | unknown | 21:35–21:45 (marginal, 0.17 h) | 42.9° 17:55 | 7.73 | 29% | 126.1° |
| 2029-04-08 Sun | 3 | — | unknown | 21:00–21:10 (marginal, 0.17 h) | 42.9° 17:50 | 7.68 | 21% | 116.2° |
| 2029-04-09 Mon | 2 | — | unknown | 21:00–21:05 (marginal, 0.08 h) | 42.9° 17:45 | 7.62 | 14% | 106.0° |
| 2029-04-10 Tue | 1 | — | unknown | — | 42.9° 17:40 | 7.56 | 8% | 95.8° |
| 2029-04-11 Wed | 1 | — | unknown | — | 42.9° 17:35 | 7.51 | 4% | 85.5° |
| 2029-04-12 Thu | 1 | — | unknown | — | 42.9° 17:35 | 7.45 | 1% | 75.3° |
| 2029-04-13 Fri | 1 | — | unknown | — | 42.9° 17:30 | 7.39 | 0% | 65.3° |
| 2029-04-14 Sat | 0 | — | unknown | — | 42.9° 17:25 | 7.33 | 1% | 55.6° |
| 2029-04-15 Sun | 0 | — | unknown | — | 42.9° 17:20 | 7.28 | 4% | 46.5° |
| 2029-04-16 Mon | 0 | — | unknown | — | 42.9° 17:20 | 7.22 | 8% | 38.4° |
| 2029-04-17 Tue | 0 | — | unknown | — | 42.9° 17:15 | 7.16 | 14% | 32.4° |
| 2029-04-18 Wed | 0 | — | unknown | — | 42.9° 17:10 | 7.1 | 22% | 29.8° |
| 2029-04-19 Thu | 0 | — | unknown | — | 42.9° 17:05 | 7.05 | 31% | 31.8° |
| 2029-04-20 Fri | 0 | — | unknown | — | 42.9° 17:00 | 6.99 | 40% | 37.8° |
| 2029-04-21 Sat | 0 | — | unknown | — | 42.9° 17:00 | 6.93 | 51% | 46.6° |
| 2029-04-22 Sun | 0 | — | unknown | — | 42.9° 16:55 | 6.87 | 62% | 57.1° |
| 2029-04-23 Mon | 0 | — | unknown | — | 42.9° 16:50 | 6.81 | 73% | 68.7° |
| 2029-04-24 Tue | 0 | — | unknown | — | 42.9° 16:45 | 6.75 | 82% | 81.1° |
| 2029-04-25 Wed | 0 | — | unknown | — | 42.9° 16:40 | 6.7 | 90% | 93.9° |
| 2029-04-26 Thu | 0 | — | unknown | — | 42.9° 16:40 | 6.64 | 96% | 106.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2029-03-28&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.