← 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. |
|---|---|---|---|---|---|---|---|---|
| 2033-08-20 Sat | 1 | — | unknown | — | 42.9° 09:00 | 6.95 | 16% | 29.7° |
| 2033-08-21 Sun | 1 | — | unknown | — | 42.9° 08:55 | 7.0 | 9% | 38.5° |
| 2033-08-22 Mon | 1 | — | unknown | — | 42.9° 08:50 | 7.06 | 4% | 48.6° |
| 2033-08-23 Tue | 2 | — | unknown | — | 42.9° 08:45 | 7.12 | 1% | 59.4° |
| 2033-08-24 Wed | 2 | — | unknown | 05:30–05:40 (marginal, 0.17 h) | 42.9° 08:45 | 7.18 | 0% | 70.4° |
| 2033-08-25 Thu | 4 | — | unknown | 05:25–05:40 (marginal, 0.25 h) | 42.9° 08:40 | 7.23 | 1% | 81.4° |
| 2033-08-26 Fri | 4 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.29 | 4% | 92.3° |
| 2033-08-27 Sat | 5 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.35 | 8% | 103.2° |
| 2033-08-28 Sun | 7 | — | unknown | 04:40–05:05 (marginal, 0.42 h) | 42.9° 08:25 | 7.4 | 14% | 113.9° |
| 2033-08-29 Mon | 8 | — | unknown | 04:40–05:45 (marginal, 1.08 h) | 42.9° 08:25 | 7.46 | 21% | 124.4° |
| 2033-08-30 Tue | 9 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:20 | 7.52 | 30% | 134.5° |
| 2033-08-31 Wed | 10 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.57 | 39% | 143.9° |
| 2033-09-01 Thu | 12 | — | unknown | 04:55–05:10 (good, 0.25 h) | 42.9° 08:10 | 7.63 | 48% | 151.7° |
| 2033-09-02 Fri | 15 | — | unknown | 04:55–05:15 (good, 0.33 h) | 42.9° 08:05 | 7.68 | 58% | 156.0° |
| 2033-09-03 Sat | 16 | — | unknown | 04:50–05:15 (good, 0.42 h) | 42.9° 08:05 | 7.74 | 68% | 154.5° |
| 2033-09-04 Sun | 17 | — | unknown | 04:45–05:15 (good, 0.5 h) | 42.9° 08:00 | 7.79 | 78% | 147.6° |
| 2033-09-05 Mon | 21 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:55 | 7.85 | 86% | 137.4° |
| 2033-09-06 Tue | 21 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:50 | 7.9 | 93% | 125.4° |
| 2033-09-07 Wed | 18 | — | unknown | 04:45–05:20 (good, 0.58 h) | 42.9° 07:50 | 7.96 | 98% | 112.5° |
| 2033-09-08 Thu | 15 | — | unknown | 04:55–05:20 (good, 0.42 h) | 42.9° 07:45 | 8.01 | 100% | 98.9° |
| 2033-09-09 Fri | 13 | — | unknown | 04:05–05:25 (marginal, 1.33 h) | 42.9° 07:40 | 8.07 | 99% | 85.1° |
| 2033-09-10 Sat | 10 | — | unknown | 04:10–05:25 (marginal, 1.25 h) | 42.9° 07:35 | 8.12 | 95% | 71.3° |
| 2033-09-11 Sun | 8 | — | unknown | 04:15–05:25 (marginal, 1.17 h) | 42.9° 07:30 | 8.18 | 88% | 57.9° |
| 2033-09-12 Mon | 7 | — | unknown | 04:15–05:25 (marginal, 1.17 h) | 42.9° 07:30 | 8.23 | 80% | 45.3° |
| 2033-09-13 Tue | 8 | — | unknown | 04:10–05:30 (marginal, 1.33 h) | 42.9° 07:25 | 8.28 | 70% | 34.2° |
| 2033-09-14 Wed | 11 | — | unknown | 03:50–05:30 (marginal, 1.67 h) | 42.9° 07:20 | 8.34 | 59% | 26.2° |
| 2033-09-15 Thu | 16 | — | unknown | 03:35–05:30 (marginal, 1.92 h) | 42.9° 07:15 | 8.39 | 48% | 23.8° |
| 2033-09-16 Fri | 21 | — | unknown | 04:30–05:30 (good, 1.0 h) | 42.9° 07:10 | 8.44 | 37% | 27.9° |
| 2033-09-17 Sat | 28 | — | unknown | 04:10–05:35 (good, 1.42 h) | 42.9° 07:10 | 8.49 | 28% | 36.1° |
| 2033-09-18 Sun | 34 | — | unknown | 04:00–05:35 (good, 1.58 h) | 42.9° 07:05 | 8.54 | 19% | 46.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2033-08-20&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.