← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-08-20 Thu | 1 | — | unknown | — | 42.9° 09:00 | 6.92 | 100% | 107.4° |
| 2043-08-21 Fri | 1 | — | unknown | — | 42.9° 08:55 | 6.98 | 98% | 96.2° |
| 2043-08-22 Sat | 1 | — | unknown | — | 42.9° 08:55 | 7.04 | 94% | 84.7° |
| 2043-08-23 Sun | 1 | — | unknown | — | 42.9° 08:50 | 7.1 | 87% | 73.2° |
| 2043-08-24 Mon | 1 | — | unknown | — | 42.9° 08:45 | 7.15 | 78% | 61.9° |
| 2043-08-25 Tue | 1 | — | unknown | — | 42.9° 08:40 | 7.21 | 68% | 51.4° |
| 2043-08-26 Wed | 2 | — | unknown | — | 42.9° 08:35 | 7.27 | 57% | 42.3° |
| 2043-08-27 Thu | 2 | — | unknown | 04:55–05:05 (marginal, 0.17 h) | 42.9° 08:35 | 7.32 | 46% | 36.0° |
| 2043-08-28 Fri | 3 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.38 | 34% | 33.9° |
| 2043-08-29 Sat | 6 | — | unknown | 04:40–05:10 (marginal, 0.5 h) | 42.9° 08:25 | 7.44 | 24% | 36.8° |
| 2043-08-30 Sun | 7 | — | unknown | 04:35–05:10 (marginal, 0.58 h) | 42.9° 08:20 | 7.49 | 15% | 43.6° |
| 2043-08-31 Mon | 9 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:15 | 7.55 | 8% | 52.6° |
| 2043-09-01 Tue | 11 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.6 | 3% | 62.8° |
| 2043-09-02 Wed | 14 | — | unknown | 04:55–05:15 (good, 0.33 h) | 42.9° 08:10 | 7.66 | 0% | 73.6° |
| 2043-09-03 Thu | 15 | — | unknown | 04:50–05:15 (good, 0.42 h) | 42.9° 08:05 | 7.72 | 0% | 84.4° |
| 2043-09-04 Fri | 17 | — | unknown | 04:45–05:15 (good, 0.5 h) | 42.9° 08:00 | 7.77 | 2% | 95.1° |
| 2043-09-05 Sat | 18 | — | unknown | 04:45–05:15 (good, 0.5 h) | 42.9° 08:00 | 7.83 | 6% | 105.4° |
| 2043-09-06 Sun | 21 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:55 | 7.88 | 11% | 115.4° |
| 2043-09-07 Mon | 22 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:50 | 7.94 | 18% | 124.6° |
| 2043-09-08 Tue | 24 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:45 | 7.99 | 26% | 132.9° |
| 2043-09-09 Wed | 25 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:40 | 8.05 | 35% | 139.8° |
| 2043-09-10 Thu | 27 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:40 | 8.1 | 44% | 144.5° |
| 2043-09-11 Fri | 29 | — | unknown | 04:20–05:25 (good, 1.08 h) | 42.9° 07:35 | 8.15 | 54% | 146.1° |
| 2043-09-12 Sat | 30 | — | unknown | 04:15–05:25 (good, 1.17 h) | 42.9° 07:30 | 8.21 | 63% | 144.0° |
| 2043-09-13 Sun | 32 | — | unknown | 04:10–05:25 (good, 1.25 h) | 42.9° 07:25 | 8.26 | 72% | 138.8° |
| 2043-09-14 Mon | 34 | — | unknown | 04:10–05:30 (good, 1.33 h) | 42.9° 07:20 | 8.31 | 81% | 131.2° |
| 2043-09-15 Tue | 35 | — | unknown | 04:05–05:30 (good, 1.42 h) | 42.9° 07:20 | 8.37 | 88% | 121.9° |
| 2043-09-16 Wed | 35 | — | unknown | 04:15–05:30 (good, 1.25 h) | 42.9° 07:15 | 8.42 | 94% | 111.6° |
| 2043-09-17 Thu | 27 | — | unknown | 04:20–05:30 (good, 1.17 h) | 42.9° 07:10 | 8.47 | 98% | 100.5° |
| 2043-09-18 Fri | 22 | — | unknown | 04:50–05:35 (good, 0.75 h) | 42.9° 07:05 | 8.52 | 100% | 88.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-08-20&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.