← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-08-21 Wed | 1 | — | unknown | — | 42.9° 08:55 | 6.99 | 42% | 32.2° |
| 2030-08-22 Thu | 1 | — | unknown | — | 42.9° 08:50 | 7.05 | 33% | 28.2° |
| 2030-08-23 Fri | 1 | — | unknown | — | 42.9° 08:50 | 7.1 | 24% | 28.4° |
| 2030-08-24 Sat | 2 | — | unknown | — | 42.9° 08:45 | 7.16 | 16% | 33.0° |
| 2030-08-25 Sun | 3 | — | unknown | 05:30–05:40 (marginal, 0.17 h) | 42.9° 08:40 | 7.22 | 10% | 40.7° |
| 2030-08-26 Mon | 4 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.27 | 5% | 50.1° |
| 2030-08-27 Tue | 5 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.33 | 1% | 60.8° |
| 2030-08-28 Wed | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 42.9° 08:30 | 7.39 | 0% | 72.1° |
| 2030-08-29 Thu | 8 | — | unknown | 04:40–05:45 (marginal, 1.08 h) | 42.9° 08:25 | 7.44 | 1% | 83.9° |
| 2030-08-30 Fri | 9 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:20 | 7.5 | 5% | 96.0° |
| 2030-08-31 Sat | 10 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.56 | 11% | 108.2° |
| 2030-09-01 Sun | 12 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:10 | 7.61 | 18% | 120.3° |
| 2030-09-02 Mon | 14 | — | unknown | 04:55–05:15 (good, 0.33 h) | 42.9° 08:10 | 7.67 | 28% | 131.8° |
| 2030-09-03 Tue | 15 | — | unknown | 04:50–05:15 (good, 0.42 h) | 42.9° 08:05 | 7.72 | 39% | 142.1° |
| 2030-09-04 Wed | 17 | — | unknown | 04:45–05:15 (good, 0.5 h) | 42.9° 08:00 | 7.78 | 50% | 149.8° |
| 2030-09-05 Thu | 19 | — | unknown | 04:40–05:15 (good, 0.58 h) | 42.9° 07:55 | 7.83 | 62% | 152.4° |
| 2030-09-06 Fri | 22 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:55 | 7.89 | 72% | 148.7° |
| 2030-09-07 Sat | 23 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:50 | 7.94 | 82% | 140.6° |
| 2030-09-08 Sun | 24 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:45 | 8.0 | 90% | 130.2° |
| 2030-09-09 Mon | 25 | — | unknown | 04:35–05:25 (good, 0.83 h) | 42.9° 07:40 | 8.05 | 95% | 118.8° |
| 2030-09-10 Tue | 20 | — | unknown | 04:40–05:25 (good, 0.75 h) | 42.9° 07:35 | 8.11 | 99% | 107.0° |
| 2030-09-11 Wed | 17 | — | unknown | 04:50–05:25 (good, 0.58 h) | 42.9° 07:35 | 8.16 | 100% | 95.2° |
| 2030-09-12 Thu | 14 | — | unknown | 03:55–05:25 (marginal, 1.5 h) | 42.9° 07:30 | 8.21 | 99% | 83.6° |
| 2030-09-13 Fri | 11 | — | unknown | 04:00–05:30 (marginal, 1.5 h) | 42.9° 07:25 | 8.27 | 95% | 72.3° |
| 2030-09-14 Sat | 10 | — | unknown | 04:05–05:30 (marginal, 1.42 h) | 42.9° 07:20 | 8.32 | 90% | 61.5° |
| 2030-09-15 Sun | 9 | — | unknown | 04:05–05:30 (marginal, 1.42 h) | 42.9° 07:15 | 8.37 | 84% | 51.3° |
| 2030-09-16 Mon | 8 | — | unknown | 04:05–05:30 (marginal, 1.42 h) | 42.9° 07:15 | 8.43 | 76% | 42.0° |
| 2030-09-17 Tue | 10 | — | unknown | 03:50–05:35 (marginal, 1.75 h) | 42.9° 07:10 | 8.48 | 68% | 34.2° |
| 2030-09-18 Wed | 13 | — | unknown | 03:35–05:35 (marginal, 2.0 h) | 42.9° 07:05 | 8.53 | 58% | 28.9° |
| 2030-09-19 Thu | 18 | — | unknown | 03:20–05:35 (marginal, 2.25 h) | 42.9° 07:00 | 8.58 | 49% | 27.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-08-21&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.