← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-08-23 Mon | 1 | — | unknown | — | 42.9° 08:50 | 7.11 | 41% | 28.5° |
| 2038-08-24 Tue | 1 | — | unknown | — | 42.9° 08:45 | 7.16 | 31% | 27.3° |
| 2038-08-25 Wed | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 42.9° 08:40 | 7.22 | 22% | 31.1° |
| 2038-08-26 Thu | 4 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.28 | 14% | 38.7° |
| 2038-08-27 Fri | 5 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.33 | 8% | 48.6° |
| 2038-08-28 Sat | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 42.9° 08:30 | 7.39 | 3% | 59.9° |
| 2038-08-29 Sun | 8 | — | unknown | 04:40–05:45 (marginal, 1.08 h) | 42.9° 08:25 | 7.45 | 0% | 72.1° |
| 2038-08-30 Mon | 9 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:20 | 7.5 | 0% | 84.8° |
| 2038-08-31 Tue | 10 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.56 | 3% | 97.7° |
| 2038-09-01 Wed | 12 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:10 | 7.62 | 9% | 110.7° |
| 2038-09-02 Thu | 14 | — | unknown | 04:55–05:15 (good, 0.33 h) | 42.9° 08:10 | 7.67 | 17% | 123.2° |
| 2038-09-03 Fri | 15 | — | unknown | 04:50–05:15 (good, 0.42 h) | 42.9° 08:05 | 7.73 | 26% | 134.9° |
| 2038-09-04 Sat | 17 | — | unknown | 04:45–05:15 (good, 0.5 h) | 42.9° 08:00 | 7.78 | 37% | 144.9° |
| 2038-09-05 Sun | 19 | — | unknown | 04:40–05:15 (good, 0.58 h) | 42.9° 07:55 | 7.84 | 48% | 151.4° |
| 2038-09-06 Mon | 21 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:55 | 7.89 | 60% | 152.3° |
| 2038-09-07 Tue | 23 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:50 | 7.95 | 70% | 147.4° |
| 2038-09-08 Wed | 24 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:45 | 8.0 | 79% | 139.0° |
| 2038-09-09 Thu | 26 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:40 | 8.06 | 87% | 128.9° |
| 2038-09-10 Fri | 27 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:35 | 8.11 | 93% | 118.1° |
| 2038-09-11 Sat | 23 | — | unknown | 04:35–05:25 (good, 0.83 h) | 42.9° 07:35 | 8.16 | 97% | 107.1° |
| 2038-09-12 Sun | 19 | — | unknown | 04:40–05:25 (good, 0.75 h) | 42.9° 07:30 | 8.22 | 100% | 96.0° |
| 2038-09-13 Mon | 17 | — | unknown | 05:20–05:30 (good, 0.17 h) | 42.9° 07:25 | 8.27 | 100% | 85.1° |
| 2038-09-14 Tue | 14 | — | unknown | 03:50–05:30 (marginal, 1.67 h) | 42.9° 07:20 | 8.32 | 98% | 74.3° |
| 2038-09-15 Wed | 11 | — | unknown | 03:55–05:30 (marginal, 1.58 h) | 42.9° 07:15 | 8.38 | 94% | 63.9° |
| 2038-09-16 Thu | 9 | — | unknown | 04:00–05:30 (marginal, 1.5 h) | 42.9° 07:15 | 8.43 | 89% | 53.9° |
| 2038-09-17 Fri | 9 | — | unknown | 04:05–05:35 (marginal, 1.5 h) | 42.9° 07:10 | 8.48 | 83% | 44.5° |
| 2038-09-18 Sat | 9 | — | unknown | 03:55–05:35 (marginal, 1.67 h) | 42.9° 07:05 | 8.53 | 75% | 36.2° |
| 2038-09-19 Sun | 11 | — | unknown | 03:45–05:35 (marginal, 1.83 h) | 42.9° 07:00 | 8.59 | 67% | 30.0° |
| 2038-09-20 Mon | 14 | — | unknown | 03:25–05:35 (marginal, 2.17 h) | 42.9° 07:00 | 8.64 | 57% | 27.4° |
| 2038-09-21 Tue | 20 | — | unknown | 03:10–05:35 (marginal, 2.42 h) | 42.9° 06:55 | 8.69 | 48% | 29.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-08-23&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.