← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-08-18 Sun | 0 | — | unknown | — | 42.9° 09:10 | 6.81 | 7% | 41.4° |
| 2047-08-19 Mon | 0 | — | unknown | — | 42.9° 09:05 | 6.87 | 3% | 50.7° |
| 2047-08-20 Tue | 1 | — | unknown | — | 42.9° 09:00 | 6.93 | 0% | 61.5° |
| 2047-08-21 Wed | 1 | — | unknown | — | 42.9° 08:55 | 6.98 | 0% | 73.2° |
| 2047-08-22 Thu | 1 | — | unknown | — | 42.9° 08:55 | 7.04 | 3% | 85.3° |
| 2047-08-23 Fri | 1 | — | unknown | — | 42.9° 08:50 | 7.1 | 9% | 97.7° |
| 2047-08-24 Sat | 2 | — | unknown | 05:30–05:40 (marginal, 0.17 h) | 42.9° 08:45 | 7.15 | 16% | 110.0° |
| 2047-08-25 Sun | 3 | — | unknown | 05:25–05:40 (marginal, 0.25 h) | 42.9° 08:40 | 7.21 | 26% | 121.9° |
| 2047-08-26 Mon | 4 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.27 | 36% | 132.9° |
| 2047-08-27 Tue | 5 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.33 | 48% | 142.1° |
| 2047-08-28 Wed | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 42.9° 08:30 | 7.38 | 59% | 148.2° |
| 2047-08-29 Thu | 8 | — | unknown | 04:40–05:45 (marginal, 1.08 h) | 42.9° 08:25 | 7.44 | 70% | 149.3° |
| 2047-08-30 Fri | 9 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:20 | 7.49 | 80% | 145.1° |
| 2047-08-31 Sat | 10 | — | unknown | 05:05–05:10 (good, 0.08 h) | 42.9° 08:15 | 7.55 | 88% | 137.4° |
| 2047-09-01 Sun | 11 | — | unknown | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.61 | 94% | 127.8° |
| 2047-09-02 Mon | 11 | — | unknown | 05:05–05:15 (good, 0.17 h) | 42.9° 08:10 | 7.66 | 98% | 117.4° |
| 2047-09-03 Tue | 11 | — | unknown | 05:10–05:15 (good, 0.08 h) | 42.9° 08:05 | 7.72 | 100% | 106.6° |
| 2047-09-04 Wed | 10 | — | unknown | 04:15–05:15 (marginal, 1.0 h) | 42.9° 08:00 | 7.77 | 100% | 95.8° |
| 2047-09-05 Thu | 8 | — | unknown | 04:20–05:15 (marginal, 0.92 h) | 42.9° 08:00 | 7.83 | 97% | 85.1° |
| 2047-09-06 Fri | 8 | — | unknown | 04:25–05:20 (marginal, 0.92 h) | 42.9° 07:55 | 7.88 | 93% | 74.7° |
| 2047-09-07 Sat | 7 | — | unknown | 04:30–05:20 (marginal, 0.83 h) | 42.9° 07:50 | 7.94 | 88% | 64.5° |
| 2047-09-08 Sun | 6 | — | unknown | 04:30–05:20 (marginal, 0.83 h) | 42.9° 07:45 | 7.99 | 81% | 54.9° |
| 2047-09-09 Mon | 7 | — | unknown | 04:25–05:20 (marginal, 0.92 h) | 42.9° 07:40 | 8.05 | 73% | 46.0° |
| 2047-09-10 Tue | 8 | — | unknown | 04:15–05:25 (marginal, 1.17 h) | 42.9° 07:40 | 8.1 | 64% | 38.3° |
| 2047-09-11 Wed | 10 | — | unknown | 04:00–05:25 (marginal, 1.42 h) | 42.9° 07:35 | 8.16 | 55% | 32.6° |
| 2047-09-12 Thu | 14 | — | unknown | 03:50–05:25 (marginal, 1.58 h) | 42.9° 07:30 | 8.21 | 46% | 30.3° |
| 2047-09-13 Fri | 19 | — | unknown | 04:40–05:30 (good, 0.83 h) | 42.9° 07:25 | 8.26 | 36% | 32.3° |
| 2047-09-14 Sat | 25 | — | unknown | 04:25–05:30 (good, 1.08 h) | 42.9° 07:20 | 8.32 | 27% | 38.1° |
| 2047-09-15 Sun | 30 | — | unknown | 04:10–05:30 (good, 1.33 h) | 42.9° 07:20 | 8.37 | 18% | 46.7° |
| 2047-09-16 Mon | 34 | — | unknown | 04:00–05:30 (good, 1.5 h) | 42.9° 07:15 | 8.42 | 10% | 56.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-08-18&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.