← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-10-18 Mon | 0 | — | unknown | — | 50.1° 12:00 | 9.95 | 73% | 97.8° |
| 2038-10-19 Tue | 0 | — | unknown | — | 50.1° 12:00 | 10.0 | 64% | 85.6° |
| 2038-10-20 Wed | 0 | — | unknown | — | 50.1° 11:50 | 10.04 | 54% | 73.2° |
| 2038-10-21 Thu | 0 | — | unknown | — | 50.1° 11:50 | 10.08 | 44% | 60.4° |
| 2038-10-22 Fri | 0 | — | unknown | — | 50.1° 11:45 | 10.12 | 34% | 47.2° |
| 2038-10-23 Sat | 0 | — | unknown | — | 50.1° 11:40 | 10.16 | 24% | 33.6° |
| 2038-10-24 Sun | 0 | — | unknown | — | 50.1° 11:35 | 10.2 | 15% | 19.5° |
| 2038-10-25 Mon | 0 | — | unknown | — | 50.1° 11:35 | 10.24 | 8% | 5.0° |
| 2038-10-26 Tue | 0 | — | unknown | — | 50.1° 11:30 | 10.28 | 3% | 10.0° |
| 2038-10-27 Wed | 0 | — | unknown | — | 50.1° 11:25 | 10.32 | 0% | 25.1° |
| 2038-10-28 Thu | 0 | — | unknown | — | 50.1° 11:20 | 10.36 | 1% | 40.4° |
| 2038-10-29 Fri | 0 | — | unknown | — | 50.1° 11:15 | 10.39 | 5% | 55.6° |
| 2038-10-30 Sat | 0 | — | unknown | — | 50.1° 10:15 | 10.43 | 11% | 70.6° |
| 2038-10-31 Sun | 0 | — | unknown | — | 50.1° 10:10 | 10.47 | 20% | 85.2° |
| 2038-11-01 Mon | 0 | — | unknown | — | 50.1° 10:05 | 10.5 | 29% | 99.3° |
| 2038-11-02 Tue | 0 | — | unknown | — | 50.1° 10:00 | 10.54 | 40% | 113.0° |
| 2038-11-03 Wed | 1 | — | unknown | — | 50.1° 09:55 | 10.58 | 50% | 126.2° |
| 2038-11-04 Thu | 1 | — | unknown | — | 50.1° 09:55 | 10.61 | 60% | 139.0° |
| 2038-11-05 Fri | 1 | — | unknown | — | 50.1° 09:50 | 10.65 | 70% | 151.5° |
| 2038-11-06 Sat | 1 | — | unknown | — | 50.1° 09:45 | 10.68 | 79% | 163.8° |
| 2038-11-07 Sun | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:40 | 10.71 | 86% | 175.9° |
| 2038-11-08 Mon | 3 | — | unknown | 05:50–06:05 (marginal, 0.25 h) | 50.1° 09:40 | 10.75 | 92% | 172.1° |
| 2038-11-09 Tue | 4 | — | unknown | 05:45–06:05 (marginal, 0.33 h) | 50.1° 09:35 | 10.78 | 96% | 160.2° |
| 2038-11-10 Wed | 4 | — | unknown | 05:15–05:30 (marginal, 0.25 h) | 50.1° 09:30 | 10.81 | 99% | 148.4° |
| 2038-11-11 Thu | 5 | — | unknown | 05:10–05:35 (marginal, 0.42 h) | 50.1° 09:25 | 10.84 | 100% | 136.5° |
| 2038-11-12 Fri | 6 | — | unknown | 05:05–05:35 (marginal, 0.5 h) | 50.1° 09:20 | 10.87 | 99% | 124.7° |
| 2038-11-13 Sat | 6 | — | unknown | 05:05–05:35 (marginal, 0.5 h) | 50.1° 09:20 | 10.9 | 96% | 112.8° |
| 2038-11-14 Sun | 6 | — | unknown | 05:00–05:35 (marginal, 0.58 h) | 50.1° 09:15 | 10.93 | 92% | 100.8° |
| 2038-11-15 Mon | 5 | — | unknown | 05:00–05:35 (marginal, 0.58 h) | 50.1° 09:10 | 10.96 | 86% | 88.7° |
| 2038-11-16 Tue | 6 | — | unknown | 05:00–05:40 (marginal, 0.67 h) | 50.1° 09:05 | 10.99 | 79% | 76.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-10-18&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.