← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-10-15 Mon | 0 | — | unknown | — | 50.1° 12:15 | 9.85 | 78% | 141.4° |
| 2040-10-16 Tue | 0 | — | unknown | — | 50.1° 12:10 | 9.89 | 87% | 155.7° |
| 2040-10-17 Wed | 0 | — | unknown | — | 50.1° 12:05 | 9.93 | 93% | 169.8° |
| 2040-10-18 Thu | 0 | — | unknown | — | 50.1° 12:00 | 9.98 | 98% | 176.0° |
| 2040-10-19 Fri | 0 | — | unknown | — | 50.1° 11:55 | 10.02 | 100% | 162.2° |
| 2040-10-20 Sat | 0 | — | unknown | — | 50.1° 11:50 | 10.06 | 99% | 148.7° |
| 2040-10-21 Sun | 0 | — | unknown | — | 50.1° 11:45 | 10.1 | 97% | 135.4° |
| 2040-10-22 Mon | 0 | — | unknown | — | 50.1° 11:45 | 10.14 | 92% | 122.4° |
| 2040-10-23 Tue | 0 | — | unknown | — | 50.1° 11:40 | 10.18 | 86% | 109.8° |
| 2040-10-24 Wed | 0 | — | unknown | — | 50.1° 11:35 | 10.22 | 78% | 97.5° |
| 2040-10-25 Thu | 0 | — | unknown | — | 50.1° 11:30 | 10.26 | 69% | 85.4° |
| 2040-10-26 Fri | 0 | — | unknown | — | 50.1° 11:25 | 10.3 | 60% | 73.4° |
| 2040-10-27 Sat | 0 | — | unknown | — | 50.1° 10:25 | 10.34 | 51% | 61.6° |
| 2040-10-28 Sun | 0 | — | unknown | — | 50.1° 10:20 | 10.38 | 42% | 49.8° |
| 2040-10-29 Mon | 0 | — | unknown | — | 50.1° 10:15 | 10.41 | 32% | 37.9° |
| 2040-10-30 Tue | 0 | — | unknown | — | 50.1° 10:10 | 10.45 | 24% | 25.8° |
| 2040-10-31 Wed | 0 | — | unknown | — | 50.1° 10:05 | 10.49 | 16% | 13.5° |
| 2040-11-01 Thu | 0 | — | unknown | — | 50.1° 10:05 | 10.52 | 9% | 1.1° |
| 2040-11-02 Fri | 0 | — | unknown | — | 50.1° 10:00 | 10.56 | 4% | 12.2° |
| 2040-11-03 Sat | 1 | — | unknown | — | 50.1° 09:55 | 10.59 | 1% | 25.4° |
| 2040-11-04 Sun | 1 | — | unknown | — | 50.1° 09:50 | 10.63 | 0% | 39.0° |
| 2040-11-05 Mon | 1 | — | unknown | — | 50.1° 09:50 | 10.66 | 2% | 52.9° |
| 2040-11-06 Tue | 1 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 50.1° 09:45 | 10.7 | 6% | 67.0° |
| 2040-11-07 Wed | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:40 | 10.73 | 12% | 81.2° |
| 2040-11-08 Thu | 3 | — | unknown | 05:50–06:05 (marginal, 0.25 h) | 50.1° 09:35 | 10.76 | 21% | 95.5° |
| 2040-11-09 Fri | 4 | — | unknown | 05:15–05:30 (marginal, 0.25 h) | 50.1° 09:30 | 10.8 | 31% | 109.8° |
| 2040-11-10 Sat | 5 | — | unknown | 05:15–05:35 (marginal, 0.33 h) | 50.1° 09:30 | 10.83 | 42% | 124.0° |
| 2040-11-11 Sun | 6 | — | unknown | 05:10–06:05 (marginal, 0.92 h) | 50.1° 09:25 | 10.86 | 53% | 138.1° |
| 2040-11-12 Mon | 7 | — | unknown | 05:05–06:05 (marginal, 1.0 h) | 50.1° 09:20 | 10.89 | 64% | 152.1° |
| 2040-11-13 Tue | 9 | — | unknown | 05:30–05:35 (good, 0.08 h) | 50.1° 09:15 | 10.92 | 75% | 166.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-10-15&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.