← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-11 Tue | 0 | 0 | 0 | — | 50.2° 16:30 | 6.41 | 1% | 57.4° |
| 2026-08-12 Wed | 0 | 0 | 0 | — | 50.2° 16:25 | 6.47 | 0% | 43.1° |
| 2026-08-13 Thu | 0 | 0 | 0 | — | 50.2° 16:25 | 6.53 | 2% | 29.2° |
| 2026-08-14 Fri | 0 | 0 | 0 | — | 50.2° 16:20 | 6.58 | 6% | 16.3° |
| 2026-08-15 Sat | 0 | 0 | 0 | — | 50.2° 16:15 | 6.64 | 12% | 7.9° |
| 2026-08-16 Sun | 0 | 0 | 0 | — | 50.2° 16:10 | 6.7 | 20% | 14.6° |
| 2026-08-17 Mon | 0 | 0 | 0 | — | 50.2° 16:10 | 6.76 | 29% | 26.2° |
| 2026-08-18 Tue | 0 | 0 | 0 | — | 50.2° 16:05 | 6.81 | 39% | 38.1° |
| 2026-08-19 Wed | 0 | 0 | 0 | — | 50.2° 16:00 | 6.87 | 48% | 50.0° |
| 2026-08-20 Thu | 0 | 0 | 0 | — | 50.2° 15:55 | 6.93 | 58% | 61.8° |
| 2026-08-21 Fri | 0 | 0 | 0 | — | 50.2° 15:50 | 6.99 | 67% | 73.5° |
| 2026-08-22 Sat | 0 | 0 | 0 | — | 50.2° 15:50 | 7.04 | 76% | 85.2° |
| 2026-08-23 Sun | 0 | 0 | 0 | — | 50.2° 15:45 | 7.1 | 83% | 97.0° |
| 2026-08-24 Mon | 0 | 0 | 0 | — | 50.2° 15:40 | 7.16 | 90% | 108.9° |
| 2026-08-25 Tue | 0 | 0 | 0 | — | 50.2° 15:35 | 7.22 | 95% | 121.0° |
| 2026-08-26 Wed | 0 | 0 | 0 | — | 50.2° 15:30 | 7.27 | 98% | 133.2° |
| 2026-08-27 Thu | 0 | 0 | 0 | — | 50.2° 15:30 | 7.33 | 100% | 145.5° |
| 2026-08-28 Fri | 0 | 0 | 0 | — | 50.2° 15:25 | 7.39 | 99% | 157.8° |
| 2026-08-29 Sat | 0 | 0 | 0 | — | 50.2° 15:20 | 7.44 | 97% | 169.0° |
| 2026-08-30 Sun | 0 | 0 | 0 | — | 50.2° 15:15 | 7.5 | 92% | 170.3° |
| 2026-08-31 Mon | 0 | 0 | 0 | — | 50.2° 15:15 | 7.56 | 85% | 159.3° |
| 2026-09-01 Tue | 0 | 0 | 0 | — | 50.2° 15:10 | 7.61 | 76% | 146.3° |
| 2026-09-02 Wed | 0 | 0 | 0 | — | 50.2° 15:05 | 7.67 | 66% | 132.7° |
| 2026-09-03 Thu | 0 | 0 | 0 | — | 50.2° 15:00 | 7.72 | 55% | 118.9° |
| 2026-09-04 Fri | 0 | 0 | 0 | — | 50.2° 14:55 | 7.78 | 43% | 105.0° |
| 2026-09-05 Sat | 0 | 0 | 0 | — | 50.2° 14:55 | 7.83 | 32% | 90.9° |
| 2026-09-06 Sun | 0 | 0 | 0 | — | 50.2° 14:50 | 7.89 | 22% | 76.7° |
| 2026-09-07 Mon | 0 | 0 | 0 | — | 50.2° 14:45 | 7.94 | 13% | 62.5° |
| 2026-09-08 Tue | 0 | 0 | 0 | — | 50.2° 14:40 | 8.0 | 6% | 48.4° |
| 2026-09-09 Wed | 0 | 0 | 0 | — | 50.2° 14:35 | 8.05 | 2% | 34.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-11&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.