← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-27 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° |
| 2026-09-10 Thu | 0 | 0 | 0 | — | 50.2° 14:35 | 8.11 | 0% | 21.3° |
| 2026-09-11 Fri | 0 | 0 | 0 | — | 50.2° 14:30 | 8.16 | 1% | 10.0° |
| 2026-09-12 Sat | 0 | 0 | 0 | — | 50.2° 14:25 | 8.21 | 4% | 10.6° |
| 2026-09-13 Sun | 0 | 0 | 0 | — | 50.2° 14:20 | 8.27 | 9% | 21.6° |
| 2026-09-14 Mon | 0 | 0 | 0 | — | 50.2° 14:20 | 8.32 | 15% | 33.7° |
| 2026-09-15 Tue | 0 | 0 | 0 | — | 50.2° 14:15 | 8.37 | 23% | 45.8° |
| 2026-09-16 Wed | 0 | 0 | 0 | — | 50.2° 14:10 | 8.42 | 32% | 57.7° |
| 2026-09-17 Thu | 0 | 0 | 0 | — | 50.2° 14:05 | 8.48 | 41% | 69.5° |
| 2026-09-18 Fri | 0 | 0 | 0 | — | 50.2° 14:00 | 8.53 | 51% | 81.3° |
| 2026-09-19 Sat | 0 | 0 | 0 | — | 50.2° 14:00 | 8.58 | 60% | 93.0° |
| 2026-09-20 Sun | 0 | 0 | 0 | — | 50.2° 13:55 | 8.63 | 69% | 104.8° |
| 2026-09-21 Mon | 0 | 0 | 0 | — | 50.2° 13:50 | 8.68 | 78% | 116.7° |
| 2026-09-22 Tue | 0 | 0 | 0 | — | 50.2° 13:45 | 8.73 | 85% | 128.8° |
| 2026-09-23 Wed | 0 | 0 | 0 | — | 50.2° 13:40 | 8.78 | 92% | 141.2° |
| 2026-09-24 Thu | 0 | 0 | 0 | — | 50.2° 13:40 | 8.84 | 96% | 153.6° |
| 2026-09-25 Fri | 0 | 0 | 0 | — | 50.2° 13:35 | 8.89 | 99% | 165.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-27&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.