← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-08-20 Mon | 0 | — | unknown | — | 50.1° 15:55 | 6.94 | 84% | 166.4° |
| 2046-08-21 Tue | 0 | — | unknown | — | 50.1° 15:50 | 7.0 | 76% | 156.4° |
| 2046-08-22 Wed | 0 | — | unknown | — | 50.1° 15:50 | 7.05 | 68% | 145.2° |
| 2046-08-23 Thu | 0 | — | unknown | — | 50.1° 15:45 | 7.11 | 58% | 133.5° |
| 2046-08-24 Fri | 0 | — | unknown | — | 50.1° 15:40 | 7.17 | 48% | 121.4° |
| 2046-08-25 Sat | 0 | — | unknown | — | 50.1° 15:35 | 7.23 | 38% | 109.0° |
| 2046-08-26 Sun | 0 | — | unknown | — | 50.1° 15:35 | 7.28 | 28% | 96.1° |
| 2046-08-27 Mon | 0 | — | unknown | — | 50.1° 15:30 | 7.34 | 19% | 82.8° |
| 2046-08-28 Tue | 0 | — | unknown | — | 50.1° 15:25 | 7.4 | 11% | 69.0° |
| 2046-08-29 Wed | 0 | — | unknown | — | 50.1° 15:20 | 7.45 | 5% | 54.9° |
| 2046-08-30 Thu | 0 | — | unknown | — | 50.1° 15:15 | 7.51 | 1% | 40.4° |
| 2046-08-31 Fri | 0 | — | unknown | — | 50.1° 15:15 | 7.56 | 0% | 26.1° |
| 2046-09-01 Sat | 0 | — | unknown | — | 50.1° 15:10 | 7.62 | 2% | 13.1° |
| 2046-09-02 Sun | 0 | — | unknown | — | 50.1° 15:05 | 7.68 | 7% | 11.0° |
| 2046-09-03 Mon | 0 | — | unknown | — | 50.1° 15:00 | 7.73 | 15% | 22.6° |
| 2046-09-04 Tue | 0 | — | unknown | — | 50.1° 14:55 | 7.79 | 24% | 36.3° |
| 2046-09-05 Wed | 0 | — | unknown | — | 50.1° 14:55 | 7.84 | 34% | 50.1° |
| 2046-09-06 Thu | 0 | — | unknown | — | 50.1° 14:50 | 7.9 | 45% | 63.6° |
| 2046-09-07 Fri | 0 | — | unknown | — | 50.1° 14:45 | 7.95 | 56% | 76.7° |
| 2046-09-08 Sat | 0 | — | unknown | — | 50.1° 14:40 | 8.01 | 66% | 89.6° |
| 2046-09-09 Sun | 0 | — | unknown | — | 50.1° 14:40 | 8.06 | 75% | 102.1° |
| 2046-09-10 Mon | 0 | — | unknown | — | 50.1° 14:35 | 8.11 | 83% | 114.4° |
| 2046-09-11 Tue | 0 | — | unknown | — | 50.1° 14:30 | 8.17 | 90% | 126.4° |
| 2046-09-12 Wed | 0 | — | unknown | — | 50.1° 14:25 | 8.22 | 95% | 138.2° |
| 2046-09-13 Thu | 0 | — | unknown | — | 50.1° 14:20 | 8.27 | 98% | 149.8° |
| 2046-09-14 Fri | 0 | — | unknown | — | 50.1° 14:20 | 8.33 | 100% | 160.7° |
| 2046-09-15 Sat | 0 | — | unknown | — | 50.1° 14:15 | 8.38 | 100% | 169.4° |
| 2046-09-16 Sun | 0 | — | unknown | — | 50.1° 14:10 | 8.43 | 97% | 168.6° |
| 2046-09-17 Mon | 0 | — | unknown | — | 50.1° 14:05 | 8.49 | 94% | 159.4° |
| 2046-09-18 Tue | 0 | — | unknown | — | 50.1° 14:00 | 8.54 | 88% | 148.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-08-20&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.