← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-08-09 Sun | 0 | — | unknown | — | 50.1° 16:40 | 6.29 | 24% | 11.6° |
| 2043-08-10 Mon | 0 | — | unknown | — | 50.1° 16:35 | 6.35 | 33% | 23.1° |
| 2043-08-11 Tue | 0 | — | unknown | — | 50.1° 16:35 | 6.41 | 42% | 34.9° |
| 2043-08-12 Wed | 0 | — | unknown | — | 50.1° 16:30 | 6.46 | 51% | 46.6° |
| 2043-08-13 Thu | 0 | — | unknown | — | 50.1° 16:25 | 6.52 | 61% | 58.4° |
| 2043-08-14 Fri | 0 | — | unknown | — | 50.1° 16:20 | 6.58 | 70% | 70.2° |
| 2043-08-15 Sat | 0 | — | unknown | — | 50.1° 16:15 | 6.64 | 78% | 82.2° |
| 2043-08-16 Sun | 0 | — | unknown | — | 50.1° 16:15 | 6.69 | 86% | 94.4° |
| 2043-08-17 Mon | 0 | — | unknown | — | 50.1° 16:10 | 6.75 | 92% | 106.8° |
| 2043-08-18 Tue | 0 | — | unknown | — | 50.1° 16:05 | 6.81 | 97% | 119.5° |
| 2043-08-19 Wed | 0 | — | unknown | — | 50.1° 16:00 | 6.87 | 99% | 132.5° |
| 2043-08-20 Thu | 0 | — | unknown | — | 50.1° 15:55 | 6.92 | 100% | 145.7° |
| 2043-08-21 Fri | 0 | — | unknown | — | 50.1° 15:55 | 6.98 | 98% | 159.1° |
| 2043-08-22 Sat | 0 | — | unknown | — | 50.1° 15:50 | 7.04 | 94% | 171.7° |
| 2043-08-23 Sun | 0 | — | unknown | — | 50.1° 15:45 | 7.1 | 87% | 170.7° |
| 2043-08-24 Mon | 0 | — | unknown | — | 50.1° 15:40 | 7.15 | 78% | 157.7° |
| 2043-08-25 Tue | 0 | — | unknown | — | 50.1° 15:40 | 7.21 | 68% | 143.7° |
| 2043-08-26 Wed | 0 | — | unknown | — | 50.1° 15:35 | 7.27 | 57% | 129.7° |
| 2043-08-27 Thu | 0 | — | unknown | — | 50.1° 15:30 | 7.32 | 46% | 115.6° |
| 2043-08-28 Fri | 0 | — | unknown | — | 50.1° 15:25 | 7.38 | 34% | 101.5° |
| 2043-08-29 Sat | 0 | — | unknown | — | 50.1° 15:20 | 7.44 | 24% | 87.5° |
| 2043-08-30 Sun | 0 | — | unknown | — | 50.1° 15:20 | 7.49 | 15% | 73.7° |
| 2043-08-31 Mon | 0 | — | unknown | — | 50.1° 15:15 | 7.55 | 8% | 59.9° |
| 2043-09-01 Tue | 0 | — | unknown | — | 50.1° 15:10 | 7.6 | 3% | 46.4° |
| 2043-09-02 Wed | 0 | — | unknown | — | 50.1° 15:05 | 7.66 | 0% | 33.1° |
| 2043-09-03 Thu | 0 | — | unknown | — | 50.1° 15:00 | 7.72 | 0% | 20.3° |
| 2043-09-04 Fri | 0 | — | unknown | — | 50.1° 15:00 | 7.77 | 2% | 8.6° |
| 2043-09-05 Sat | 0 | — | unknown | — | 50.1° 14:55 | 7.83 | 6% | 7.9° |
| 2043-09-06 Sun | 0 | — | unknown | — | 50.1° 14:50 | 7.88 | 11% | 19.0° |
| 2043-09-07 Mon | 0 | — | unknown | — | 50.1° 14:45 | 7.94 | 18% | 30.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-08-09&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.