← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-05-30 Sat | 0 | 0 | 0 | — | 72.5° 12:35 | 4.87 | 100% | 174.9° |
| 2026-05-31 Sun | 0 | 0 | 0 | — | 72.5° 12:35 | 4.83 | 100% | 163.2° |
| 2026-06-01 Mon | 0 | 0 | 0 | — | 72.5° 12:30 | 4.79 | 98% | 151.3° |
| 2026-06-02 Tue | 0 | 0 | 0 | — | 72.5° 12:25 | 4.76 | 94% | 139.5° |
| 2026-06-03 Wed | 0 | 0 | 0 | — | 72.5° 12:20 | 4.73 | 89% | 127.6° |
| 2026-06-04 Thu | 0 | 0 | 0 | — | 72.5° 12:20 | 4.69 | 82% | 115.6° |
| 2026-06-05 Fri | 0 | 0 | 0 | — | 72.5° 12:15 | 4.66 | 74% | 103.4° |
| 2026-06-06 Sat | 0 | 0 | 0 | — | 72.5° 12:10 | 4.63 | 65% | 91.0° |
| 2026-06-07 Sun | 0 | 0 | 0 | — | 72.5° 12:05 | 4.61 | 55% | 78.4° |
| 2026-06-08 Mon | 0 | 0 | 0 | — | 72.5° 12:00 | 4.58 | 45% | 65.4° |
| 2026-06-09 Tue | 0 | 0 | 0 | — | 72.5° 11:55 | 4.56 | 34% | 51.9° |
| 2026-06-10 Wed | 0 | 0 | 0 | — | 72.5° 11:50 | 4.53 | 24% | 38.1° |
| 2026-06-11 Thu | 0 | 0 | 0 | — | 72.5° 11:45 | 4.51 | 15% | 23.7° |
| 2026-06-12 Fri | 0 | 0 | 0 | — | 72.5° 11:40 | 4.49 | 7% | 9.0° |
| 2026-06-13 Sat | 0 | 0 | 0 | — | 72.5° 11:40 | 4.48 | 2% | 6.1° |
| 2026-06-14 Sun | 0 | 0 | 0 | — | 72.5° 11:35 | 4.46 | 0% | 21.3° |
| 2026-06-15 Mon | 0 | 0 | 0 | — | 72.5° 11:30 | 4.45 | 1% | 36.6° |
| 2026-06-16 Tue | 0 | 0 | 0 | — | 72.5° 11:25 | 4.44 | 5% | 51.6° |
| 2026-06-17 Wed | 0 | 0 | 0 | — | 72.5° 11:25 | 4.43 | 12% | 66.4° |
| 2026-06-18 Thu | 0 | 0 | 0 | — | 72.5° 11:20 | 4.43 | 20% | 80.8° |
| 2026-06-19 Fri | 0 | 0 | 0 | — | 72.5° 11:15 | 4.42 | 30% | 94.7° |
| 2026-06-20 Sat | 0 | 0 | 0 | — | 72.5° 11:10 | 4.42 | 40% | 108.1° |
| 2026-06-21 Sun | 0 | 0 | 0 | — | 72.5° 11:05 | 4.42 | 50% | 121.1° |
| 2026-06-22 Mon | 0 | 0 | 0 | — | 72.5° 11:05 | 4.42 | 60% | 133.7° |
| 2026-06-23 Tue | 0 | 0 | 0 | — | 72.5° 11:00 | 4.43 | 70% | 146.1° |
| 2026-06-24 Wed | 0 | 0 | 0 | — | 72.5° 10:55 | 4.43 | 78% | 158.2° |
| 2026-06-25 Thu | 0 | 0 | 0 | — | 72.5° 10:50 | 4.44 | 86% | 170.2° |
| 2026-06-26 Fri | 0 | 0 | 0 | — | 72.5° 10:45 | 4.45 | 92% | 177.7° |
| 2026-06-27 Sat | 0 | 0 | 0 | — | 72.5° 10:45 | 4.47 | 96% | 166.1° |
| 2026-06-28 Sun | 0 | 100 | 0 | — | 72.5° 10:40 | 4.48 | 99% | 154.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-05-30&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.