← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-06-27 Sat | 0 | 0 | 0 | — | 42.9° 12:35 | 4.47 | 96% | 145.2° |
| 2026-06-28 Sun | 0 | 0 | 0 | — | 42.9° 12:30 | 4.48 | 99% | 146.6° |
| 2026-06-29 Mon | 0 | 0 | 0 | — | 42.9° 12:30 | 4.5 | 100% | 144.4° |
| 2026-06-30 Tue | 0 | 0 | 0 | — | 42.9° 12:25 | 4.52 | 99% | 139.1° |
| 2026-07-01 Wed | 0 | 0 | 0 | — | 42.9° 12:20 | 4.54 | 96% | 131.7° |
| 2026-07-02 Thu | 0 | 0 | 0 | — | 42.9° 12:15 | 4.56 | 92% | 123.0° |
| 2026-07-03 Fri | 0 | 0 | 0 | — | 42.9° 12:10 | 4.58 | 86% | 113.4° |
| 2026-07-04 Sat | 0 | 0 | 0 | — | 42.9° 12:10 | 4.61 | 78% | 103.2° |
| 2026-07-05 Sun | 0 | 0 | 0 | — | 42.9° 12:00 | 4.64 | 70% | 92.6° |
| 2026-07-06 Mon | 0 | 0 | 0 | — | 42.9° 12:00 | 4.67 | 59% | 81.7° |
| 2026-07-07 Tue | 0 | 0 | 0 | — | 42.9° 11:50 | 4.7 | 49% | 70.7° |
| 2026-07-08 Wed | 0 | 0 | 0 | — | 42.9° 11:50 | 4.73 | 38% | 59.8° |
| 2026-07-09 Thu | 0 | 0 | 0 | — | 42.9° 11:45 | 4.76 | 27% | 49.5° |
| 2026-07-10 Fri | 0 | 0 | 0 | — | 42.9° 11:40 | 4.8 | 17% | 40.5° |
| 2026-07-11 Sat | 0 | 0 | 0 | — | 42.9° 11:35 | 4.84 | 9% | 34.6° |
| 2026-07-12 Sun | 0 | 0 | 0 | — | 42.9° 11:35 | 4.87 | 3% | 33.8° |
| 2026-07-13 Mon | 0 | 0 | 0 | — | 42.9° 11:30 | 4.91 | 0% | 38.6° |
| 2026-07-14 Tue | 0 | 0 | 0 | — | 42.9° 11:25 | 4.96 | 0% | 47.3° |
| 2026-07-15 Wed | 0 | 0 | 0 | — | 42.9° 11:20 | 5.0 | 3% | 57.8° |
| 2026-07-16 Thu | 0 | 0 | 0 | — | 42.9° 11:15 | 5.04 | 9% | 69.2° |
| 2026-07-17 Fri | 0 | 0 | 0 | — | 42.9° 11:15 | 5.08 | 16% | 80.6° |
| 2026-07-18 Sat | 0 | 0 | 0 | — | 42.9° 11:10 | 5.13 | 25% | 91.9° |
| 2026-07-19 Sun | 0 | 0 | 0 | — | 42.9° 11:05 | 5.18 | 35% | 102.8° |
| 2026-07-20 Mon | 0 | 0 | 0 | — | 42.9° 11:00 | 5.22 | 45% | 113.1° |
| 2026-07-21 Tue | 0 | 0 | 0 | — | 42.9° 10:55 | 5.27 | 55% | 122.7° |
| 2026-07-22 Wed | 0 | 0 | 0 | — | 42.9° 10:55 | 5.32 | 64% | 131.4° |
| 2026-07-23 Thu | 0 | 0 | 0 | — | 42.9° 10:50 | 5.37 | 73% | 138.8° |
| 2026-07-24 Fri | 0 | 0 | 0 | — | 42.9° 10:45 | 5.42 | 81% | 144.1° |
| 2026-07-25 Sat | 0 | 0 | 0 | — | 42.9° 10:40 | 5.47 | 88% | 146.5° |
| 2026-07-26 Sun | 0 | 0 | 0 | — | 42.9° 10:40 | 5.52 | 93% | 145.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-06-27&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.