← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-06-25 Sun | 0 | — | unknown | — | 72.5° 10:50 | 4.45 | 13% | 77.5° |
| 2028-06-26 Mon | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 22% | 91.9° |
| 2028-06-27 Tue | 0 | — | unknown | — | 72.5° 10:40 | 4.47 | 32% | 106.3° |
| 2028-06-28 Wed | 0 | — | unknown | — | 72.5° 10:35 | 4.49 | 43% | 120.6° |
| 2028-06-29 Thu | 0 | — | unknown | — | 72.5° 10:35 | 4.51 | 55% | 134.7° |
| 2028-06-30 Fri | 0 | — | unknown | — | 72.5° 10:30 | 4.53 | 66% | 148.6° |
| 2028-07-01 Sat | 0 | — | unknown | — | 72.5° 10:25 | 4.55 | 76% | 162.3° |
| 2028-07-02 Sun | 0 | — | unknown | — | 72.5° 10:20 | 4.57 | 85% | 175.8° |
| 2028-07-03 Mon | 0 | — | unknown | — | 72.5° 10:20 | 4.6 | 92% | 170.9° |
| 2028-07-04 Tue | 0 | — | unknown | — | 72.5° 10:15 | 4.62 | 96% | 157.8° |
| 2028-07-05 Wed | 0 | — | unknown | — | 72.5° 10:10 | 4.65 | 99% | 144.9° |
| 2028-07-06 Thu | 0 | — | unknown | — | 72.5° 10:05 | 4.68 | 100% | 132.3° |
| 2028-07-07 Fri | 1 | — | unknown | — | 72.5° 10:00 | 4.71 | 99% | 119.8° |
| 2028-07-08 Sat | 1 | — | unknown | — | 72.5° 10:00 | 4.75 | 95% | 107.6° |
| 2028-07-09 Sun | 1 | — | unknown | — | 72.5° 09:55 | 4.78 | 90% | 95.5° |
| 2028-07-10 Mon | 1 | — | unknown | — | 72.5° 09:50 | 4.82 | 84% | 83.6° |
| 2028-07-11 Tue | 1 | — | unknown | — | 72.5° 09:45 | 4.86 | 77% | 71.7° |
| 2028-07-12 Wed | 1 | — | unknown | — | 72.5° 09:40 | 4.9 | 68% | 59.9° |
| 2028-07-13 Thu | 1 | — | unknown | — | 72.5° 09:40 | 4.94 | 59% | 48.0° |
| 2028-07-14 Fri | 1 | — | unknown | — | 72.5° 09:35 | 4.98 | 49% | 36.0° |
| 2028-07-15 Sat | 2 | — | unknown | 03:55–04:00 (marginal, 0.08 h) | 72.5° 09:30 | 5.02 | 40% | 23.7° |
| 2028-07-16 Sun | 3 | — | unknown | 04:40–04:50 (marginal, 0.17 h) | 72.5° 09:25 | 5.06 | 30% | 11.2° |
| 2028-07-17 Mon | 4 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:25 | 5.11 | 21% | 1.7° |
| 2028-07-18 Tue | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:20 | 5.15 | 13% | 15.0° |
| 2028-07-19 Wed | 8 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.2 | 6% | 28.7° |
| 2028-07-20 Thu | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.25 | 2% | 42.9° |
| 2028-07-21 Fri | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.3 | 0% | 57.4° |
| 2028-07-22 Sat | 13 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:05 | 5.35 | 1% | 72.2° |
| 2028-07-23 Sun | 15 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.4 | 5% | 87.1° |
| 2028-07-24 Mon | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.5° 08:55 | 5.45 | 11% | 101.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-06-25&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.