← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-04-22 Mon | 0 | — | unknown | — | 89.8° 12:05 | 6.89 | 5% | 33.9° |
| 2047-04-23 Tue | 0 | — | unknown | — | 89.7° 12:00 | 6.83 | 2% | 29.3° |
| 2047-04-24 Wed | 0 | — | unknown | — | 89.6° 11:55 | 6.78 | 0% | 28.7° |
| 2047-04-25 Thu | 0 | — | unknown | — | 89.8° 11:50 | 6.72 | 1% | 32.3° |
| 2047-04-26 Fri | 0 | — | unknown | — | 89.8° 11:45 | 6.66 | 3% | 39.1° |
| 2047-04-27 Sat | 1 | — | unknown | — | 89.7° 11:40 | 6.6 | 7% | 47.6° |
| 2047-04-28 Sun | 1 | — | unknown | — | 89.5° 11:35 | 6.54 | 12% | 57.3° |
| 2047-04-29 Mon | 1 | — | unknown | — | 89.7° 11:35 | 6.48 | 19% | 67.6° |
| 2047-04-30 Tue | 1 | — | unknown | — | 89.8° 11:30 | 6.43 | 28% | 78.4° |
| 2047-05-01 Wed | 1 | — | unknown | — | 89.8° 11:25 | 6.37 | 37% | 89.6° |
| 2047-05-02 Thu | 1 | — | unknown | — | 89.6° 11:20 | 6.31 | 48% | 101.0° |
| 2047-05-03 Fri | 1 | — | unknown | — | 89.6° 11:20 | 6.25 | 58% | 112.6° |
| 2047-05-04 Sat | 1 | — | unknown | — | 89.7° 11:15 | 6.19 | 69% | 124.3° |
| 2047-05-05 Sun | 1 | — | unknown | — | 89.8° 11:10 | 6.14 | 79% | 135.4° |
| 2047-05-06 Mon | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.8° 11:05 | 6.08 | 88% | 145.1° |
| 2047-05-07 Tue | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.6° 11:00 | 6.02 | 95% | 151.0° |
| 2047-05-08 Wed | 2 | — | unknown | — | 89.6° 11:00 | 5.97 | 99% | 150.4° |
| 2047-05-09 Thu | 2 | — | unknown | — | 89.8° 10:55 | 5.91 | 100% | 143.4° |
| 2047-05-10 Fri | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.8° 10:50 | 5.85 | 98% | 133.0° |
| 2047-05-11 Sat | 3 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.7° 10:45 | 5.8 | 93% | 121.2° |
| 2047-05-12 Sun | 2 | — | unknown | 04:05–04:10 (marginal, 0.08 h) | 89.5° 10:40 | 5.74 | 86% | 108.9° |
| 2047-05-13 Mon | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.7° 10:40 | 5.69 | 78% | 96.7° |
| 2047-05-14 Tue | 3 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.8° 10:35 | 5.64 | 68% | 84.9° |
| 2047-05-15 Wed | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 89.8° 10:30 | 5.58 | 58% | 73.5° |
| 2047-05-16 Thu | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.6° 10:25 | 5.53 | 48% | 62.7° |
| 2047-05-17 Fri | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.5° 10:25 | 5.48 | 38% | 52.5° |
| 2047-05-18 Sat | 5 | — | unknown | 03:40–04:05 (marginal, 0.42 h) | 89.7° 10:20 | 5.42 | 29% | 43.3° |
| 2047-05-19 Sun | 5 | — | unknown | 03:40–04:00 (marginal, 0.33 h) | 89.8° 10:15 | 5.37 | 21% | 35.4° |
| 2047-05-20 Mon | 7 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.8° 10:10 | 5.32 | 14% | 30.0° |
| 2047-05-21 Tue | 8 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.6° 10:05 | 5.27 | 8% | 28.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-04-22&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.