← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-02-22 Sat | 34 | — | unknown | 19:40–21:05 (good, 1.42 h) | 89.8° 14:55 | 9.95 | 10% | 38.2° |
| 2042-02-23 Sun | 29 | — | unknown | 19:40–20:50 (good, 1.17 h) | 89.6° 14:50 | 9.91 | 18% | 33.6° |
| 2042-02-24 Mon | 23 | — | unknown | 19:40–20:40 (good, 1.0 h) | 89.6° 14:50 | 9.86 | 28% | 34.4° |
| 2042-02-25 Tue | 18 | — | unknown | 19:40–20:25 (good, 0.75 h) | 89.7° 14:45 | 9.82 | 39% | 39.8° |
| 2042-02-26 Wed | 14 | — | unknown | 19:45–21:20 (marginal, 1.58 h) | 89.8° 14:40 | 9.78 | 50% | 48.0° |
| 2042-02-27 Thu | 12 | — | unknown | 19:45–21:10 (marginal, 1.42 h) | 89.7° 14:35 | 9.73 | 60% | 57.5° |
| 2042-02-28 Fri | 11 | — | unknown | 19:45–21:00 (marginal, 1.25 h) | 89.5° 14:30 | 9.69 | 70% | 67.7° |
| 2042-03-01 Sat | 10 | — | unknown | 19:45–21:00 (marginal, 1.25 h) | 89.6° 14:30 | 9.64 | 79% | 78.0° |
| 2042-03-02 Sun | 11 | — | unknown | 19:45–21:00 (marginal, 1.25 h) | 89.8° 14:25 | 9.6 | 86% | 88.3° |
| 2042-03-03 Mon | 12 | — | unknown | 19:15–21:00 (marginal, 1.75 h) | 89.8° 14:20 | 9.55 | 92% | 98.6° |
| 2042-03-04 Tue | 13 | — | unknown | 19:50–20:00 (good, 0.17 h) | 89.7° 14:15 | 9.5 | 97% | 108.5° |
| 2042-03-05 Wed | 14 | — | unknown | 19:50–20:05 (good, 0.25 h) | 89.5° 14:15 | 9.46 | 99% | 118.1° |
| 2042-03-06 Thu | 13 | — | unknown | 19:50–20:05 (good, 0.25 h) | 89.7° 14:10 | 9.41 | 100% | 127.2° |
| 2042-03-07 Fri | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.8° 14:05 | 9.36 | 99% | 135.3° |
| 2042-03-08 Sat | 12 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.8° 14:00 | 9.31 | 96% | 141.8° |
| 2042-03-09 Sun | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.6° 13:55 | 9.27 | 92% | 146.0° |
| 2042-03-10 Mon | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:55 | 9.22 | 86% | 146.7° |
| 2042-03-11 Tue | 7 | — | unknown | 19:25–20:30 (marginal, 1.08 h) | 89.7° 13:50 | 9.17 | 78% | 143.7° |
| 2042-03-12 Wed | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.8° 13:45 | 9.12 | 70% | 137.8° |
| 2042-03-13 Thu | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.7° 13:40 | 9.07 | 60% | 129.8° |
| 2042-03-14 Fri | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.5° 13:35 | 9.02 | 50% | 120.4° |
| 2042-03-15 Sat | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.6° 13:35 | 8.97 | 40% | 110.0° |
| 2042-03-16 Sun | 3 | — | unknown | 19:30–19:40 (marginal, 0.17 h) | 89.8° 13:30 | 8.92 | 30% | 98.8° |
| 2042-03-17 Mon | 2 | — | unknown | 19:30–19:35 (marginal, 0.08 h) | 89.8° 13:25 | 8.87 | 20% | 87.1° |
| 2042-03-18 Tue | 1 | — | unknown | — | 89.7° 13:20 | 8.82 | 11% | 75.1° |
| 2042-03-19 Wed | 1 | — | unknown | — | 89.5° 13:20 | 8.77 | 5% | 63.1° |
| 2042-03-20 Thu | 1 | — | unknown | — | 89.7° 13:15 | 8.72 | 1% | 51.6° |
| 2042-03-21 Fri | 1 | — | unknown | — | 89.8° 13:10 | 8.66 | 0% | 41.7° |
| 2042-03-22 Sat | 0 | — | unknown | — | 89.8° 13:05 | 8.61 | 2% | 34.9° |
| 2042-03-23 Sun | 0 | — | unknown | — | 89.6° 13:00 | 8.56 | 7% | 33.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-02-22&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.