← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-02-21 Tue | 29 | — | unknown | 19:35–20:55 (good, 1.33 h) | 89.7° 15:00 | 9.98 | 22% | 28.9° |
| 2045-02-22 Wed | 23 | — | unknown | 19:40–20:40 (good, 1.0 h) | 89.8° 14:55 | 9.94 | 32% | 31.6° |
| 2045-02-23 Thu | 18 | — | unknown | 19:40–20:00 (good, 0.33 h) | 89.7° 14:50 | 9.9 | 42% | 38.5° |
| 2045-02-24 Fri | 15 | — | unknown | 19:40–21:25 (marginal, 1.75 h) | 89.6° 14:45 | 9.85 | 53% | 48.1° |
| 2045-02-25 Sat | 12 | — | unknown | 19:40–21:15 (marginal, 1.58 h) | 89.6° 14:45 | 9.81 | 64% | 59.2° |
| 2045-02-26 Sun | 11 | — | unknown | 19:45–21:10 (marginal, 1.42 h) | 89.8° 14:40 | 9.76 | 74% | 71.3° |
| 2045-02-27 Mon | 12 | — | unknown | 19:45–21:10 (marginal, 1.42 h) | 89.8° 14:35 | 9.72 | 84% | 83.9° |
| 2045-02-28 Tue | 14 | — | unknown | 19:45–19:50 (good, 0.08 h) | 89.7° 14:30 | 9.67 | 92% | 96.9° |
| 2045-03-01 Wed | 16 | — | unknown | 19:45–20:15 (good, 0.5 h) | 89.5° 14:25 | 9.63 | 97% | 109.9° |
| 2045-03-02 Thu | 17 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.7° 14:25 | 9.58 | 100% | 122.5° |
| 2045-03-03 Fri | 17 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.8° 14:20 | 9.54 | 99% | 134.1° |
| 2045-03-04 Sat | 19 | — | unknown | 19:50–20:15 (good, 0.42 h) | 89.8° 14:15 | 9.49 | 96% | 143.8° |
| 2045-03-05 Sun | 18 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.6° 14:10 | 9.44 | 91% | 149.9° |
| 2045-03-06 Mon | 16 | — | unknown | 19:50–20:15 (good, 0.42 h) | 89.5° 14:10 | 9.4 | 84% | 150.7° |
| 2045-03-07 Tue | 13 | — | unknown | 19:55–20:15 (good, 0.33 h) | 89.7° 14:05 | 9.35 | 75% | 146.3° |
| 2045-03-08 Wed | 12 | — | unknown | 19:55–20:10 (good, 0.25 h) | 89.8° 14:00 | 9.3 | 66% | 138.6° |
| 2045-03-09 Thu | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.8° 13:55 | 9.25 | 56% | 129.5° |
| 2045-03-10 Fri | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:50 | 9.2 | 46% | 119.7° |
| 2045-03-11 Sat | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.6° 13:50 | 9.16 | 37% | 109.5° |
| 2045-03-12 Sun | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.8° 13:45 | 9.11 | 28% | 99.3° |
| 2045-03-13 Mon | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.8° 13:40 | 9.06 | 20% | 89.0° |
| 2045-03-14 Tue | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:35 | 9.01 | 13% | 78.6° |
| 2045-03-15 Wed | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:30 | 8.96 | 7% | 68.3° |
| 2045-03-16 Thu | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.7° 13:30 | 8.91 | 3% | 58.2° |
| 2045-03-17 Fri | 1 | — | unknown | — | 89.8° 13:25 | 8.86 | 1% | 48.4° |
| 2045-03-18 Sat | 1 | — | unknown | — | 89.8° 13:20 | 8.8 | 0% | 39.6° |
| 2045-03-19 Sun | 1 | — | unknown | — | 89.6° 13:15 | 8.75 | 2% | 32.6° |
| 2045-03-20 Mon | 1 | — | unknown | — | 89.5° 13:15 | 8.7 | 5% | 29.1° |
| 2045-03-21 Tue | 1 | — | unknown | — | 89.7° 13:10 | 8.65 | 11% | 30.6° |
| 2045-03-22 Wed | 0 | — | unknown | — | 89.8° 13:05 | 8.6 | 18% | 36.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-02-21&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.