← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-02-18 Wed | 16 | — | unknown | 19:35–21:35 (marginal, 2.0 h) | 89.5° 15:15 | 10.13 | 74% | 63.2° |
| 2043-02-19 Thu | 16 | — | unknown | 19:35–21:35 (marginal, 2.0 h) | 89.7° 15:10 | 10.09 | 83% | 74.5° |
| 2043-02-20 Fri | 18 | — | unknown | 19:35–21:35 (marginal, 2.0 h) | 89.8° 15:05 | 10.05 | 90% | 85.9° |
| 2043-02-21 Sat | 21 | — | unknown | 19:35–20:15 (good, 0.67 h) | 89.8° 15:00 | 10.0 | 96% | 97.2° |
| 2043-02-22 Sun | 24 | — | unknown | 19:40–20:40 (good, 1.0 h) | 89.6° 14:55 | 9.96 | 99% | 108.3° |
| 2043-02-23 Mon | 28 | — | unknown | 19:40–20:50 (good, 1.17 h) | 89.6° 14:55 | 9.92 | 100% | 118.8° |
| 2043-02-24 Tue | 27 | — | unknown | 19:40–20:45 (good, 1.08 h) | 89.7° 14:50 | 9.88 | 99% | 128.6° |
| 2043-02-25 Wed | 30 | — | unknown | 19:40–20:45 (good, 1.08 h) | 89.8° 14:45 | 9.83 | 96% | 137.2° |
| 2043-02-26 Thu | 30 | — | unknown | 19:40–20:50 (good, 1.17 h) | 89.7° 14:40 | 9.79 | 91% | 144.0° |
| 2043-02-27 Fri | 28 | — | unknown | 19:45–20:45 (good, 1.0 h) | 89.6° 14:35 | 9.74 | 85% | 147.9° |
| 2043-02-28 Sat | 26 | — | unknown | 19:45–20:40 (good, 0.92 h) | 89.6° 14:35 | 9.7 | 78% | 148.0° |
| 2043-03-01 Sun | 25 | — | unknown | 19:45–20:40 (good, 0.92 h) | 89.8° 14:30 | 9.65 | 70% | 144.4° |
| 2043-03-02 Mon | 23 | — | unknown | 19:45–20:35 (good, 0.83 h) | 89.8° 14:25 | 9.61 | 60% | 138.0° |
| 2043-03-03 Tue | 22 | — | unknown | 19:50–20:30 (good, 0.67 h) | 89.7° 14:20 | 9.56 | 51% | 129.9° |
| 2043-03-04 Wed | 20 | — | unknown | 19:50–20:25 (good, 0.58 h) | 89.5° 14:20 | 9.51 | 41% | 120.6° |
| 2043-03-05 Thu | 18 | — | unknown | 19:50–20:25 (good, 0.58 h) | 89.7° 14:15 | 9.47 | 32% | 110.6° |
| 2043-03-06 Fri | 17 | — | unknown | 19:50–20:20 (good, 0.5 h) | 89.8° 14:10 | 9.42 | 23% | 99.9° |
| 2043-03-07 Sat | 14 | — | unknown | 19:55–20:15 (good, 0.33 h) | 89.8° 14:05 | 9.37 | 15% | 88.8° |
| 2043-03-08 Sun | 13 | — | unknown | 19:55–20:10 (good, 0.25 h) | 89.6° 14:00 | 9.33 | 8% | 77.3° |
| 2043-03-09 Mon | 11 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.6° 14:00 | 9.28 | 3% | 65.7° |
| 2043-03-10 Tue | 10 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.7° 13:55 | 9.23 | 0% | 54.3° |
| 2043-03-11 Wed | 7 | — | unknown | 19:25–20:30 (marginal, 1.08 h) | 89.8° 13:50 | 9.18 | 0% | 43.8° |
| 2043-03-12 Thu | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.7° 13:45 | 9.13 | 3% | 35.5° |
| 2043-03-13 Fri | 5 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.6° 13:40 | 9.08 | 9% | 31.6° |
| 2043-03-14 Sat | 4 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.6° 13:40 | 9.03 | 17% | 33.5° |
| 2043-03-15 Sun | 2 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.8° 13:35 | 8.98 | 27% | 40.3° |
| 2043-03-16 Mon | 2 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.8° 13:30 | 8.93 | 38% | 49.9° |
| 2043-03-17 Tue | 1 | — | unknown | — | 89.7° 13:25 | 8.88 | 49% | 60.6° |
| 2043-03-18 Wed | 1 | — | unknown | — | 89.5° 13:20 | 8.83 | 60% | 71.9° |
| 2043-03-19 Thu | 1 | — | unknown | — | 89.7° 13:20 | 8.78 | 70% | 83.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-02-18&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.