← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-03-15 Fri | 40 | — | unknown | 20:05–21:45 (good, 1.67 h) | 42.9° 18:25 | 8.98 | 79% | 133.7° |
| 2047-03-16 Sat | 39 | — | unknown | 20:05–21:40 (good, 1.58 h) | 42.9° 18:20 | 8.93 | 69% | 142.7° |
| 2047-03-17 Sun | 38 | — | unknown | 20:05–21:35 (good, 1.5 h) | 42.9° 18:20 | 8.88 | 58% | 148.0° |
| 2047-03-18 Mon | 36 | — | unknown | 20:05–21:35 (good, 1.5 h) | 42.9° 18:15 | 8.83 | 47% | 148.4° |
| 2047-03-19 Tue | 33 | — | unknown | 20:10–21:30 (good, 1.33 h) | 42.9° 18:10 | 8.78 | 37% | 144.0° |
| 2047-03-20 Wed | 32 | — | unknown | 20:10–21:25 (good, 1.25 h) | 42.9° 18:05 | 8.73 | 27% | 136.5° |
| 2047-03-21 Thu | 30 | — | unknown | 20:10–21:20 (good, 1.17 h) | 42.9° 18:00 | 8.67 | 18% | 127.4° |
| 2047-03-22 Fri | 29 | — | unknown | 20:10–21:15 (good, 1.08 h) | 42.9° 18:00 | 8.62 | 12% | 117.6° |
| 2047-03-23 Sat | 27 | — | unknown | 20:15–21:15 (good, 1.0 h) | 42.9° 17:55 | 8.57 | 6% | 107.4° |
| 2047-03-24 Sun | 25 | — | unknown | 20:15–21:10 (good, 0.92 h) | 42.9° 17:50 | 8.52 | 2% | 97.1° |
| 2047-03-25 Mon | 24 | — | unknown | 20:15–21:05 (good, 0.83 h) | 42.9° 17:45 | 8.46 | 0% | 86.9° |
| 2047-03-26 Tue | 23 | — | unknown | 20:15–21:00 (good, 0.75 h) | 42.9° 17:45 | 8.41 | 0% | 76.7° |
| 2047-03-27 Wed | 21 | — | unknown | 20:20–21:00 (good, 0.67 h) | 42.9° 17:40 | 8.36 | 2% | 66.8° |
| 2047-03-28 Thu | 18 | — | unknown | 20:20–20:50 (good, 0.5 h) | 42.9° 17:35 | 8.3 | 6% | 57.2° |
| 2047-03-29 Fri | 16 | — | unknown | 20:20–20:45 (good, 0.42 h) | 42.9° 17:30 | 8.25 | 10% | 48.2° |
| 2047-03-30 Sat | 13 | — | unknown | 20:20–20:35 (good, 0.25 h) | 42.9° 17:25 | 8.2 | 17% | 40.3° |
| 2047-03-31 Sun | 9 | — | unknown | 20:50–22:15 (marginal, 1.42 h) | 42.9° 18:25 | 8.14 | 25% | 34.1° |
| 2047-04-01 Mon | 7 | — | unknown | 21:25–22:10 (marginal, 0.75 h) | 42.9° 18:20 | 8.09 | 33% | 31.1° |
| 2047-04-02 Tue | 5 | — | unknown | 21:25–22:00 (marginal, 0.58 h) | 42.9° 18:15 | 8.03 | 43% | 32.2° |
| 2047-04-03 Wed | 4 | — | unknown | 21:25–21:50 (marginal, 0.42 h) | 42.9° 18:10 | 7.98 | 53% | 37.4° |
| 2047-04-04 Thu | 2 | — | unknown | 21:30–21:40 (marginal, 0.17 h) | 42.9° 18:05 | 7.92 | 63% | 45.4° |
| 2047-04-05 Fri | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 18:05 | 7.87 | 74% | 55.5° |
| 2047-04-06 Sat | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 18:00 | 7.81 | 83% | 66.8° |
| 2047-04-07 Sun | 2 | — | unknown | — | 42.9° 17:55 | 7.75 | 91% | 79.0° |
| 2047-04-08 Mon | 1 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.7 | 96% | 91.7° |
| 2047-04-09 Tue | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 42.9° 17:50 | 7.64 | 99% | 104.7° |
| 2047-04-10 Wed | 1 | — | unknown | — | 42.9° 17:45 | 7.58 | 99% | 117.4° |
| 2047-04-11 Thu | 1 | — | unknown | — | 42.9° 17:40 | 7.53 | 96% | 129.4° |
| 2047-04-12 Fri | 1 | — | unknown | — | 42.9° 17:35 | 7.47 | 91% | 139.7° |
| 2047-04-13 Sat | 1 | — | unknown | — | 42.9° 17:30 | 7.41 | 83% | 146.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-03-15&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.