← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-04-04 Wed | 56 | — | unknown | 03:10–05:25 (good, 2.25 h) | 87.2° 09:25 | 7.91 | 2% | 55.8° |
| 2046-04-05 Thu | 56 | — | unknown | 03:05–05:20 (good, 2.25 h) | 87.1° 09:25 | 7.85 | 0% | 58.4° |
| 2046-04-06 Fri | 57 | — | unknown | 03:05–05:20 (good, 2.25 h) | 87.2° 09:20 | 7.8 | 0% | 62.4° |
| 2046-04-07 Sat | 57 | — | unknown | 03:00–05:15 (good, 2.25 h) | 87.2° 09:15 | 7.74 | 2% | 67.6° |
| 2046-04-08 Sun | 58 | — | unknown | 02:55–05:15 (good, 2.33 h) | 87.2° 09:10 | 7.68 | 6% | 73.7° |
| 2046-04-09 Mon | 60 | — | unknown | 02:50–05:15 (good, 2.42 h) | 87.2° 09:05 | 7.63 | 11% | 80.5° |
| 2046-04-10 Tue | 59 | — | unknown | 02:50–05:10 (good, 2.33 h) | 87.2° 09:05 | 7.57 | 18% | 87.7° |
| 2046-04-11 Wed | 61 | — | unknown | 02:45–05:10 (good, 2.42 h) | 87.2° 09:00 | 7.51 | 27% | 95.1° |
| 2046-04-12 Thu | 63 | — | unknown | 02:40–05:10 (good, 2.5 h) | 87.2° 08:55 | 7.46 | 37% | 102.5° |
| 2046-04-13 Fri | 62 | — | unknown | 02:40–05:05 (good, 2.42 h) | 87.2° 08:50 | 7.4 | 48% | 109.6° |
| 2046-04-14 Sat | 63 | — | unknown | 02:40–05:05 (good, 2.42 h) | 87.2° 08:45 | 7.34 | 59% | 116.0° |
| 2046-04-15 Sun | 62 | — | unknown | 02:35–05:00 (good, 2.42 h) | 87.2° 08:45 | 7.28 | 70% | 121.1° |
| 2046-04-16 Mon | 62 | — | unknown | 02:35–05:00 (good, 2.42 h) | 87.2° 08:40 | 7.23 | 80% | 124.3° |
| 2046-04-17 Tue | 62 | — | unknown | 02:30–05:00 (good, 2.5 h) | 87.2° 08:35 | 7.17 | 88% | 125.2° |
| 2046-04-18 Wed | 57 | — | unknown | 02:30–04:55 (good, 2.42 h) | 87.2° 08:30 | 7.11 | 95% | 123.3° |
| 2046-04-19 Thu | 55 | — | unknown | 02:25–04:55 (good, 2.5 h) | 87.1° 08:30 | 7.05 | 99% | 119.0° |
| 2046-04-20 Fri | 51 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:25 | 6.99 | 100% | 112.9° |
| 2046-04-21 Sat | 49 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:20 | 6.94 | 98% | 105.6° |
| 2046-04-22 Sun | 46 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.2° 08:15 | 6.88 | 94% | 97.8° |
| 2046-04-23 Mon | 44 | — | unknown | 02:25–04:45 (good, 2.33 h) | 87.2° 08:10 | 6.82 | 87% | 89.8° |
| 2046-04-24 Tue | 45 | — | unknown | 02:15–04:45 (good, 2.5 h) | 87.2° 08:10 | 6.76 | 79% | 82.1° |
| 2046-04-25 Wed | 46 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 08:05 | 6.7 | 70% | 75.0° |
| 2046-04-26 Thu | 55 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.64 | 60% | 68.6° |
| 2046-04-27 Fri | 61 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.59 | 50% | 63.1° |
| 2046-04-28 Sat | 66 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.53 | 41% | 58.9° |
| 2046-04-29 Sun | 70 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.47 | 32% | 56.0° |
| 2046-04-30 Mon | 75 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.41 | 23% | 54.8° |
| 2046-05-01 Tue | 79 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.35 | 16% | 55.2° |
| 2046-05-02 Wed | 82 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.3 | 10% | 57.4° |
| 2046-05-03 Thu | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.1° 07:35 | 6.24 | 5% | 61.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-04-04&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.