← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-04-19 Fri | 63 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.2° 08:30 | 7.07 | 23% | 54.4° |
| 2047-04-20 Sat | 67 | — | unknown | 02:10–04:50 (good, 2.67 h) | 87.2° 08:25 | 7.01 | 16% | 53.5° |
| 2047-04-21 Sun | 70 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.95 | 10% | 54.5° |
| 2047-04-22 Mon | 71 | — | unknown | 02:00–04:50 (good, 2.83 h) | 87.2° 08:15 | 6.89 | 5% | 57.1° |
| 2047-04-23 Tue | 71 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.2° 08:15 | 6.83 | 2% | 61.2° |
| 2047-04-24 Wed | 73 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.2° 08:10 | 6.78 | 0% | 66.5° |
| 2047-04-25 Thu | 75 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.2° 08:05 | 6.72 | 1% | 72.5° |
| 2047-04-26 Fri | 75 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.66 | 3% | 79.2° |
| 2047-04-27 Sat | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.6 | 7% | 86.2° |
| 2047-04-28 Sun | 76 | — | unknown | 01:40–04:35 (good, 2.92 h) | 87.2° 07:55 | 6.54 | 12% | 93.4° |
| 2047-04-29 Mon | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.48 | 19% | 100.6° |
| 2047-04-30 Tue | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.43 | 28% | 107.5° |
| 2047-05-01 Wed | 79 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:40 | 6.37 | 37% | 114.0° |
| 2047-05-02 Thu | 80 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.31 | 48% | 119.7° |
| 2047-05-03 Fri | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:35 | 6.25 | 58% | 124.0° |
| 2047-05-04 Sat | 80 | — | unknown | 01:25–04:25 (good, 3.0 h) | 87.2° 07:30 | 6.19 | 69% | 126.4° |
| 2047-05-05 Sun | 81 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.2° 07:25 | 6.14 | 79% | 126.3° |
| 2047-05-06 Mon | 79 | — | unknown | 01:20–04:20 (good, 3.0 h) | 87.2° 07:20 | 6.08 | 88% | 123.5° |
| 2047-05-07 Tue | 72 | — | unknown | 01:15–04:20 (good, 3.08 h) | 87.2° 07:20 | 6.02 | 95% | 118.4° |
| 2047-05-08 Wed | 66 | — | unknown | 01:20–04:20 (good, 3.0 h) | 87.2° 07:15 | 5.97 | 99% | 111.3° |
| 2047-05-09 Thu | 60 | — | unknown | 01:20–04:15 (good, 2.92 h) | 87.2° 07:10 | 5.91 | 100% | 103.1° |
| 2047-05-10 Fri | 55 | — | unknown | 01:20–04:15 (good, 2.92 h) | 87.2° 07:05 | 5.85 | 98% | 94.3° |
| 2047-05-11 Sat | 51 | — | unknown | 01:20–04:15 (good, 2.92 h) | 87.2° 07:00 | 5.8 | 93% | 85.5° |
| 2047-05-12 Sun | 49 | — | unknown | 01:15–04:10 (good, 2.92 h) | 87.2° 07:00 | 5.74 | 86% | 77.1° |
| 2047-05-13 Mon | 52 | — | unknown | 01:05–04:10 (good, 3.08 h) | 87.2° 06:55 | 5.69 | 78% | 69.5° |
| 2047-05-14 Tue | 64 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.2° 06:50 | 5.64 | 68% | 63.0° |
| 2047-05-15 Wed | 71 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.2° 06:45 | 5.58 | 58% | 58.0° |
| 2047-05-16 Thu | 78 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.2° 06:45 | 5.53 | 48% | 54.7° |
| 2047-05-17 Fri | 85 | — | unknown | 00:25–04:05 (good, 3.67 h) | 87.2° 06:40 | 5.48 | 38% | 53.3° |
| 2047-05-18 Sat | 92 | — | unknown | 00:20–04:05 (good, 3.75 h) | 87.2° 06:35 | 5.42 | 29% | 53.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-04-19&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.