← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-03-19 Sat | 39 | — | unknown | 03:15–04:55 (good, 1.67 h) | 87.3° 09:30 | 8.78 | 24% | 67.7° |
| 2039-03-20 Sun | 43 | — | unknown | 03:10–04:55 (good, 1.75 h) | 87.3° 09:25 | 8.73 | 15% | 64.4° |
| 2039-03-21 Mon | 43 | — | unknown | 03:10–04:50 (good, 1.67 h) | 87.2° 09:25 | 8.68 | 8% | 62.5° |
| 2039-03-22 Tue | 44 | — | unknown | 03:05–04:50 (good, 1.75 h) | 87.3° 09:20 | 8.63 | 4% | 62.3° |
| 2039-03-23 Wed | 44 | — | unknown | 03:00–04:45 (good, 1.75 h) | 87.3° 09:15 | 8.57 | 1% | 63.5° |
| 2039-03-24 Thu | 46 | — | unknown | 02:55–04:45 (good, 1.83 h) | 87.3° 09:10 | 8.52 | 0% | 66.0° |
| 2039-03-25 Fri | 47 | — | unknown | 02:50–04:45 (good, 1.92 h) | 87.3° 09:05 | 8.47 | 2% | 69.7° |
| 2039-03-26 Sat | 47 | — | unknown | 02:50–05:40 (good, 1.83 h) | 87.3° 10:05 | 8.42 | 5% | 74.1° |
| 2039-03-27 Sun | 48 | — | unknown | 03:45–05:40 (good, 1.92 h) | 87.3° 10:00 | 8.36 | 10% | 79.1° |
| 2039-03-28 Mon | 48 | — | unknown | 03:40–05:35 (good, 1.92 h) | 87.3° 09:55 | 8.31 | 16% | 84.4° |
| 2039-03-29 Tue | 50 | — | unknown | 03:35–05:35 (good, 2.0 h) | 87.3° 09:50 | 8.25 | 23% | 89.9° |
| 2039-03-30 Wed | 51 | — | unknown | 03:30–05:35 (good, 2.08 h) | 87.2° 09:45 | 8.2 | 32% | 95.3° |
| 2039-03-31 Thu | 51 | — | unknown | 03:30–05:30 (good, 2.0 h) | 87.3° 09:45 | 8.15 | 41% | 100.7° |
| 2039-04-01 Fri | 52 | — | unknown | 03:25–05:30 (good, 2.08 h) | 87.3° 09:40 | 8.09 | 50% | 105.7° |
| 2039-04-02 Sat | 52 | — | unknown | 03:30–05:30 (good, 2.0 h) | 87.3° 09:35 | 8.04 | 60% | 110.1° |
| 2039-04-03 Sun | 51 | — | unknown | 03:25–05:25 (good, 2.0 h) | 87.3° 09:30 | 7.98 | 70% | 113.8° |
| 2039-04-04 Mon | 51 | — | unknown | 03:25–05:25 (good, 2.0 h) | 87.2° 09:30 | 7.93 | 79% | 116.5° |
| 2039-04-05 Tue | 45 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.3° 09:25 | 7.87 | 87% | 117.7° |
| 2039-04-06 Wed | 45 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.3° 09:20 | 7.81 | 93% | 117.2° |
| 2039-04-07 Thu | 44 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.3° 09:15 | 7.76 | 98% | 115.0° |
| 2039-04-08 Fri | 41 | — | unknown | 03:20–05:15 (good, 1.92 h) | 87.3° 09:10 | 7.7 | 100% | 111.1° |
| 2039-04-09 Sat | 39 | — | unknown | 03:20–05:15 (good, 1.92 h) | 87.3° 09:10 | 7.64 | 99% | 105.8° |
| 2039-04-10 Sun | 37 | — | unknown | 03:20–05:10 (good, 1.83 h) | 87.3° 09:05 | 7.59 | 95% | 99.6° |
| 2039-04-11 Mon | 36 | — | unknown | 03:15–05:10 (good, 1.92 h) | 87.3° 09:00 | 7.53 | 89% | 92.8° |
| 2039-04-12 Tue | 37 | — | unknown | 03:10–05:10 (good, 2.0 h) | 87.3° 08:55 | 7.47 | 80% | 86.0° |
| 2039-04-13 Wed | 39 | — | unknown | 03:00–05:05 (good, 2.08 h) | 87.3° 08:50 | 7.42 | 70% | 79.5° |
| 2039-04-14 Thu | 44 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.3° 08:50 | 7.36 | 59% | 73.7° |
| 2039-04-15 Fri | 52 | — | unknown | 02:30–05:00 (good, 2.5 h) | 87.3° 08:45 | 7.3 | 48% | 68.8° |
| 2039-04-16 Sat | 59 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.3° 08:40 | 7.24 | 37% | 65.2° |
| 2039-04-17 Sun | 65 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.3° 08:35 | 7.19 | 27% | 63.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-03-19&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.