← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-04-20 Sun | 99 | 83 | 82 | 02:55–04:50 (good, 1.92 h) | 87.1° 06:00 | 6.99 | 52% | 67.0° |
| 2025-04-21 Mon | 100 | 60 | 60 | 02:00–04:50 (good, 2.83 h) | 87.1° 05:55 | 6.93 | 41% | 68.6° |
| 2025-04-22 Tue | 100 | 54 | 54 | 04:00–04:50 (good, 0.83 h) | 87.1° 05:55 | 6.87 | 30% | 71.5° |
| 2025-04-23 Wed | 100 | 54 | 54 | 02:05–04:45 (good, 2.67 h) | 87.1° 05:50 | 6.81 | 21% | 75.5° |
| 2025-04-24 Thu | 100 | 88 | 88 | 00:05–04:45 (good, 4.67 h) | 87.1° 05:45 | 6.76 | 12% | 80.5° |
| 2025-04-25 Fri | 100 | 100 | 100 | 23:50–04:40 (good, 4.83 h) | 87.1° 05:40 | 6.7 | 5% | 86.1° |
| 2025-04-26 Sat | 100 | 33 | 33 | 02:00–04:40 (marginal, 2.67 h) | 87.1° 05:35 | 6.64 | 1% | 92.1° |
| 2025-04-27 Sun | 100 | 0 | 0 | — | 87.1° 05:35 | 6.58 | 0% | 98.0° |
| 2025-04-28 Mon | 100 | 100 | 100 | 23:35–04:35 (good, 5.0 h) | 87.1° 05:30 | 6.52 | 2% | 103.5° |
| 2025-04-29 Tue | 100 | 100 | 100 | 23:30–04:35 (good, 5.08 h) | 87.1° 05:25 | 6.47 | 7% | 108.0° |
| 2025-04-30 Wed | 100 | 91 | 91 | 23:30–04:35 (good, 5.08 h) | 87.1° 05:20 | 6.41 | 14% | 111.2° |
| 2025-05-01 Thu | 100 | 20 | 20 | 03:00–04:30 (marginal, 1.5 h) | 87.1° 05:20 | 6.35 | 23% | 113.0° |
| 2025-05-02 Fri | 100 | 99 | 99 | 23:25–04:30 (good, 5.08 h) | 87.1° 05:15 | 6.29 | 33% | 113.4° |
| 2025-05-03 Sat | 100 | 100 | 100 | 23:25–04:25 (good, 5.0 h) | 87.1° 05:10 | 6.23 | 43% | 112.4° |
| 2025-05-04 Sun | 100 | 25 | 25 | 23:25–01:00 (marginal, 1.58 h) | 87.1° 05:05 | 6.18 | 54% | 110.2° |
| 2025-05-05 Mon | 100 | 80 | 80 | 23:35–02:00 (good, 2.42 h) | 87.1° 05:00 | 6.12 | 64% | 107.2° |
| 2025-05-06 Tue | 100 | 0 | 0 | — | 87.1° 05:00 | 6.06 | 73% | 103.4° |
| 2025-05-07 Wed | 100 | 81 | 81 | 23:25–04:00 (good, 4.58 h) | 87.1° 04:55 | 6.0 | 81% | 99.1° |
| 2025-05-08 Thu | 85 | 75 | 64 | 00:00–04:00 (good, 4.0 h) | 87.1° 04:50 | 5.95 | 88% | 94.6° |
| 2025-05-09 Fri | 81 | 0 | 0 | — | 87.1° 04:45 | 5.89 | 93% | 89.9° |
| 2025-05-10 Sat | 77 | 3 | 2 | — | 87.1° 04:40 | 5.84 | 97% | 85.2° |
| 2025-05-11 Sun | 74 | 0 | 0 | — | 87.1° 04:40 | 5.78 | 99% | 80.7° |
| 2025-05-12 Mon | 69 | 0 | 0 | — | 87.1° 04:35 | 5.73 | 100% | 76.5° |
| 2025-05-13 Tue | 68 | 0 | 0 | — | 87.1° 04:30 | 5.67 | 98% | 72.8° |
| 2025-05-14 Wed | 73 | 97 | 71 | 23:40–04:10 (good, 4.5 h) | 87.1° 04:25 | 5.62 | 95% | 69.8° |
| 2025-05-15 Thu | 86 | 0 | 0 | — | 87.1° 04:25 | 5.56 | 90% | 67.7° |
| 2025-05-16 Fri | 92 | 0 | 0 | — | 87.1° 04:20 | 5.51 | 84% | 66.6° |
| 2025-05-17 Sat | 97 | 21 | 21 | 00:00–01:00 (good, 1.0 h) | 87.1° 04:15 | 5.46 | 76% | 66.6° |
| 2025-05-18 Sun | 100 | 100 | 100 | 22:40–04:00 (good, 5.33 h) | 87.1° 04:10 | 5.41 | 66% | 67.9° |
| 2025-05-19 Mon | 100 | 94 | 94 | 22:40–04:00 (good, 5.33 h) | 87.1° 04:05 | 5.36 | 56% | 70.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-04-20&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.