← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-05-16 Fri | 81 | 0 | 0 | — | 50.2° 22:10 | 5.51 | 84% | 98.1° |
| 2025-05-17 Sat | 83 | 30 | 25 | 00:00–00:50 (good, 0.83 h) | 50.2° 22:10 | 5.46 | 76% | 110.6° |
| 2025-05-18 Sun | 81 | 100 | 81 | 22:40–01:55 (good, 3.25 h) | 50.2° 22:05 | 5.41 | 66% | 123.3° |
| 2025-05-19 Mon | 79 | 92 | 72 | 22:40–01:50 (good, 3.17 h) | 50.2° 22:00 | 5.36 | 56% | 136.3° |
| 2025-05-20 Tue | 77 | 43 | 33 | 22:40–00:00 (good, 1.33 h) | 50.2° 21:55 | 5.31 | 45% | 149.5° |
| 2025-05-21 Wed | 76 | 68 | 52 | 23:00–01:45 (good, 2.75 h) | 50.2° 21:55 | 5.26 | 34% | 162.9° |
| 2025-05-22 Thu | 73 | 96 | 70 | 22:45–01:35 (good, 2.83 h) | 50.2° 21:50 | 5.21 | 24% | 174.0° |
| 2025-05-23 Fri | 71 | 6 | 4 | — | 50.2° 21:45 | 5.16 | 15% | 166.1° |
| 2025-05-24 Sat | 69 | 0 | 0 | — | 50.2° 21:40 | 5.12 | 7% | 151.9° |
| 2025-05-25 Sun | 66 | 0 | 0 | — | 50.2° 21:35 | 5.07 | 2% | 137.0° |
| 2025-05-26 Mon | 65 | 79 | 51 | 22:50–01:00 (good, 2.17 h) | 50.2° 21:35 | 5.03 | 0% | 122.1° |
| 2025-05-27 Tue | 63 | 99 | 63 | 22:50–01:20 (good, 2.5 h) | 50.2° 21:30 | 4.98 | 1% | 107.2° |
| 2025-05-28 Wed | 60 | 94 | 56 | 22:55–01:10 (good, 2.25 h) | 50.2° 21:25 | 4.94 | 5% | 92.6° |
| 2025-05-29 Thu | 56 | 41 | 23 | 22:55–01:00 (marginal, 2.08 h) | 50.2° 21:20 | 4.9 | 11% | 78.3° |
| 2025-05-30 Fri | 51 | 0 | 0 | — | 50.2° 21:15 | 4.86 | 19% | 64.5° |
| 2025-05-31 Sat | 44 | 86 | 38 | 22:55–00:10 (good, 1.25 h) | 50.2° 21:15 | 4.82 | 28% | 51.2° |
| 2025-06-01 Sun | 34 | 65 | 22 | 22:10–00:45 (marginal, 2.58 h) | 50.2° 21:10 | 4.79 | 38% | 38.4° |
| 2025-06-02 Mon | 26 | 94 | 24 | 00:00–00:30 (good, 0.5 h) | 50.2° 21:05 | 4.75 | 48% | 26.0° |
| 2025-06-03 Tue | 21 | 100 | 21 | 23:00–01:20 (marginal, 2.33 h) | 50.2° 21:00 | 4.72 | 58% | 14.3° |
| 2025-06-04 Wed | 17 | 100 | 17 | 23:00–01:10 (marginal, 2.17 h) | 50.2° 21:00 | 4.69 | 67% | 5.9° |
| 2025-06-05 Thu | 13 | 0 | 0 | — | 50.2° 20:55 | 4.65 | 76% | 12.3° |
| 2025-06-06 Fri | 11 | 99 | 11 | 23:05–00:50 (marginal, 1.75 h) | 50.2° 20:50 | 4.63 | 83% | 23.4° |
| 2025-06-07 Sat | 10 | 100 | 10 | 23:05–00:40 (marginal, 1.58 h) | 50.2° 20:45 | 4.6 | 90% | 34.9° |
| 2025-06-08 Sun | 12 | 97 | 12 | 23:05–00:40 (marginal, 1.58 h) | 50.2° 20:40 | 4.57 | 95% | 46.7° |
| 2025-06-09 Mon | 14 | 85 | 12 | 23:05–00:40 (marginal, 1.58 h) | 50.2° 20:40 | 4.55 | 98% | 58.5° |
| 2025-06-10 Tue | 17 | 29 | 5 | 00:00–00:45 (marginal, 0.75 h) | 50.2° 20:35 | 4.53 | 100% | 70.5° |
| 2025-06-11 Wed | 20 | 100 | 20 | 23:10–23:45 (good, 0.58 h) | 50.2° 20:30 | 4.51 | 100% | 82.7° |
| 2025-06-12 Thu | 23 | 98 | 23 | 23:10–00:00 (good, 0.83 h) | 50.2° 20:25 | 4.49 | 97% | 95.1° |
| 2025-06-13 Fri | 30 | 35 | 10 | 00:00–00:45 (marginal, 0.75 h) | 50.2° 20:20 | 4.47 | 93% | 107.6° |
| 2025-06-14 Sat | 30 | 15 | 5 | — | 50.2° 20:20 | 4.46 | 87% | 120.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-05-16&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.