← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-04-30 Wed | 92 | 95 | 88 | 22:10–02:45 (good, 4.58 h) | 50.2° 23:15 | 6.41 | 14% | 100.8° |
| 2025-05-01 Thu | 88 | 12 | 10 | 22:10–23:00 (marginal, 0.83 h) | 50.2° 23:10 | 6.35 | 23% | 86.7° |
| 2025-05-02 Fri | 83 | 97 | 81 | 22:10–03:00 (good, 4.83 h) | 50.2° 23:05 | 6.29 | 33% | 73.0° |
| 2025-05-03 Sat | 75 | 100 | 75 | 22:15–02:55 (good, 4.67 h) | 50.2° 23:05 | 6.23 | 43% | 59.8° |
| 2025-05-04 Sun | 57 | 37 | 21 | 23:00–01:00 (marginal, 2.0 h) | 50.2° 23:00 | 6.18 | 54% | 47.0° |
| 2025-05-05 Mon | 41 | 84 | 34 | 22:15–02:25 (marginal, 4.17 h) | 50.2° 22:55 | 6.12 | 64% | 34.6° |
| 2025-05-06 Tue | 30 | 0 | 0 | — | 50.2° 22:50 | 6.06 | 73% | 22.6° |
| 2025-05-07 Wed | 24 | 98 | 23 | 22:20–02:50 (marginal, 4.5 h) | 50.2° 22:50 | 6.0 | 81% | 11.3° |
| 2025-05-08 Thu | 20 | 86 | 17 | 00:00–02:40 (marginal, 2.67 h) | 50.2° 22:45 | 5.95 | 88% | 6.0° |
| 2025-05-09 Fri | 17 | 0 | 0 | — | 50.2° 22:40 | 5.89 | 93% | 15.1° |
| 2025-05-10 Sat | 17 | 5 | 1 | — | 50.2° 22:35 | 5.84 | 97% | 26.4° |
| 2025-05-11 Sun | 22 | 0 | 0 | — | 50.2° 22:30 | 5.78 | 99% | 38.0° |
| 2025-05-12 Mon | 31 | 2 | 1 | — | 50.2° 22:30 | 5.73 | 100% | 49.8° |
| 2025-05-13 Tue | 42 | 0 | 0 | — | 50.2° 22:25 | 5.67 | 98% | 61.6° |
| 2025-05-14 Wed | 71 | 88 | 63 | 23:00–01:00 (good, 2.0 h) | 50.2° 22:20 | 5.62 | 95% | 73.6° |
| 2025-05-15 Thu | 76 | 0 | 0 | — | 50.2° 22:15 | 5.56 | 90% | 85.8° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-04-30&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.