← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-07-15 Tue | 36 | 92 | 33 | 00:00–04:00 (marginal, 4.0 h) | 89.6° 06:30 | 5.01 | 73% | 44.0° |
| 2025-07-16 Wed | 41 | 90 | 37 | 23:50–04:00 (marginal, 4.17 h) | 89.7° 06:25 | 5.05 | 62% | 35.6° |
| 2025-07-17 Thu | 51 | 64 | 32 | 02:35–03:00 (good, 0.42 h) | 89.7° 06:20 | 5.1 | 51% | 30.6° |
| 2025-07-18 Fri | 70 | 92 | 64 | 00:20–04:00 (good, 3.67 h) | 89.6° 06:15 | 5.14 | 40% | 31.1° |
| 2025-07-19 Sat | 82 | 100 | 82 | 00:10–04:05 (good, 3.92 h) | 89.5° 06:15 | 5.19 | 29% | 37.0° |
| 2025-07-20 Sun | 92 | 100 | 92 | 00:05–04:05 (good, 4.0 h) | 89.6° 06:10 | 5.24 | 19% | 46.3° |
| 2025-07-21 Mon | 97 | 100 | 97 | 00:00–04:10 (good, 4.17 h) | 89.7° 06:05 | 5.28 | 11% | 57.3° |
| 2025-07-22 Tue | 100 | 100 | 100 | 23:55–04:10 (good, 4.25 h) | 89.7° 06:00 | 5.33 | 5% | 69.1° |
| 2025-07-23 Wed | 100 | 97 | 97 | 00:00–04:10 (good, 4.17 h) | 89.6° 05:55 | 5.38 | 1% | 81.1° |
| 2025-07-24 Thu | 100 | 100 | 100 | 23:50–04:15 (good, 4.42 h) | 89.5° 05:55 | 5.43 | 0% | 93.1° |
| 2025-07-25 Fri | 100 | 100 | 100 | 23:45–04:15 (good, 4.5 h) | 89.7° 05:50 | 5.48 | 2% | 104.8° |
| 2025-07-26 Sat | 100 | 100 | 100 | 23:40–04:15 (good, 4.58 h) | 89.7° 05:45 | 5.54 | 5% | 116.0° |
| 2025-07-27 Sun | 100 | 96 | 96 | 23:40–04:20 (good, 4.67 h) | 89.6° 05:40 | 5.59 | 11% | 126.5° |
| 2025-07-28 Mon | 100 | 99 | 99 | 23:35–04:20 (good, 4.75 h) | 89.5° 05:35 | 5.64 | 18% | 135.9° |
| 2025-07-29 Tue | 100 | 95 | 95 | 00:00–04:20 (good, 4.33 h) | 89.6° 05:35 | 5.7 | 26% | 143.6° |
| 2025-07-30 Wed | 100 | 0 | 0 | — | 89.7° 05:30 | 5.75 | 35% | 148.6° |
| 2025-07-31 Thu | 100 | 10 | 10 | 04:00–04:25 (good, 0.42 h) | 89.7° 05:25 | 5.81 | 44% | 149.9° |
| 2025-08-01 Fri | 100 | 86 | 86 | 23:35–04:25 (good, 4.83 h) | 89.6° 05:20 | 5.86 | 54% | 147.1° |
| 2025-08-02 Sat | 100 | 100 | 100 | 23:20–04:25 (good, 5.08 h) | 89.5° 05:15 | 5.92 | 63% | 141.1° |
| 2025-08-03 Sun | 100 | 99 | 99 | 23:20–04:30 (good, 5.17 h) | 89.6° 05:15 | 5.97 | 72% | 133.0° |
| 2025-08-04 Mon | 100 | 41 | 41 | 02:00–04:00 (good, 2.0 h) | 89.7° 05:10 | 6.03 | 80% | 123.8° |
| 2025-08-05 Tue | 100 | 71 | 71 | 00:00–03:00 (good, 3.0 h) | 89.7° 05:05 | 6.08 | 88% | 113.6° |
| 2025-08-06 Wed | 100 | 43 | 43 | 02:00–04:35 (good, 2.58 h) | 89.6° 05:00 | 6.14 | 94% | 102.9° |
| 2025-08-07 Thu | 82 | 35 | 29 | 04:00–04:35 (good, 0.58 h) | 89.5° 05:00 | 6.2 | 98% | 91.7° |
| 2025-08-08 Fri | 73 | 100 | 73 | 00:35–04:35 (good, 4.0 h) | 89.6° 04:55 | 6.25 | 100% | 80.3° |
| 2025-08-09 Sat | 60 | 100 | 60 | 02:40–04:40 (good, 2.0 h) | 89.7° 04:50 | 6.31 | 100% | 68.7° |
| 2025-08-10 Sun | 46 | 100 | 46 | 22:20–04:40 (marginal, 6.33 h) | 89.7° 04:45 | 6.37 | 97% | 57.3° |
| 2025-08-11 Mon | 39 | 100 | 39 | 22:15–04:40 (marginal, 6.42 h) | 89.5° 04:40 | 6.43 | 92% | 46.5° |
| 2025-08-12 Tue | 40 | 100 | 40 | 22:15–04:45 (marginal, 6.5 h) | 89.6° 04:40 | 6.48 | 84% | 37.2° |
| 2025-08-13 Wed | 51 | 100 | 51 | 22:10–04:45 (marginal, 6.58 h) | 89.7° 04:35 | 6.54 | 75% | 31.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-07-15&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.