← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-07-18 Fri | 100 | 93 | 93 | 22:55–04:00 (good, 5.08 h) | 87.1° 00:10 | 5.14 | 40% | 97.3° |
| 2025-07-19 Sat | 100 | 100 | 100 | 22:55–04:05 (good, 5.17 h) | 87.1° 00:05 | 5.19 | 29% | 102.6° |
| 2025-07-20 Sun | 100 | 100 | 100 | 22:55–04:05 (good, 5.17 h) | 87.1° 00:05 | 5.24 | 19% | 107.2° |
| 2025-07-21 Mon | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 87.1° 00:00 | 5.28 | 11% | 110.7° |
| 2025-07-22 Tue | 100 | 100 | 100 | 22:50–04:10 (good, 5.33 h) | 87.1° 23:55 | 5.33 | 5% | 113.0° |
| 2025-07-23 Wed | 100 | 92 | 92 | 22:50–04:10 (good, 5.33 h) | 87.1° 23:50 | 5.38 | 1% | 113.8° |
| 2025-07-24 Thu | 100 | 99 | 99 | 22:45–04:15 (good, 5.5 h) | 87.1° 23:50 | 5.43 | 0% | 113.1° |
| 2025-07-25 Fri | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 87.1° 23:45 | 5.48 | 2% | 111.0° |
| 2025-07-26 Sat | 100 | 100 | 100 | 22:45–04:15 (good, 5.5 h) | 87.1° 23:40 | 5.54 | 5% | 107.9° |
| 2025-07-27 Sun | 100 | 97 | 97 | 22:45–04:20 (good, 5.58 h) | 87.1° 23:35 | 5.59 | 11% | 103.9° |
| 2025-07-28 Mon | 100 | 99 | 99 | 22:40–04:20 (good, 5.67 h) | 87.1° 23:30 | 5.64 | 18% | 99.5° |
| 2025-07-29 Tue | 100 | 90 | 90 | 22:40–04:20 (good, 5.67 h) | 87.1° 23:30 | 5.7 | 26% | 94.8° |
| 2025-07-30 Wed | 100 | 0 | 0 | — | 87.1° 23:25 | 5.75 | 35% | 89.9° |
| 2025-07-31 Thu | 100 | 7 | 7 | 04:00–04:25 (marginal, 0.42 h) | 87.1° 23:20 | 5.81 | 44% | 85.1° |
| 2025-08-01 Fri | 100 | 86 | 86 | 22:35–04:25 (good, 5.83 h) | 87.1° 23:15 | 5.86 | 54% | 80.6° |
| 2025-08-02 Sat | 100 | 100 | 100 | 22:35–04:25 (good, 5.83 h) | 87.1° 23:10 | 5.92 | 63% | 76.4° |
| 2025-08-03 Sun | 100 | 99 | 99 | 22:30–04:30 (good, 6.0 h) | 87.1° 23:10 | 5.97 | 72% | 72.7° |
| 2025-08-04 Mon | 100 | 44 | 44 | 02:00–04:00 (good, 2.0 h) | 87.1° 23:05 | 6.03 | 80% | 69.6° |
| 2025-08-05 Tue | 92 | 67 | 61 | 00:00–02:00 (good, 2.0 h) | 87.1° 23:00 | 6.08 | 88% | 67.5° |
| 2025-08-06 Wed | 85 | 35 | 30 | 03:40–04:20 (good, 0.67 h) | 87.1° 22:55 | 6.14 | 94% | 66.4° |
| 2025-08-07 Thu | 65 | 29 | 19 | 03:00–04:35 (marginal, 1.58 h) | 87.1° 22:50 | 6.2 | 98% | 66.5° |
| 2025-08-08 Fri | 66 | 100 | 66 | 22:20–01:50 (good, 3.5 h) | 87.1° 22:50 | 6.25 | 100% | 67.9° |
| 2025-08-09 Sat | 69 | 100 | 69 | 22:20–01:40 (good, 3.33 h) | 87.1° 22:45 | 6.31 | 100% | 70.6° |
| 2025-08-10 Sun | 72 | 100 | 72 | 22:20–01:55 (good, 3.58 h) | 87.1° 22:40 | 6.37 | 97% | 74.5° |
| 2025-08-11 Mon | 77 | 100 | 77 | 22:15–02:25 (good, 4.17 h) | 87.1° 22:35 | 6.43 | 92% | 79.2° |
| 2025-08-12 Tue | 82 | 100 | 82 | 22:15–03:05 (good, 4.83 h) | 87.1° 22:35 | 6.48 | 84% | 84.6° |
| 2025-08-13 Wed | 100 | 100 | 100 | 22:10–03:55 (good, 5.75 h) | 87.1° 22:30 | 6.54 | 75% | 90.3° |
| 2025-08-14 Thu | 100 | 88 | 88 | 22:10–03:20 (good, 5.17 h) | 87.1° 22:25 | 6.6 | 65% | 95.9° |
| 2025-08-15 Fri | 100 | 99 | 99 | 22:10–04:05 (good, 5.92 h) | 87.1° 22:20 | 6.66 | 53% | 101.3° |
| 2025-08-16 Sat | 100 | 99 | 99 | 22:05–04:05 (good, 6.0 h) | 87.1° 22:15 | 6.71 | 42% | 106.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-07-18&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.