← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-08-12 Tue | 15 | 100 | 15 | 02:30–04:45 (marginal, 2.25 h) | 72.5° 07:40 | 6.48 | 84% | 52.8° |
| 2025-08-13 Wed | 14 | 100 | 14 | 02:25–04:45 (marginal, 2.33 h) | 72.5° 07:40 | 6.54 | 75% | 38.6° |
| 2025-08-14 Thu | 17 | 59 | 10 | 02:15–04:00 (marginal, 1.75 h) | 72.5° 07:35 | 6.6 | 65% | 24.3° |
| 2025-08-15 Fri | 24 | 100 | 24 | 02:00–04:50 (marginal, 2.83 h) | 72.5° 07:30 | 6.66 | 53% | 10.2° |
| 2025-08-16 Sat | 34 | 97 | 33 | 03:40–04:50 (good, 1.17 h) | 72.5° 07:25 | 6.71 | 42% | 4.1° |
| 2025-08-17 Sun | 44 | 94 | 41 | 02:35–04:50 (good, 2.25 h) | 72.5° 07:20 | 6.77 | 31% | 18.1° |
| 2025-08-18 Mon | 54 | 26 | 14 | 01:50–02:00 (marginal, 0.17 h) | 72.5° 07:20 | 6.83 | 21% | 32.1° |
| 2025-08-19 Tue | 66 | 0 | 0 | — | 72.5° 07:15 | 6.89 | 13% | 45.9° |
| 2025-08-20 Wed | 74 | 100 | 74 | 02:05–04:55 (good, 2.83 h) | 72.5° 07:10 | 6.94 | 6% | 59.6° |
| 2025-08-21 Thu | 77 | 100 | 77 | 02:00–04:55 (good, 2.92 h) | 72.5° 07:05 | 7.0 | 2% | 73.1° |
| 2025-08-22 Fri | 81 | 100 | 81 | 01:55–05:00 (good, 3.08 h) | 72.5° 07:00 | 7.06 | 0% | 86.3° |
| 2025-08-23 Sat | 83 | 98 | 81 | 02:00–05:00 (good, 3.0 h) | 72.5° 07:00 | 7.12 | 0% | 99.3° |
| 2025-08-24 Sun | 86 | 94 | 80 | 01:50–05:00 (good, 3.17 h) | 72.5° 06:55 | 7.17 | 3% | 112.0° |
| 2025-08-25 Mon | 89 | 94 | 84 | 01:55–05:05 (good, 3.17 h) | 72.5° 06:50 | 7.23 | 7% | 124.5° |
| 2025-08-26 Tue | 90 | 98 | 88 | 01:55–05:05 (good, 3.17 h) | 72.5° 06:45 | 7.29 | 13% | 136.7° |
| 2025-08-27 Wed | 92 | 100 | 92 | 01:35–05:05 (good, 3.5 h) | 72.5° 06:40 | 7.34 | 20% | 148.8° |
| 2025-08-28 Thu | 95 | 100 | 95 | 01:35–05:05 (good, 3.5 h) | 72.5° 06:40 | 7.4 | 28% | 160.7° |
| 2025-08-29 Fri | 97 | 100 | 97 | 01:30–05:10 (good, 3.67 h) | 72.5° 06:35 | 7.46 | 37% | 172.5° |
| 2025-08-30 Sat | 98 | 54 | 53 | 03:00–04:00 (good, 1.0 h) | 72.5° 06:30 | 7.51 | 47% | 175.6° |
| 2025-08-31 Sun | 100 | 100 | 100 | 01:20–05:10 (good, 3.83 h) | 72.5° 06:25 | 7.57 | 56% | 163.7° |
| 2025-09-01 Mon | 100 | 100 | 100 | 01:15–05:10 (good, 3.92 h) | 72.5° 06:25 | 7.62 | 66% | 151.6° |
| 2025-09-02 Tue | 100 | 100 | 100 | 01:20–05:15 (good, 3.92 h) | 72.5° 06:20 | 7.68 | 75% | 139.2° |
| 2025-09-03 Wed | 100 | 49 | 49 | 04:05–05:00 (good, 0.92 h) | 72.5° 06:15 | 7.74 | 83% | 126.5° |
| 2025-09-04 Thu | 100 | 40 | 40 | 04:00–05:15 (good, 1.25 h) | 72.5° 06:10 | 7.79 | 90% | 113.5° |
| 2025-09-05 Fri | 95 | 23 | 22 | 04:55–05:00 (good, 0.08 h) | 72.5° 06:05 | 7.85 | 96% | 100.0° |
| 2025-09-06 Sat | 64 | 82 | 52 | 02:30–03:00 (good, 0.5 h) | 72.5° 06:05 | 7.9 | 99% | 86.2° |
| 2025-09-07 Sun | 47 | 0 | 0 | — | 72.5° 06:00 | 7.96 | 100% | 72.0° |
| 2025-09-08 Mon | 32 | 90 | 29 | 01:10–05:20 (marginal, 4.17 h) | 72.5° 05:55 | 8.01 | 98% | 57.6° |
| 2025-09-09 Tue | 21 | 98 | 20 | 01:00–05:25 (marginal, 4.42 h) | 72.5° 05:50 | 8.06 | 94% | 43.0° |
| 2025-09-10 Wed | 16 | 55 | 9 | 01:00–02:00 (marginal, 1.0 h) | 72.5° 05:45 | 8.12 | 87% | 28.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-08-12&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.