← 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 | 19 | 93 | 18 | 01:40–04:00 (marginal, 2.33 h) | 79.1° 07:20 | 5.01 | 73% | 40.6° |
| 2025-07-16 Wed | 21 | 93 | 20 | 01:40–04:00 (marginal, 2.33 h) | 79.1° 07:15 | 5.05 | 62% | 28.5° |
| 2025-07-17 Thu | 29 | 61 | 18 | 01:20–04:00 (marginal, 2.67 h) | 79.1° 07:10 | 5.1 | 51% | 18.6° |
| 2025-07-18 Fri | 38 | 90 | 34 | 02:05–04:00 (good, 1.92 h) | 79.1° 07:05 | 5.14 | 40% | 16.4° |
| 2025-07-19 Sat | 48 | 100 | 48 | 01:50–04:05 (good, 2.25 h) | 79.1° 07:05 | 5.19 | 29% | 24.2° |
| 2025-07-20 Sun | 58 | 100 | 58 | 01:30–04:05 (good, 2.58 h) | 79.1° 07:00 | 5.24 | 19% | 36.1° |
| 2025-07-21 Mon | 68 | 100 | 68 | 01:30–04:10 (good, 2.67 h) | 79.1° 06:55 | 5.28 | 11% | 49.2° |
| 2025-07-22 Tue | 73 | 100 | 73 | 01:25–04:10 (good, 2.75 h) | 79.1° 06:50 | 5.33 | 5% | 62.7° |
| 2025-07-23 Wed | 77 | 100 | 77 | 01:20–04:10 (good, 2.83 h) | 79.1° 06:50 | 5.38 | 1% | 76.2° |
| 2025-07-24 Thu | 80 | 100 | 80 | 01:15–04:15 (good, 3.0 h) | 79.1° 06:45 | 5.43 | 0% | 89.5° |
| 2025-07-25 Fri | 82 | 100 | 82 | 01:15–04:15 (good, 3.0 h) | 79.1° 06:40 | 5.48 | 2% | 102.6° |
| 2025-07-26 Sat | 84 | 100 | 84 | 01:10–04:15 (good, 3.08 h) | 79.1° 06:35 | 5.54 | 5% | 115.3° |
| 2025-07-27 Sun | 89 | 94 | 84 | 01:05–04:20 (good, 3.25 h) | 79.1° 06:30 | 5.59 | 11% | 127.6° |
| 2025-07-28 Mon | 91 | 99 | 90 | 01:00–04:20 (good, 3.33 h) | 79.1° 06:30 | 5.64 | 18% | 139.2° |
| 2025-07-29 Tue | 92 | 99 | 91 | 01:00–04:20 (good, 3.33 h) | 79.1° 06:25 | 5.7 | 26% | 150.1° |
| 2025-07-30 Wed | 95 | 0 | 0 | — | 79.1° 06:20 | 5.75 | 35% | 159.2° |
| 2025-07-31 Thu | 97 | 14 | 14 | 04:00–04:25 (good, 0.42 h) | 79.1° 06:15 | 5.81 | 44% | 164.2° |
| 2025-08-01 Fri | 99 | 84 | 84 | 01:05–04:25 (good, 3.33 h) | 79.1° 06:10 | 5.86 | 54% | 161.4° |
| 2025-08-02 Sat | 100 | 100 | 100 | 00:40–04:25 (good, 3.75 h) | 79.1° 06:10 | 5.92 | 63% | 153.3° |
| 2025-08-03 Sun | 100 | 99 | 99 | 00:45–04:30 (good, 3.75 h) | 79.1° 06:05 | 5.97 | 72% | 143.1° |
| 2025-08-04 Mon | 100 | 44 | 44 | 02:00–04:00 (good, 2.0 h) | 79.1° 06:00 | 6.03 | 80% | 132.0° |
| 2025-08-05 Tue | 100 | 75 | 75 | 00:40–02:00 (good, 1.33 h) | 79.1° 05:55 | 6.08 | 88% | 120.3° |
| 2025-08-06 Wed | 100 | 54 | 54 | 02:00–04:35 (good, 2.58 h) | 79.1° 05:55 | 6.14 | 94% | 108.3° |
| 2025-08-07 Thu | 75 | 43 | 32 | 04:00–04:35 (good, 0.58 h) | 79.1° 05:50 | 6.2 | 98% | 95.9° |
| 2025-08-08 Fri | 60 | 100 | 60 | 01:40–04:35 (good, 2.92 h) | 79.1° 05:45 | 6.25 | 100% | 83.1° |
| 2025-08-09 Sat | 47 | 100 | 47 | 03:10–04:40 (good, 1.5 h) | 79.1° 05:40 | 6.31 | 100% | 70.1° |
| 2025-08-10 Sun | 35 | 100 | 35 | 00:00–04:40 (marginal, 4.67 h) | 79.1° 05:35 | 6.37 | 97% | 56.9° |
| 2025-08-11 Mon | 26 | 100 | 26 | 00:00–04:40 (marginal, 4.67 h) | 79.1° 05:35 | 6.43 | 92% | 43.8° |
| 2025-08-12 Tue | 23 | 100 | 23 | 23:55–04:45 (marginal, 4.83 h) | 79.1° 05:30 | 6.48 | 84% | 31.2° |
| 2025-08-13 Wed | 30 | 100 | 30 | 23:40–04:45 (marginal, 5.08 h) | 79.1° 05:25 | 6.54 | 75% | 20.3° |
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.