← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-06-18 Wed | 24 | 100 | 24 | 02:35–03:40 (good, 1.08 h) | 89.7° 08:15 | 4.43 | 49% | 42.1° |
| 2025-06-19 Thu | 29 | 100 | 29 | 02:25–03:40 (good, 1.25 h) | 89.7° 08:10 | 4.42 | 37% | 34.2° |
| 2025-06-20 Fri | 35 | 90 | 32 | 02:25–03:40 (good, 1.25 h) | 89.6° 08:05 | 4.42 | 26% | 30.4° |
| 2025-06-21 Sat | 41 | 98 | 40 | 02:00–03:40 (good, 1.67 h) | 89.5° 08:05 | 4.42 | 17% | 32.5° |
| 2025-06-22 Sun | 47 | 100 | 47 | 01:55–03:40 (good, 1.75 h) | 89.6° 08:00 | 4.42 | 9% | 39.7° |
| 2025-06-23 Mon | 49 | 100 | 49 | 01:50–03:40 (good, 1.83 h) | 89.7° 07:55 | 4.43 | 3% | 49.9° |
| 2025-06-24 Tue | 50 | 100 | 50 | 01:45–03:40 (good, 1.92 h) | 89.7° 07:50 | 4.44 | 1% | 61.5° |
| 2025-06-25 Wed | 53 | 100 | 53 | 01:45–03:40 (good, 1.92 h) | 89.5° 07:45 | 4.45 | 0% | 73.6° |
| 2025-06-26 Thu | 55 | 100 | 55 | 01:40–03:40 (good, 2.0 h) | 89.5° 07:45 | 4.46 | 3% | 85.8° |
| 2025-06-27 Fri | 56 | 68 | 38 | 01:40–03:00 (good, 1.33 h) | 89.7° 07:40 | 4.47 | 8% | 97.7° |
| 2025-06-28 Sat | 58 | 45 | 26 | 03:00–03:40 (good, 0.67 h) | 89.7° 07:35 | 4.48 | 15% | 109.2° |
| 2025-06-29 Sun | 60 | 100 | 60 | 01:30–03:40 (good, 2.17 h) | 89.6° 07:30 | 4.5 | 23% | 120.0° |
| 2025-06-30 Mon | 63 | 92 | 58 | 01:25–03:45 (good, 2.33 h) | 89.5° 07:25 | 4.52 | 32% | 129.9° |
| 2025-07-01 Tue | 65 | 98 | 64 | 01:25–03:45 (good, 2.33 h) | 89.6° 07:25 | 4.54 | 42% | 138.6° |
| 2025-07-02 Wed | 66 | 100 | 66 | 01:15–03:45 (good, 2.5 h) | 89.7° 07:20 | 4.56 | 51% | 145.4° |
| 2025-07-03 Thu | 68 | 100 | 68 | 01:10–03:45 (good, 2.58 h) | 89.7° 07:15 | 4.59 | 61% | 149.3° |
| 2025-07-04 Fri | 70 | 100 | 70 | 01:15–03:45 (good, 2.5 h) | 89.6° 07:10 | 4.62 | 70% | 149.2° |
| 2025-07-05 Sat | 73 | 100 | 73 | 01:10–03:50 (good, 2.67 h) | 89.5° 07:10 | 4.64 | 78% | 145.3° |
| 2025-07-06 Sun | 74 | 100 | 74 | 01:10–03:50 (good, 2.67 h) | 89.6° 07:05 | 4.67 | 85% | 138.5° |
| 2025-07-07 Mon | 74 | 99 | 74 | 01:05–03:50 (good, 2.75 h) | 89.7° 07:00 | 4.7 | 91% | 130.0° |
| 2025-07-08 Tue | 68 | 100 | 68 | 01:05–03:50 (good, 2.75 h) | 89.7° 06:55 | 4.74 | 96% | 120.3° |
| 2025-07-09 Wed | 61 | 100 | 61 | 01:05–03:50 (good, 2.75 h) | 89.5° 06:50 | 4.77 | 99% | 110.0° |
| 2025-07-10 Thu | 56 | 80 | 45 | 03:00–03:55 (good, 0.92 h) | 89.5° 06:50 | 4.81 | 100% | 99.1° |
| 2025-07-11 Fri | 48 | 60 | 29 | 02:00–03:55 (marginal, 1.92 h) | 89.7° 06:45 | 4.85 | 99% | 88.0° |
| 2025-07-12 Sat | 41 | 89 | 37 | 02:50–03:55 (good, 1.08 h) | 89.7° 06:40 | 4.88 | 95% | 76.6° |
| 2025-07-13 Sun | 36 | 48 | 17 | 03:00–03:55 (marginal, 0.92 h) | 89.6° 06:35 | 4.92 | 90% | 65.3° |
| 2025-07-14 Mon | 35 | 100 | 35 | 00:00–04:00 (marginal, 4.0 h) | 89.5° 06:30 | 4.97 | 82% | 54.3° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-06-18&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.