← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-05-19 Mon | 83 | 95 | 79 | 00:30–04:00 (good, 3.5 h) | 87.3° 06:30 | 5.36 | 56% | 61.9° |
| 2025-05-20 Tue | 90 | 31 | 28 | 03:00–04:00 (good, 1.0 h) | 87.3° 06:25 | 5.31 | 45% | 59.3° |
| 2025-05-21 Wed | 96 | 74 | 71 | 00:15–02:00 (good, 1.75 h) | 87.3° 06:20 | 5.26 | 34% | 58.6° |
| 2025-05-22 Thu | 99 | 96 | 95 | 00:05–03:55 (good, 3.83 h) | 87.2° 06:15 | 5.21 | 24% | 59.9° |
| 2025-05-23 Fri | 100 | 6 | 6 | — | 87.2° 06:15 | 5.16 | 15% | 63.3° |
| 2025-05-24 Sat | 100 | 0 | 0 | — | 87.3° 06:10 | 5.12 | 7% | 68.6° |
| 2025-05-25 Sun | 100 | 0 | 0 | — | 87.3° 06:05 | 5.07 | 2% | 75.2° |
| 2025-05-26 Mon | 100 | 76 | 76 | 01:25–03:50 (good, 2.42 h) | 87.3° 06:00 | 5.03 | 0% | 82.6° |
| 2025-05-27 Tue | 100 | 99 | 99 | 23:40–03:50 (good, 4.17 h) | 87.2° 05:55 | 4.98 | 1% | 90.4° |
| 2025-05-28 Wed | 100 | 91 | 91 | 23:40–03:50 (good, 4.17 h) | 87.2° 05:55 | 4.94 | 5% | 98.0° |
| 2025-05-29 Thu | 100 | 15 | 15 | 23:30–01:00 (marginal, 1.5 h) | 87.3° 05:50 | 4.9 | 11% | 105.1° |
| 2025-05-30 Fri | 100 | 20 | 20 | 02:00–03:45 (marginal, 1.75 h) | 87.3° 05:45 | 4.86 | 19% | 111.2° |
| 2025-05-31 Sat | 100 | 85 | 85 | 23:45–03:45 (good, 4.0 h) | 87.3° 05:40 | 4.82 | 28% | 116.1° |
| 2025-06-01 Sun | 100 | 22 | 22 | 23:55–00:00 (good, 0.08 h) | 87.2° 05:35 | 4.79 | 38% | 119.5° |
| 2025-06-02 Mon | 100 | 99 | 99 | 23:30–03:45 (good, 4.25 h) | 87.2° 05:35 | 4.75 | 48% | 121.3° |
| 2025-06-03 Tue | 100 | 100 | 100 | 23:20–03:45 (good, 4.42 h) | 87.3° 05:30 | 4.72 | 58% | 121.5° |
| 2025-06-04 Wed | 100 | 100 | 100 | 23:20–03:40 (good, 4.33 h) | 87.3° 05:25 | 4.69 | 67% | 120.1° |
| 2025-06-05 Thu | 100 | 17 | 17 | 03:00–03:40 (good, 0.67 h) | 87.2° 05:20 | 4.65 | 76% | 117.3° |
| 2025-06-06 Fri | 100 | 100 | 100 | 23:20–03:40 (good, 4.33 h) | 87.2° 05:20 | 4.63 | 83% | 113.4° |
| 2025-06-07 Sat | 100 | 100 | 100 | 23:20–03:40 (good, 4.33 h) | 87.3° 05:15 | 4.6 | 90% | 108.6° |
| 2025-06-08 Sun | 86 | 99 | 86 | 23:20–03:40 (good, 4.33 h) | 87.3° 05:10 | 4.57 | 95% | 103.1° |
| 2025-06-09 Mon | 82 | 94 | 77 | 00:00–03:40 (good, 3.67 h) | 87.3° 05:05 | 4.55 | 98% | 97.1° |
| 2025-06-10 Tue | 75 | 53 | 40 | 00:00–02:00 (good, 2.0 h) | 87.2° 05:00 | 4.53 | 100% | 90.8° |
| 2025-06-11 Wed | 68 | 94 | 64 | 23:15–03:40 (good, 4.42 h) | 87.2° 05:00 | 4.51 | 100% | 84.4° |
| 2025-06-12 Thu | 64 | 100 | 64 | 23:10–03:40 (good, 4.5 h) | 87.3° 04:55 | 4.49 | 97% | 78.1° |
| 2025-06-13 Fri | 75 | 71 | 54 | 03:00–03:40 (good, 0.67 h) | 87.3° 04:50 | 4.47 | 93% | 72.1° |
| 2025-06-14 Sat | 82 | 38 | 31 | 02:00–02:40 (good, 0.67 h) | 87.3° 04:45 | 4.46 | 87% | 66.8° |
| 2025-06-15 Sun | 89 | 82 | 73 | 02:00–03:40 (good, 1.67 h) | 87.2° 04:40 | 4.45 | 79% | 62.4° |
| 2025-06-16 Mon | 92 | 97 | 90 | 23:10–03:40 (good, 4.5 h) | 87.2° 04:40 | 4.44 | 70% | 59.5° |
| 2025-06-17 Tue | 95 | 98 | 93 | 23:10–03:40 (good, 4.5 h) | 87.3° 04:35 | 4.43 | 60% | 58.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-05-19&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.