← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-05-21 Wed | 7 | 68 | 5 | 03:45–04:00 (marginal, 0.25 h) | 89.7° 10:05 | 5.26 | 34% | 49.6° |
| 2025-05-22 Thu | 7 | 89 | 6 | 03:25–03:55 (marginal, 0.5 h) | 89.7° 10:00 | 5.21 | 24% | 39.8° |
| 2025-05-23 Fri | 10 | 21 | 2 | — | 89.6° 09:55 | 5.16 | 15% | 32.7° |
| 2025-05-24 Sat | 11 | 0 | 0 | — | 89.5° 09:55 | 5.12 | 7% | 30.6° |
| 2025-05-25 Sun | 12 | 0 | 0 | — | 89.6° 09:50 | 5.07 | 2% | 34.8° |
| 2025-05-26 Mon | 12 | 80 | 10 | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:45 | 5.03 | 0% | 43.6° |
| 2025-05-27 Tue | 14 | 100 | 14 | 03:35–03:50 (good, 0.25 h) | 89.7° 09:40 | 4.98 | 1% | 54.6° |
| 2025-05-28 Wed | 15 | 89 | 13 | 03:45–03:50 (good, 0.08 h) | 89.5° 09:35 | 4.94 | 5% | 66.5° |
| 2025-05-29 Thu | 16 | 0 | 0 | — | 89.5° 09:35 | 4.9 | 11% | 78.6° |
| 2025-05-30 Fri | 17 | 30 | 5 | 03:30–03:45 (marginal, 0.25 h) | 89.7° 09:30 | 4.86 | 19% | 90.5° |
| 2025-05-31 Sat | 18 | 88 | 16 | 03:40–03:45 (good, 0.08 h) | 89.7° 09:25 | 4.82 | 28% | 102.1° |
| 2025-06-01 Sun | 19 | 4 | 1 | — | 89.6° 09:20 | 4.79 | 38% | 113.0° |
| 2025-06-02 Mon | 21 | 100 | 21 | 03:15–03:45 (good, 0.5 h) | 89.5° 09:15 | 4.75 | 48% | 123.3° |
| 2025-06-03 Tue | 23 | 100 | 23 | 03:10–03:45 (good, 0.58 h) | 89.6° 09:15 | 4.72 | 58% | 132.7° |
| 2025-06-04 Wed | 23 | 100 | 23 | 03:05–03:40 (good, 0.58 h) | 89.7° 09:10 | 4.69 | 67% | 140.8° |
| 2025-06-05 Thu | 24 | 51 | 12 | 03:00–03:40 (marginal, 0.67 h) | 89.7° 09:05 | 4.65 | 76% | 146.7° |
| 2025-06-06 Fri | 24 | 100 | 24 | 03:05–03:40 (good, 0.58 h) | 89.6° 09:00 | 4.63 | 83% | 149.5° |
| 2025-06-07 Sat | 25 | 100 | 25 | 03:00–03:40 (good, 0.67 h) | 89.5° 09:00 | 4.6 | 90% | 148.2° |
| 2025-06-08 Sun | 24 | 100 | 24 | 03:00–03:40 (good, 0.67 h) | 89.6° 08:55 | 4.57 | 95% | 143.4° |
| 2025-06-09 Mon | 24 | 97 | 23 | 02:55–03:40 (good, 0.75 h) | 89.7° 08:50 | 4.55 | 98% | 136.1° |
| 2025-06-10 Tue | 25 | 39 | 10 | 03:10–03:40 (marginal, 0.5 h) | 89.7° 08:45 | 4.53 | 100% | 127.2° |
| 2025-06-11 Wed | 25 | 90 | 23 | 03:05–03:40 (good, 0.58 h) | 89.5° 08:40 | 4.51 | 100% | 117.4° |
| 2025-06-12 Thu | 23 | 100 | 23 | 02:55–03:40 (good, 0.75 h) | 89.5° 08:40 | 4.49 | 97% | 107.0° |
| 2025-06-13 Fri | 22 | 93 | 20 | 03:00–03:40 (good, 0.67 h) | 89.7° 08:35 | 4.47 | 93% | 96.2° |
| 2025-06-14 Sat | 20 | 74 | 15 | 02:00–03:40 (marginal, 1.67 h) | 89.7° 08:30 | 4.46 | 87% | 85.2° |
| 2025-06-15 Sun | 20 | 94 | 19 | 02:00–03:40 (marginal, 1.67 h) | 89.6° 08:25 | 4.45 | 79% | 74.0° |
| 2025-06-16 Mon | 20 | 100 | 20 | 03:15–03:40 (good, 0.42 h) | 89.5° 08:20 | 4.44 | 70% | 62.9° |
| 2025-06-17 Tue | 22 | 100 | 22 | 02:45–03:40 (good, 0.92 h) | 89.6° 08:20 | 4.43 | 60% | 52.1° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-05-21&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.