← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-05-25 Sun | 0 | 0 | 0 | — | 79.1° 10:40 | 5.07 | 2% | 21.0° |
| 2025-05-26 Mon | 0 | 67 | 0 | — | 79.1° 10:35 | 5.03 | 0% | 32.6° |
| 2025-05-27 Tue | 0 | 97 | 0 | — | 79.1° 10:30 | 4.98 | 1% | 46.0° |
| 2025-05-28 Wed | 1 | 90 | 1 | — | 79.1° 10:30 | 4.94 | 5% | 59.7° |
| 2025-05-29 Thu | 0 | 0 | 0 | — | 79.1° 10:25 | 4.9 | 11% | 73.4° |
| 2025-05-30 Fri | 1 | 0 | 0 | — | 79.1° 10:20 | 4.86 | 19% | 86.7° |
| 2025-05-31 Sat | 1 | 93 | 1 | — | 79.1° 10:15 | 4.82 | 28% | 99.6° |
| 2025-06-01 Sun | 1 | 25 | 0 | — | 79.1° 10:10 | 4.79 | 38% | 112.0° |
| 2025-06-02 Mon | 1 | 100 | 1 | — | 79.1° 10:10 | 4.75 | 48% | 123.9° |
| 2025-06-03 Tue | 1 | 100 | 1 | — | 79.1° 10:05 | 4.72 | 58% | 135.4° |
| 2025-06-04 Wed | 1 | 100 | 1 | — | 79.1° 10:00 | 4.69 | 67% | 146.2° |
| 2025-06-05 Thu | 2 | 62 | 1 | — | 79.1° 09:55 | 4.65 | 76% | 155.8° |
| 2025-06-06 Fri | 2 | 100 | 2 | 04:25–04:30 (marginal, 0.08 h) | 79.1° 09:55 | 4.63 | 83% | 162.7° |
| 2025-06-07 Sat | 2 | 100 | 2 | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:50 | 4.6 | 90% | 163.0° |
| 2025-06-08 Sun | 2 | 100 | 2 | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:45 | 4.57 | 95% | 156.5° |
| 2025-06-09 Mon | 2 | 91 | 2 | — | 79.1° 09:40 | 4.55 | 98% | 146.9° |
| 2025-06-10 Tue | 2 | 10 | 0 | — | 79.1° 09:35 | 4.53 | 100% | 136.1° |
| 2025-06-11 Wed | 3 | 93 | 3 | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:35 | 4.51 | 100% | 124.7° |
| 2025-06-12 Thu | 3 | 100 | 3 | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:30 | 4.49 | 97% | 112.9° |
| 2025-06-13 Fri | 3 | 97 | 3 | 03:30–03:40 (marginal, 0.17 h) | 79.1° 09:25 | 4.47 | 93% | 100.8° |
| 2025-06-14 Sat | 3 | 69 | 2 | — | 79.1° 09:20 | 4.46 | 87% | 88.5° |
| 2025-06-15 Sun | 4 | 98 | 4 | 03:25–03:40 (marginal, 0.25 h) | 79.1° 09:15 | 4.45 | 79% | 76.0° |
| 2025-06-16 Mon | 4 | 100 | 4 | 03:20–03:40 (marginal, 0.33 h) | 79.1° 09:15 | 4.44 | 70% | 63.4° |
| 2025-06-17 Tue | 4 | 100 | 4 | 03:15–03:40 (marginal, 0.42 h) | 79.1° 09:10 | 4.43 | 60% | 50.6° |
| 2025-06-18 Wed | 6 | 100 | 6 | 03:10–03:40 (marginal, 0.5 h) | 79.1° 09:05 | 4.43 | 49% | 38.0° |
| 2025-06-19 Thu | 7 | 100 | 7 | 03:05–03:40 (marginal, 0.58 h) | 79.1° 09:00 | 4.42 | 37% | 26.0° |
| 2025-06-20 Fri | 9 | 89 | 8 | 03:05–03:40 (marginal, 0.58 h) | 79.1° 09:00 | 4.42 | 26% | 17.2° |
| 2025-06-21 Sat | 12 | 100 | 12 | 03:35–03:40 (good, 0.08 h) | 79.1° 08:55 | 4.42 | 17% | 17.9° |
| 2025-06-22 Sun | 14 | 100 | 14 | 03:25–03:40 (good, 0.25 h) | 79.1° 08:50 | 4.42 | 9% | 27.7° |
| 2025-06-23 Mon | 17 | 100 | 17 | 03:20–03:40 (good, 0.33 h) | 79.1° 08:45 | 4.43 | 3% | 40.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-05-25&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.