← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-03-20 Thu | 62 | 100 | 62 | 01:30–04:50 (good, 3.33 h) | 87.1° 07:05 | 8.71 | 65% | 71.3° |
| 2025-03-21 Fri | 72 | 52 | 37 | 00:50–03:00 (marginal, 2.17 h) | 87.1° 07:00 | 8.66 | 55% | 68.8° |
| 2025-03-22 Sat | 84 | 0 | 0 | — | 87.1° 06:55 | 8.61 | 45% | 67.2° |
| 2025-03-23 Sun | 93 | 0 | 0 | — | 87.1° 06:50 | 8.55 | 35% | 66.7° |
| 2025-03-24 Mon | 100 | 0 | 0 | — | 87.1° 06:45 | 8.5 | 26% | 67.5° |
| 2025-03-25 Tue | 100 | 0 | 0 | — | 87.1° 06:45 | 8.45 | 17% | 69.6° |
| 2025-03-26 Wed | 100 | 2 | 2 | — | 87.1° 06:40 | 8.39 | 9% | 73.1° |
| 2025-03-27 Thu | 100 | 2 | 2 | — | 87.1° 06:35 | 8.34 | 3% | 77.6° |
| 2025-03-28 Fri | 100 | 0 | 0 | — | 87.1° 06:30 | 8.29 | 0% | 83.0° |
| 2025-03-29 Sat | 100 | 0 | 0 | — | 87.1° 07:30 | 8.23 | 0% | 88.9° |
| 2025-03-30 Sun | 100 | 7 | 7 | 01:30–02:00 (marginal, 0.5 h) | 87.1° 07:25 | 8.18 | 3% | 94.9° |
| 2025-03-31 Mon | 100 | 0 | 0 | — | 87.1° 07:20 | 8.12 | 9% | 100.5° |
| 2025-04-01 Tue | 100 | 0 | 0 | — | 87.1° 07:15 | 8.07 | 17% | 105.4° |
| 2025-04-02 Wed | 100 | 0 | 0 | — | 87.1° 07:10 | 8.01 | 27% | 109.3° |
| 2025-04-03 Thu | 100 | 0 | 0 | — | 87.1° 07:10 | 7.96 | 37% | 111.9° |
| 2025-04-04 Fri | 100 | 0 | 0 | — | 87.1° 07:05 | 7.9 | 48% | 113.2° |
| 2025-04-05 Sat | 100 | 82 | 82 | 04:00–05:20 (good, 1.33 h) | 87.1° 07:00 | 7.85 | 59% | 113.1° |
| 2025-04-06 Sun | 100 | 0 | 0 | — | 87.1° 06:55 | 7.79 | 69% | 111.8° |
| 2025-04-07 Mon | 100 | 13 | 13 | 02:00–03:00 (marginal, 1.0 h) | 87.1° 06:50 | 7.74 | 78% | 109.4° |
| 2025-04-08 Tue | 86 | 65 | 56 | 03:00–05:15 (good, 2.25 h) | 87.1° 06:50 | 7.68 | 85% | 106.1° |
| 2025-04-09 Wed | 81 | 91 | 74 | 02:00–05:15 (good, 3.25 h) | 87.1° 06:45 | 7.62 | 92% | 102.3° |
| 2025-04-10 Thu | 74 | 22 | 17 | 05:00–05:10 (good, 0.17 h) | 87.1° 06:40 | 7.57 | 96% | 97.9° |
| 2025-04-11 Fri | 69 | 2 | 1 | — | 87.1° 06:35 | 7.51 | 99% | 93.3° |
| 2025-04-12 Sat | 64 | 10 | 6 | 00:15–01:00 (marginal, 0.75 h) | 87.1° 06:35 | 7.45 | 100% | 88.6° |
| 2025-04-13 Sun | 60 | 4 | 3 | — | 87.1° 06:30 | 7.39 | 99% | 84.0° |
| 2025-04-14 Mon | 59 | 9 | 5 | 02:20–03:00 (marginal, 0.67 h) | 87.1° 06:25 | 7.34 | 97% | 79.6° |
| 2025-04-15 Tue | 60 | 78 | 47 | 00:25–05:00 (marginal, 4.58 h) | 87.1° 06:20 | 7.28 | 92% | 75.6° |
| 2025-04-16 Wed | 63 | 95 | 60 | 02:15–05:00 (good, 2.75 h) | 87.1° 06:15 | 7.22 | 87% | 72.1° |
| 2025-04-17 Thu | 79 | 0 | 0 | — | 87.1° 06:15 | 7.16 | 79% | 69.3° |
| 2025-04-18 Fri | 88 | 0 | 0 | — | 87.1° 06:10 | 7.11 | 71% | 67.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-03-20&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.