← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-03-30 Sun | 93 | 16 | 15 | 00:00–02:00 (marginal, 2.0 h) | 50.2° 01:15 | 8.18 | 3% | 153.4° |
| 2025-03-31 Mon | 93 | 0 | 0 | — | 50.2° 01:15 | 8.12 | 9% | 138.6° |
| 2025-04-01 Tue | 93 | 0 | 0 | — | 50.2° 01:10 | 8.07 | 17% | 123.9° |
| 2025-04-02 Wed | 93 | 0 | 0 | — | 50.2° 01:05 | 8.01 | 27% | 109.6° |
| 2025-04-03 Thu | 91 | 1 | 1 | — | 50.2° 01:00 | 7.96 | 37% | 95.6° |
| 2025-04-04 Fri | 86 | 4 | 3 | 21:40–22:00 (marginal, 0.33 h) | 50.2° 01:00 | 7.9 | 48% | 82.1° |
| 2025-04-05 Sat | 82 | 86 | 71 | 01:00–03:00 (good, 2.0 h) | 50.2° 00:55 | 7.85 | 59% | 69.0° |
| 2025-04-06 Sun | 64 | 0 | 0 | — | 50.2° 00:50 | 7.79 | 69% | 56.2° |
| 2025-04-07 Mon | 51 | 46 | 23 | 21:35–00:00 (marginal, 2.42 h) | 50.2° 00:45 | 7.74 | 78% | 43.7° |
| 2025-04-08 Tue | 34 | 35 | 12 | 02:00–04:30 (marginal, 2.5 h) | 50.2° 00:40 | 7.68 | 85% | 31.5° |
| 2025-04-09 Wed | 27 | 88 | 24 | 01:20–04:35 (marginal, 3.25 h) | 50.2° 00:40 | 7.62 | 92% | 19.6° |
| 2025-04-10 Thu | 23 | 6 | 1 | — | 50.2° 00:35 | 7.57 | 96% | 8.8° |
| 2025-04-11 Fri | 21 | 0 | 0 | — | 50.2° 00:30 | 7.51 | 99% | 7.5° |
| 2025-04-12 Sat | 25 | 13 | 3 | 00:00–01:00 (marginal, 1.0 h) | 50.2° 00:25 | 7.45 | 100% | 17.9° |
| 2025-04-13 Sun | 32 | 48 | 15 | 21:40–00:00 (marginal, 2.33 h) | 50.2° 00:20 | 7.39 | 99% | 29.4° |
| 2025-04-14 Mon | 76 | 6 | 4 | — | 50.2° 00:20 | 7.34 | 97% | 41.0° |
| 2025-04-15 Tue | 91 | 65 | 59 | 22:00–23:00 (good, 1.0 h) | 50.2° 00:15 | 7.28 | 92% | 52.8° |
| 2025-04-16 Wed | 93 | 94 | 87 | 21:45–02:00 (good, 4.25 h) | 50.2° 00:10 | 7.22 | 87% | 64.6° |
| 2025-04-17 Thu | 93 | 1 | 1 | — | 50.2° 00:05 | 7.16 | 79% | 76.6° |
| 2025-04-18 Fri | 93 | 18 | 17 | 21:50–22:00 (good, 0.17 h) | 50.2° 00:05 | 7.11 | 71% | 88.7° |
| 2025-04-19 Sat | 93 | 81 | 75 | 21:50–03:00 (good, 5.17 h) | 50.2° 00:00 | 7.05 | 62% | 101.1° |
| 2025-04-20 Sun | 93 | 74 | 69 | 23:00–02:00 (good, 3.0 h) | 50.2° 23:55 | 6.99 | 52% | 113.8° |
| 2025-04-21 Mon | 93 | 47 | 44 | 03:00–03:40 (good, 0.67 h) | 50.2° 23:50 | 6.93 | 41% | 126.8° |
| 2025-04-22 Tue | 93 | 30 | 28 | 00:00–01:00 (good, 1.0 h) | 50.2° 23:45 | 6.87 | 30% | 140.2° |
| 2025-04-23 Wed | 93 | 35 | 33 | 03:00–03:25 (good, 0.42 h) | 50.2° 23:45 | 6.81 | 21% | 154.0° |
| 2025-04-24 Thu | 93 | 75 | 70 | 23:00–03:20 (good, 4.33 h) | 50.2° 23:40 | 6.76 | 12% | 167.7° |
| 2025-04-25 Fri | 93 | 99 | 92 | 22:00–03:25 (good, 5.42 h) | 50.2° 23:35 | 6.7 | 5% | 173.2° |
| 2025-04-26 Sat | 93 | 24 | 22 | 02:00–03:35 (marginal, 1.58 h) | 50.2° 23:30 | 6.64 | 1% | 160.2° |
| 2025-04-27 Sun | 93 | 0 | 0 | — | 50.2° 23:25 | 6.58 | 0% | 145.3° |
| 2025-04-28 Mon | 93 | 100 | 93 | 22:05–03:15 (good, 5.17 h) | 50.2° 23:25 | 6.52 | 2% | 130.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-03-30&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.