← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-03-11 Tue | 35 | 0 | 0 | — | 50.2° 01:30 | 9.16 | 95% | 40.7° |
| 2025-03-12 Wed | 23 | 0 | 0 | — | 50.2° 01:30 | 9.11 | 98% | 28.5° |
| 2025-03-13 Thu | 22 | 52 | 11 | 03:30–05:00 (marginal, 1.5 h) | 50.2° 01:25 | 9.06 | 100% | 16.7° |
| 2025-03-14 Fri | 22 | 0 | 0 | — | 50.2° 01:20 | 9.01 | 100% | 6.6° |
| 2025-03-15 Sat | 26 | 32 | 8 | 04:00–04:55 (marginal, 0.92 h) | 50.2° 01:15 | 8.96 | 98% | 10.0° |
| 2025-03-16 Sun | 36 | 96 | 34 | 21:10–02:00 (marginal, 4.83 h) | 50.2° 01:10 | 8.91 | 94% | 21.0° |
| 2025-03-17 Mon | 80 | 43 | 35 | 01:00–04:00 (marginal, 3.0 h) | 50.2° 01:10 | 8.86 | 88% | 32.5° |
| 2025-03-18 Tue | 88 | 0 | 0 | — | 50.2° 01:05 | 8.81 | 82% | 44.2° |
| 2025-03-19 Wed | 92 | 100 | 92 | 21:15–03:20 (good, 6.08 h) | 50.2° 01:00 | 8.76 | 74% | 56.0° |
| 2025-03-20 Thu | 93 | 100 | 93 | 21:10–04:25 (good, 7.25 h) | 50.2° 00:55 | 8.71 | 65% | 67.9° |
| 2025-03-21 Fri | 93 | 67 | 63 | 21:05–00:00 (good, 2.92 h) | 50.2° 00:55 | 8.66 | 55% | 80.0° |
| 2025-03-22 Sat | 93 | 0 | 0 | — | 50.2° 00:50 | 8.61 | 45% | 92.4° |
| 2025-03-23 Sun | 93 | 0 | 0 | — | 50.2° 00:45 | 8.55 | 35% | 105.1° |
| 2025-03-24 Mon | 93 | 0 | 0 | — | 50.2° 00:40 | 8.5 | 26% | 118.2° |
| 2025-03-25 Tue | 93 | 0 | 0 | — | 50.2° 00:35 | 8.45 | 17% | 131.8° |
| 2025-03-26 Wed | 93 | 5 | 4 | 20:50–21:00 (marginal, 0.17 h) | 50.2° 00:35 | 8.39 | 9% | 145.8° |
| 2025-03-27 Thu | 93 | 0 | 0 | — | 50.2° 00:30 | 8.34 | 3% | 160.1° |
| 2025-03-28 Fri | 93 | 0 | 0 | — | 50.2° 00:25 | 8.29 | 0% | 173.0° |
| 2025-03-29 Sat | 93 | 0 | 0 | — | 50.2° 00:20 | 8.23 | 0% | 167.8° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-03-11&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.