← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-05-05 Sat | 2 | — | unknown | — | 89.7° 11:10 | 6.12 | 0% | 31.8° |
| 2046-05-06 Sun | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.8° 11:05 | 6.07 | 1% | 38.8° |
| 2046-05-07 Mon | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.7° 11:00 | 6.01 | 4% | 47.9° |
| 2046-05-08 Tue | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.6° 10:55 | 5.95 | 8% | 58.3° |
| 2046-05-09 Wed | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.6° 10:55 | 5.9 | 15% | 69.5° |
| 2046-05-10 Thu | 3 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.8° 10:50 | 5.84 | 24% | 81.2° |
| 2046-05-11 Fri | 3 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.8° 10:45 | 5.79 | 33% | 93.2° |
| 2046-05-12 Sat | 3 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.7° 10:40 | 5.73 | 44% | 105.3° |
| 2046-05-13 Sun | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.5° 10:35 | 5.68 | 56% | 117.4° |
| 2046-05-14 Mon | 5 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.7° 10:35 | 5.62 | 67% | 129.1° |
| 2046-05-15 Tue | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.8° 10:30 | 5.57 | 77% | 139.8° |
| 2046-05-16 Wed | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.52 | 86% | 148.1° |
| 2046-05-17 Thu | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.6° 10:20 | 5.46 | 93% | 151.6° |
| 2046-05-18 Fri | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.6° 10:20 | 5.41 | 98% | 148.7° |
| 2046-05-19 Sat | 6 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.7° 10:15 | 5.36 | 100% | 141.0° |
| 2046-05-20 Sun | 6 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.8° 10:10 | 5.31 | 99% | 130.8° |
| 2046-05-21 Mon | 7 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.7° 10:05 | 5.26 | 96% | 119.7° |
| 2046-05-22 Tue | 6 | — | unknown | 03:25–03:55 (marginal, 0.5 h) | 89.6° 10:00 | 5.21 | 91% | 108.3° |
| 2046-05-23 Wed | 7 | — | unknown | 03:20–03:55 (marginal, 0.58 h) | 89.6° 10:00 | 5.17 | 84% | 97.0° |
| 2046-05-24 Thu | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.8° 09:55 | 5.12 | 76% | 85.9° |
| 2046-05-25 Fri | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.8° 09:50 | 5.07 | 67% | 75.1° |
| 2046-05-26 Sat | 7 | — | unknown | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:45 | 5.03 | 57% | 64.7° |
| 2046-05-27 Sun | 9 | — | unknown | 03:05–03:50 (marginal, 0.75 h) | 89.5° 09:40 | 4.99 | 48% | 54.8° |
| 2046-05-28 Mon | 10 | — | unknown | 03:00–03:50 (marginal, 0.83 h) | 89.7° 09:40 | 4.94 | 39% | 45.5° |
| 2046-05-29 Tue | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.8° 09:35 | 4.9 | 30% | 37.3° |
| 2046-05-30 Wed | 13 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.8° 09:30 | 4.86 | 21% | 31.1° |
| 2046-05-31 Thu | 16 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:25 | 4.83 | 14% | 28.3° |
| 2046-06-01 Fri | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.5° 09:25 | 4.79 | 8% | 30.2° |
| 2046-06-02 Sat | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.7° 09:20 | 4.75 | 3% | 36.2° |
| 2046-06-03 Sun | 22 | — | unknown | 03:10–03:45 (good, 0.58 h) | 89.8° 09:15 | 4.72 | 1% | 45.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-05-05&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.