← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-05-16 Wed | 83 | — | unknown | 00:55–04:05 (good, 3.17 h) | 71.1° 05:45 | 5.52 | 86% | 112.0° |
| 2046-05-17 Thu | 68 | — | unknown | 01:00–04:05 (good, 3.08 h) | 71.1° 05:40 | 5.46 | 93% | 101.6° |
| 2046-05-18 Fri | 58 | — | unknown | 01:10–04:00 (good, 2.83 h) | 71.1° 05:35 | 5.41 | 98% | 90.9° |
| 2046-05-19 Sat | 49 | — | unknown | 01:50–04:00 (good, 2.17 h) | 71.1° 05:30 | 5.36 | 100% | 80.3° |
| 2046-05-20 Sun | 43 | — | unknown | 02:30–04:00 (good, 1.5 h) | 71.1° 05:30 | 5.31 | 99% | 70.2° |
| 2046-05-21 Mon | 39 | — | unknown | 03:00–04:00 (good, 1.0 h) | 71.1° 05:25 | 5.26 | 96% | 60.9° |
| 2046-05-22 Tue | 38 | — | unknown | 03:25–03:55 (good, 0.5 h) | 71.1° 05:20 | 5.21 | 91% | 52.8° |
| 2046-05-23 Wed | 41 | — | unknown | 03:00–03:55 (good, 0.92 h) | 71.1° 05:15 | 5.17 | 84% | 46.6° |
| 2046-05-24 Thu | 60 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.12 | 76% | 42.8° |
| 2046-05-25 Fri | 69 | — | unknown | 00:05–03:55 (good, 3.83 h) | 71.1° 05:10 | 5.07 | 67% | 41.8° |
| 2046-05-26 Sat | 78 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.03 | 57% | 43.6° |
| 2046-05-27 Sun | 86 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:00 | 4.99 | 48% | 47.9° |
| 2046-05-28 Mon | 94 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 04:55 | 4.94 | 39% | 53.9° |
| 2046-05-29 Tue | 98 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:55 | 4.9 | 30% | 61.1° |
| 2046-05-30 Wed | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:50 | 4.86 | 21% | 69.2° |
| 2046-05-31 Thu | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.83 | 14% | 77.9° |
| 2046-06-01 Fri | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:40 | 4.79 | 8% | 87.0° |
| 2046-06-02 Sat | 100 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:35 | 4.75 | 3% | 96.4° |
| 2046-06-03 Sun | 100 | — | unknown | 23:30–03:45 (good, 4.25 h) | 71.1° 04:35 | 4.72 | 1% | 105.9° |
| 2046-06-04 Mon | 100 | — | unknown | 23:30–03:45 (good, 4.25 h) | 71.1° 04:30 | 4.69 | 0% | 115.1° |
| 2046-06-05 Tue | 100 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:25 | 4.66 | 2% | 123.7° |
| 2046-06-06 Wed | 100 | — | unknown | 23:20–03:40 (good, 4.33 h) | 71.1° 04:20 | 4.63 | 6% | 131.1° |
| 2046-06-07 Thu | 100 | — | unknown | 23:15–03:40 (good, 4.42 h) | 71.1° 04:15 | 4.6 | 12% | 136.3° |
| 2046-06-08 Fri | 100 | — | unknown | 23:15–03:40 (good, 4.42 h) | 71.1° 04:15 | 4.58 | 21% | 138.3° |
| 2046-06-09 Sat | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:10 | 4.55 | 31% | 136.6° |
| 2046-06-10 Sun | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:05 | 4.53 | 42% | 131.5° |
| 2046-06-11 Mon | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:00 | 4.51 | 53% | 123.9° |
| 2046-06-12 Tue | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:00 | 4.49 | 65% | 114.7° |
| 2046-06-13 Wed | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 03:55 | 4.48 | 75% | 104.7° |
| 2046-06-14 Thu | 100 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 03:50 | 4.46 | 84% | 94.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-05-16&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.