← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-05-12 Mon | 74 | — | unknown | 01:00–04:10 (good, 3.17 h) | 71.1° 06:00 | 5.73 | 49% | 48.8° |
| 2042-05-13 Tue | 83 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 05:55 | 5.68 | 37% | 53.2° |
| 2042-05-14 Wed | 87 | — | unknown | 00:50–04:10 (good, 3.33 h) | 71.1° 05:50 | 5.62 | 27% | 59.9° |
| 2042-05-15 Thu | 90 | — | unknown | 00:45–04:05 (good, 3.33 h) | 71.1° 05:50 | 5.57 | 17% | 68.2° |
| 2042-05-16 Fri | 92 | — | unknown | 00:40–04:05 (good, 3.42 h) | 71.1° 05:45 | 5.52 | 9% | 77.6° |
| 2042-05-17 Sat | 94 | — | unknown | 00:40–04:05 (good, 3.42 h) | 71.1° 05:40 | 5.47 | 3% | 87.5° |
| 2042-05-18 Sun | 94 | — | unknown | 00:35–04:00 (good, 3.42 h) | 71.1° 05:35 | 5.41 | 0% | 97.5° |
| 2042-05-19 Mon | 94 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:30 | 5.36 | 0% | 107.1° |
| 2042-05-20 Tue | 96 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:30 | 5.31 | 3% | 115.9° |
| 2042-05-21 Wed | 98 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.26 | 8% | 123.3° |
| 2042-05-22 Thu | 99 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:20 | 5.22 | 15% | 128.8° |
| 2042-05-23 Fri | 99 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:15 | 5.17 | 23% | 132.0° |
| 2042-05-24 Sat | 100 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:10 | 5.12 | 32% | 132.7° |
| 2042-05-25 Sun | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.08 | 42% | 130.9° |
| 2042-05-26 Mon | 100 | — | unknown | 00:10–03:50 (good, 3.67 h) | 71.1° 05:05 | 5.03 | 52% | 127.0° |
| 2042-05-27 Tue | 100 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:00 | 4.99 | 61% | 121.6° |
| 2042-05-28 Wed | 99 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 04:55 | 4.95 | 70% | 115.1° |
| 2042-05-29 Thu | 96 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 04:55 | 4.91 | 78% | 107.8° |
| 2042-05-30 Fri | 80 | — | unknown | 00:10–03:45 (good, 3.58 h) | 71.1° 04:50 | 4.87 | 86% | 100.0° |
| 2042-05-31 Sat | 72 | — | unknown | 00:10–03:45 (good, 3.58 h) | 71.1° 04:45 | 4.83 | 92% | 91.9° |
| 2042-06-01 Sun | 64 | — | unknown | 00:45–03:45 (good, 3.0 h) | 71.1° 04:40 | 4.79 | 96% | 83.6° |
| 2042-06-02 Mon | 56 | — | unknown | 01:20–03:45 (good, 2.42 h) | 71.1° 04:35 | 4.76 | 99% | 75.4° |
| 2042-06-03 Tue | 50 | — | unknown | 01:50–03:45 (good, 1.92 h) | 71.1° 04:35 | 4.72 | 100% | 67.4° |
| 2042-06-04 Wed | 46 | — | unknown | 02:20–03:45 (good, 1.42 h) | 71.1° 04:30 | 4.69 | 99% | 60.0° |
| 2042-06-05 Thu | 44 | — | unknown | 02:30–03:00 (good, 0.5 h) | 71.1° 04:25 | 4.66 | 95% | 53.8° |
| 2042-06-06 Fri | 63 | — | unknown | 01:45–03:20 (good, 1.58 h) | 71.1° 04:20 | 4.63 | 90% | 49.3° |
| 2042-06-07 Sat | 75 | — | unknown | 23:15–03:40 (good, 4.42 h) | 71.1° 04:15 | 4.6 | 82% | 47.2° |
| 2042-06-08 Sun | 87 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:15 | 4.58 | 73% | 48.1° |
| 2042-06-09 Mon | 95 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 04:10 | 4.55 | 62% | 51.8° |
| 2042-06-10 Tue | 98 | — | unknown | 23:05–03:40 (good, 4.58 h) | 71.1° 04:05 | 4.53 | 51% | 57.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-05-12&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.