← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-05-04 Mon | 76 | — | unknown | 01:30–04:25 (good, 2.92 h) | 71.1° 06:30 | 6.2 | 24% | 55.6° |
| 2043-05-05 Tue | 79 | — | unknown | 01:25–04:25 (good, 3.0 h) | 71.1° 06:30 | 6.14 | 15% | 63.2° |
| 2043-05-06 Wed | 79 | — | unknown | 01:25–04:20 (good, 2.92 h) | 71.1° 06:25 | 6.08 | 7% | 72.2° |
| 2043-05-07 Thu | 82 | — | unknown | 01:20–04:20 (good, 3.0 h) | 71.1° 06:20 | 6.03 | 2% | 82.2° |
| 2043-05-08 Fri | 82 | — | unknown | 01:15–04:20 (good, 3.08 h) | 71.1° 06:15 | 5.97 | 0% | 92.7° |
| 2043-05-09 Sat | 83 | — | unknown | 01:10–04:15 (good, 3.08 h) | 71.1° 06:10 | 5.91 | 1% | 103.0° |
| 2043-05-10 Sun | 85 | — | unknown | 01:05–04:15 (good, 3.17 h) | 71.1° 06:10 | 5.86 | 5% | 112.8° |
| 2043-05-11 Mon | 86 | — | unknown | 01:05–04:15 (good, 3.17 h) | 71.1° 06:05 | 5.8 | 12% | 121.3° |
| 2043-05-12 Tue | 87 | — | unknown | 01:00–04:10 (good, 3.17 h) | 71.1° 06:00 | 5.75 | 20% | 128.0° |
| 2043-05-13 Wed | 88 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 05:55 | 5.69 | 30% | 132.2° |
| 2043-05-14 Thu | 89 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 05:55 | 5.64 | 40% | 133.5° |
| 2043-05-15 Fri | 88 | — | unknown | 00:50–04:05 (good, 3.25 h) | 71.1° 05:50 | 5.58 | 50% | 131.9° |
| 2043-05-16 Sat | 88 | — | unknown | 00:50–04:05 (good, 3.25 h) | 71.1° 05:45 | 5.53 | 61% | 127.9° |
| 2043-05-17 Sun | 89 | — | unknown | 00:45–04:05 (good, 3.33 h) | 71.1° 05:40 | 5.48 | 70% | 122.3° |
| 2043-05-18 Mon | 87 | — | unknown | 00:45–04:05 (good, 3.33 h) | 71.1° 05:35 | 5.43 | 79% | 115.5° |
| 2043-05-19 Tue | 74 | — | unknown | 00:45–04:00 (good, 3.25 h) | 71.1° 05:35 | 5.38 | 86% | 108.0° |
| 2043-05-20 Wed | 68 | — | unknown | 00:50–04:00 (good, 3.17 h) | 71.1° 05:30 | 5.33 | 92% | 100.1° |
| 2043-05-21 Thu | 61 | — | unknown | 00:55–04:00 (good, 3.08 h) | 71.1° 05:25 | 5.28 | 96% | 92.0° |
| 2043-05-22 Fri | 54 | — | unknown | 01:25–03:55 (good, 2.5 h) | 71.1° 05:20 | 5.23 | 99% | 83.9° |
| 2043-05-23 Sat | 48 | — | unknown | 01:55–03:55 (good, 2.0 h) | 71.1° 05:15 | 5.18 | 100% | 75.9° |
| 2043-05-24 Sun | 44 | — | unknown | 02:20–03:55 (good, 1.58 h) | 71.1° 05:15 | 5.13 | 99% | 68.2° |
| 2043-05-25 Mon | 42 | — | unknown | 02:40–03:55 (good, 1.25 h) | 71.1° 05:10 | 5.09 | 96% | 61.0° |
| 2043-05-26 Tue | 41 | — | unknown | 02:40–03:50 (good, 1.17 h) | 71.1° 05:05 | 5.04 | 92% | 54.8° |
| 2043-05-27 Wed | 55 | — | unknown | 01:50–03:50 (good, 2.0 h) | 71.1° 05:00 | 5.0 | 86% | 49.9° |
| 2043-05-28 Thu | 67 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 05:00 | 4.96 | 78% | 47.0° |
| 2043-05-29 Fri | 78 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:55 | 4.92 | 69% | 46.6° |
| 2043-05-30 Sat | 87 | — | unknown | 23:50–03:45 (good, 3.92 h) | 71.1° 04:50 | 4.88 | 59% | 48.8° |
| 2043-05-31 Sun | 96 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.84 | 49% | 53.5° |
| 2043-06-01 Mon | 99 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:40 | 4.8 | 38% | 60.2° |
| 2043-06-02 Tue | 100 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:40 | 4.76 | 27% | 68.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-05-04&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.