← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-06-19 Wed | 23 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.7° 08:10 | 4.42 | 64% | 56.8° |
| 2041-06-20 Thu | 27 | — | unknown | 02:25–03:40 (good, 1.25 h) | 89.6° 08:05 | 4.42 | 52% | 47.0° |
| 2041-06-21 Fri | 31 | — | unknown | 02:15–03:40 (good, 1.42 h) | 89.6° 08:05 | 4.42 | 41% | 39.4° |
| 2041-06-22 Sat | 39 | — | unknown | 01:55–03:40 (good, 1.75 h) | 89.7° 08:00 | 4.43 | 30% | 35.2° |
| 2041-06-23 Sun | 44 | — | unknown | 01:50–03:40 (good, 1.83 h) | 89.8° 07:55 | 4.43 | 21% | 35.3° |
| 2041-06-24 Mon | 49 | — | unknown | 01:45–03:40 (good, 1.92 h) | 89.7° 07:50 | 4.44 | 13% | 39.7° |
| 2041-06-25 Tue | 53 | — | unknown | 01:45–03:40 (good, 1.92 h) | 89.5° 07:45 | 4.45 | 7% | 46.9° |
| 2041-06-26 Wed | 55 | — | unknown | 01:40–03:40 (good, 2.0 h) | 89.6° 07:45 | 4.46 | 2% | 55.6° |
| 2041-06-27 Thu | 56 | — | unknown | 01:35–03:40 (good, 2.08 h) | 89.8° 07:40 | 4.47 | 0% | 65.2° |
| 2041-06-28 Fri | 58 | — | unknown | 01:30–03:40 (good, 2.17 h) | 89.8° 07:35 | 4.49 | 0% | 75.1° |
| 2041-06-29 Sat | 60 | — | unknown | 01:30–03:40 (good, 2.17 h) | 89.6° 07:30 | 4.5 | 2% | 85.2° |
| 2041-06-30 Sun | 63 | — | unknown | 01:25–03:45 (good, 2.33 h) | 89.5° 07:30 | 4.52 | 6% | 95.1° |
| 2041-07-01 Mon | 65 | — | unknown | 01:20–03:45 (good, 2.42 h) | 89.7° 07:25 | 4.55 | 11% | 104.9° |
| 2041-07-02 Tue | 66 | — | unknown | 01:15–03:45 (good, 2.5 h) | 89.8° 07:20 | 4.57 | 18% | 114.4° |
| 2041-07-03 Wed | 68 | — | unknown | 01:10–03:45 (good, 2.58 h) | 89.7° 07:15 | 4.59 | 26% | 123.4° |
| 2041-07-04 Thu | 71 | — | unknown | 01:10–03:45 (good, 2.58 h) | 89.6° 07:10 | 4.62 | 34% | 131.6° |
| 2041-07-05 Fri | 74 | — | unknown | 01:05–03:50 (good, 2.75 h) | 89.6° 07:10 | 4.65 | 44% | 138.6° |
| 2041-07-06 Sat | 76 | — | unknown | 01:05–03:50 (good, 2.75 h) | 89.7° 07:05 | 4.68 | 53% | 143.6° |
| 2041-07-07 Sun | 77 | — | unknown | 01:00–03:50 (good, 2.83 h) | 89.8° 07:00 | 4.71 | 63% | 145.4° |
| 2041-07-08 Mon | 78 | — | unknown | 01:00–03:50 (good, 2.83 h) | 89.7° 06:55 | 4.74 | 73% | 143.4° |
| 2041-07-09 Tue | 79 | — | unknown | 00:55–03:50 (good, 2.92 h) | 89.5° 06:50 | 4.78 | 82% | 137.7° |
| 2041-07-10 Wed | 82 | — | unknown | 00:55–03:55 (good, 3.0 h) | 89.6° 06:50 | 4.81 | 89% | 129.4° |
| 2041-07-11 Thu | 82 | — | unknown | 00:50–03:55 (good, 3.08 h) | 89.8° 06:45 | 4.85 | 95% | 119.2° |
| 2041-07-12 Fri | 66 | — | unknown | 00:55–03:55 (good, 3.0 h) | 89.8° 06:40 | 4.89 | 99% | 107.9° |
| 2041-07-13 Sat | 57 | — | unknown | 01:00–03:55 (good, 2.92 h) | 89.7° 06:35 | 4.93 | 100% | 95.9° |
| 2041-07-14 Sun | 49 | — | unknown | 01:35–04:00 (good, 2.42 h) | 89.5° 06:35 | 4.97 | 98% | 83.7° |
| 2041-07-15 Mon | 43 | — | unknown | 02:40–04:00 (good, 1.33 h) | 89.7° 06:30 | 5.01 | 93% | 71.5° |
| 2041-07-16 Tue | 38 | — | unknown | 03:35–04:00 (good, 0.42 h) | 89.8° 06:25 | 5.06 | 86% | 59.9° |
| 2041-07-17 Wed | 39 | — | unknown | 23:45–04:05 (marginal, 4.33 h) | 89.8° 06:20 | 5.1 | 77% | 49.4° |
| 2041-07-18 Thu | 44 | — | unknown | 01:55–04:05 (good, 2.17 h) | 89.6° 06:15 | 5.15 | 66% | 40.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-06-19&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.