← 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 | 6 | — | unknown | 03:05–03:40 (marginal, 0.58 h) | 79.2° 09:00 | 4.42 | 64% | 54.8° |
| 2041-06-20 Thu | 7 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.2° 09:00 | 4.42 | 52% | 42.3° |
| 2041-06-21 Fri | 8 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.2° 08:55 | 4.42 | 41% | 31.0° |
| 2041-06-22 Sat | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 08:50 | 4.43 | 30% | 22.6° |
| 2041-06-23 Sun | 14 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:45 | 4.43 | 21% | 20.6° |
| 2041-06-24 Mon | 17 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.2° 08:40 | 4.44 | 13% | 26.1° |
| 2041-06-25 Tue | 21 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.2° 08:40 | 4.45 | 7% | 35.6° |
| 2041-06-26 Wed | 22 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.2° 08:35 | 4.46 | 2% | 46.5° |
| 2041-06-27 Thu | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.2° 08:30 | 4.47 | 0% | 57.9° |
| 2041-06-28 Fri | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.2° 08:25 | 4.49 | 0% | 69.4° |
| 2041-06-29 Sat | 26 | — | unknown | 02:55–03:40 (good, 0.75 h) | 79.2° 08:25 | 4.5 | 2% | 80.9° |
| 2041-06-30 Sun | 29 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.2° 08:20 | 4.52 | 6% | 92.2° |
| 2041-07-01 Mon | 30 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.2° 08:15 | 4.55 | 11% | 103.4° |
| 2041-07-02 Tue | 31 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.2° 08:10 | 4.57 | 18% | 114.5° |
| 2041-07-03 Wed | 33 | — | unknown | 02:40–03:45 (good, 1.08 h) | 79.2° 08:05 | 4.59 | 26% | 125.3° |
| 2041-07-04 Thu | 35 | — | unknown | 02:35–03:45 (good, 1.17 h) | 79.2° 08:05 | 4.62 | 34% | 135.9° |
| 2041-07-05 Fri | 37 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.2° 08:00 | 4.65 | 44% | 145.8° |
| 2041-07-06 Sat | 39 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.2° 07:55 | 4.68 | 53% | 154.4° |
| 2041-07-07 Sun | 40 | — | unknown | 02:25–03:50 (good, 1.42 h) | 79.2° 07:50 | 4.71 | 63% | 159.5° |
| 2041-07-08 Mon | 42 | — | unknown | 02:20–03:50 (good, 1.5 h) | 79.2° 07:45 | 4.74 | 73% | 158.0° |
| 2041-07-09 Tue | 43 | — | unknown | 02:20–03:50 (good, 1.5 h) | 79.2° 07:45 | 4.78 | 82% | 150.4° |
| 2041-07-10 Wed | 45 | — | unknown | 02:20–03:55 (good, 1.58 h) | 79.2° 07:40 | 4.81 | 89% | 139.6° |
| 2041-07-11 Thu | 45 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.2° 07:35 | 4.85 | 95% | 127.3° |
| 2041-07-12 Fri | 40 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.2° 07:30 | 4.89 | 99% | 114.1° |
| 2041-07-13 Sat | 34 | — | unknown | 02:20–03:55 (good, 1.58 h) | 79.2° 07:30 | 4.93 | 100% | 100.4° |
| 2041-07-14 Sun | 29 | — | unknown | 02:50–04:00 (good, 1.17 h) | 79.2° 07:25 | 4.97 | 98% | 86.4° |
| 2041-07-15 Mon | 25 | — | unknown | 03:55–04:00 (good, 0.08 h) | 79.2° 07:20 | 5.01 | 93% | 72.4° |
| 2041-07-16 Tue | 22 | — | unknown | 01:30–04:00 (marginal, 2.5 h) | 79.2° 07:15 | 5.06 | 86% | 58.6° |
| 2041-07-17 Wed | 21 | — | unknown | 01:25–04:05 (marginal, 2.67 h) | 79.2° 07:10 | 5.1 | 77% | 45.5° |
| 2041-07-18 Thu | 23 | — | unknown | 01:15–04:05 (marginal, 2.83 h) | 79.2° 07:10 | 5.15 | 66% | 33.4° |
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.