← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-06-09 Sun | 10 | — | unknown | 23:05–00:40 (marginal, 1.58 h) | 50.1° 20:40 | 4.55 | 78% | 17.7° |
| 2041-06-10 Mon | 8 | — | unknown | 23:05–00:25 (marginal, 1.33 h) | 50.1° 20:35 | 4.53 | 86% | 30.4° |
| 2041-06-11 Tue | 9 | — | unknown | 23:10–00:25 (marginal, 1.25 h) | 50.1° 20:30 | 4.51 | 92% | 43.5° |
| 2041-06-12 Wed | 11 | — | unknown | 23:10–00:30 (marginal, 1.33 h) | 50.1° 20:25 | 4.49 | 97% | 57.0° |
| 2041-06-13 Thu | 14 | — | unknown | 23:10–00:35 (marginal, 1.42 h) | 50.1° 20:25 | 4.47 | 100% | 70.8° |
| 2041-06-14 Fri | 17 | — | unknown | 23:10–23:40 (good, 0.5 h) | 50.1° 20:20 | 4.46 | 100% | 85.0° |
| 2041-06-15 Sat | 21 | — | unknown | 23:10–23:50 (good, 0.67 h) | 50.1° 20:15 | 4.45 | 97% | 99.4° |
| 2041-06-16 Sun | 26 | — | unknown | 23:10–23:55 (good, 0.75 h) | 50.1° 20:10 | 4.44 | 92% | 113.9° |
| 2041-06-17 Mon | 26 | — | unknown | 23:10–00:00 (good, 0.83 h) | 50.1° 20:05 | 4.43 | 84% | 128.4° |
| 2041-06-18 Tue | 25 | — | unknown | 23:10–23:55 (good, 0.75 h) | 50.1° 20:05 | 4.43 | 74% | 142.9° |
| 2041-06-19 Wed | 24 | — | unknown | 23:10–23:50 (good, 0.67 h) | 50.1° 20:00 | 4.42 | 64% | 157.3° |
| 2041-06-20 Thu | 22 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.1° 19:55 | 4.42 | 52% | 171.4° |
| 2041-06-21 Fri | 20 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.1° 19:50 | 4.42 | 41% | 174.3° |
| 2041-06-22 Sat | 18 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.1° 19:45 | 4.43 | 30% | 160.7° |
| 2041-06-23 Sun | 17 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.1° 19:45 | 4.43 | 21% | 147.1° |
| 2041-06-24 Mon | 15 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.1° 19:40 | 4.44 | 13% | 133.8° |
| 2041-06-25 Tue | 14 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.1° 19:35 | 4.45 | 7% | 120.7° |
| 2041-06-26 Wed | 12 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.1° 19:30 | 4.46 | 2% | 107.8° |
| 2041-06-27 Thu | 11 | — | unknown | 23:15–23:20 (good, 0.08 h) | 50.1° 19:30 | 4.47 | 0% | 95.1° |
| 2041-06-28 Fri | 11 | — | unknown | 23:10–23:15 (good, 0.08 h) | 50.1° 19:25 | 4.49 | 0% | 82.6° |
| 2041-06-29 Sat | 10 | — | unknown | 22:20–23:40 (marginal, 1.33 h) | 50.1° 19:20 | 4.5 | 2% | 70.4° |
| 2041-06-30 Sun | 9 | — | unknown | 22:20–23:35 (marginal, 1.25 h) | 50.1° 19:15 | 4.52 | 6% | 58.3° |
| 2041-07-01 Mon | 7 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.1° 19:10 | 4.55 | 11% | 46.3° |
| 2041-07-02 Tue | 6 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.1° 19:10 | 4.57 | 18% | 34.4° |
| 2041-07-03 Wed | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 19:05 | 4.59 | 26% | 22.6° |
| 2041-07-04 Thu | 3 | — | unknown | 23:10–23:20 (marginal, 0.17 h) | 50.1° 19:00 | 4.62 | 34% | 10.9° |
| 2041-07-05 Fri | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.1° 18:55 | 4.65 | 44% | 2.1° |
| 2041-07-06 Sat | 2 | — | unknown | — | 50.1° 18:50 | 4.68 | 53% | 13.4° |
| 2041-07-07 Sun | 2 | — | unknown | — | 50.1° 18:50 | 4.71 | 63% | 25.8° |
| 2041-07-08 Mon | 1 | — | unknown | — | 50.1° 18:45 | 4.74 | 73% | 38.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-06-09&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.