← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-06-25 Tue | 0 | — | unknown | — | 72.5° 10:50 | 4.45 | 7% | 5.6° |
| 2041-06-26 Wed | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 2% | 18.0° |
| 2041-06-27 Thu | 0 | — | unknown | — | 72.5° 10:45 | 4.47 | 0% | 30.6° |
| 2041-06-28 Fri | 0 | — | unknown | — | 72.5° 10:40 | 4.49 | 0% | 43.0° |
| 2041-06-29 Sat | 0 | — | unknown | — | 72.5° 10:35 | 4.5 | 2% | 55.3° |
| 2041-06-30 Sun | 0 | — | unknown | — | 72.5° 10:30 | 4.52 | 6% | 67.4° |
| 2041-07-01 Mon | 0 | — | unknown | — | 72.5° 10:25 | 4.55 | 11% | 79.3° |
| 2041-07-02 Tue | 0 | — | unknown | — | 72.5° 10:25 | 4.57 | 18% | 91.2° |
| 2041-07-03 Wed | 0 | — | unknown | — | 72.5° 10:20 | 4.59 | 26% | 103.0° |
| 2041-07-04 Thu | 0 | — | unknown | — | 72.5° 10:15 | 4.62 | 34% | 114.8° |
| 2041-07-05 Fri | 0 | — | unknown | — | 72.5° 10:10 | 4.65 | 44% | 126.8° |
| 2041-07-06 Sat | 0 | — | unknown | — | 72.5° 10:05 | 4.68 | 53% | 138.9° |
| 2041-07-07 Sun | 1 | — | unknown | — | 72.5° 10:05 | 4.71 | 63% | 151.2° |
| 2041-07-08 Mon | 1 | — | unknown | — | 72.5° 10:00 | 4.74 | 73% | 163.8° |
| 2041-07-09 Tue | 1 | — | unknown | — | 72.5° 09:55 | 4.78 | 82% | 176.1° |
| 2041-07-10 Wed | 1 | — | unknown | — | 72.5° 09:50 | 4.81 | 89% | 168.9° |
| 2041-07-11 Thu | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:50 | 4.85 | 95% | 155.1° |
| 2041-07-12 Fri | 2 | — | unknown | — | 72.5° 09:45 | 4.89 | 99% | 140.7° |
| 2041-07-13 Sat | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:40 | 4.93 | 100% | 126.1° |
| 2041-07-14 Sun | 2 | — | unknown | — | 72.5° 09:35 | 4.97 | 98% | 111.2° |
| 2041-07-15 Mon | 2 | — | unknown | — | 72.5° 09:30 | 5.01 | 93% | 96.2° |
| 2041-07-16 Tue | 2 | — | unknown | — | 72.5° 09:30 | 5.06 | 86% | 81.4° |
| 2041-07-17 Wed | 2 | — | unknown | 04:00–04:05 (marginal, 0.08 h) | 72.5° 09:25 | 5.1 | 77% | 66.7° |
| 2041-07-18 Thu | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.5° 09:20 | 5.15 | 66% | 52.3° |
| 2041-07-19 Fri | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:15 | 5.19 | 55% | 38.3° |
| 2041-07-20 Sat | 4 | — | unknown | 03:40–04:05 (marginal, 0.42 h) | 72.5° 09:10 | 5.24 | 44% | 24.7° |
| 2041-07-21 Sun | 7 | — | unknown | 03:35–04:10 (marginal, 0.58 h) | 72.5° 09:10 | 5.29 | 34% | 11.5° |
| 2041-07-22 Mon | 9 | — | unknown | 03:30–04:55 (marginal, 1.42 h) | 72.5° 09:05 | 5.34 | 24% | 3.2° |
| 2041-07-23 Tue | 12 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:00 | 5.39 | 16% | 15.0° |
| 2041-07-24 Wed | 16 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 08:55 | 5.44 | 9% | 27.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-06-25&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.