← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-05-28 Sun | 1 | — | unknown | — | 79.2° 10:30 | 4.93 | 96% | 160.8° |
| 2045-05-29 Mon | 0 | — | unknown | — | 79.2° 10:25 | 4.89 | 99% | 150.8° |
| 2045-05-30 Tue | 1 | — | unknown | — | 79.2° 10:20 | 4.86 | 100% | 139.5° |
| 2045-05-31 Wed | 1 | — | unknown | — | 79.2° 10:15 | 4.82 | 98% | 127.8° |
| 2045-06-01 Thu | 1 | — | unknown | — | 79.2° 10:15 | 4.78 | 95% | 116.0° |
| 2045-06-02 Fri | 1 | — | unknown | — | 79.2° 10:10 | 4.75 | 90% | 104.4° |
| 2045-06-03 Sat | 1 | — | unknown | — | 79.2° 10:05 | 4.71 | 84% | 92.8° |
| 2045-06-04 Sun | 1 | — | unknown | — | 79.2° 10:00 | 4.68 | 76% | 81.3° |
| 2045-06-05 Mon | 1 | — | unknown | — | 79.2° 09:55 | 4.65 | 68% | 69.9° |
| 2045-06-06 Tue | 1 | — | unknown | — | 79.2° 09:55 | 4.62 | 59% | 58.5° |
| 2045-06-07 Wed | 1 | — | unknown | — | 79.2° 09:50 | 4.6 | 49% | 47.1° |
| 2045-06-08 Thu | 1 | — | unknown | — | 79.2° 09:45 | 4.57 | 40% | 35.8° |
| 2045-06-09 Fri | 2 | — | unknown | — | 79.2° 09:40 | 4.55 | 30% | 25.1° |
| 2045-06-10 Sat | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:35 | 4.53 | 21% | 16.5° |
| 2045-06-11 Sun | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.2° 09:35 | 4.51 | 13% | 15.6° |
| 2045-06-12 Mon | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:30 | 4.49 | 7% | 24.0° |
| 2045-06-13 Tue | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:25 | 4.47 | 2% | 36.0° |
| 2045-06-14 Wed | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:20 | 4.46 | 0% | 49.3° |
| 2045-06-15 Thu | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.2° 09:20 | 4.45 | 1% | 63.3° |
| 2045-06-16 Fri | 8 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.2° 09:15 | 4.44 | 5% | 77.6° |
| 2045-06-17 Sat | 9 | — | unknown | 03:15–04:30 (marginal, 1.25 h) | 79.2° 09:10 | 4.43 | 11% | 91.9° |
| 2045-06-18 Sun | 10 | — | unknown | 03:10–04:30 (marginal, 1.33 h) | 79.2° 09:05 | 4.43 | 20% | 106.2° |
| 2045-06-19 Mon | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 09:00 | 4.42 | 30% | 120.1° |
| 2045-06-20 Tue | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 09:00 | 4.42 | 41% | 133.6° |
| 2045-06-21 Wed | 14 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:55 | 4.42 | 52% | 146.4° |
| 2045-06-22 Thu | 15 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:50 | 4.43 | 63% | 157.7° |
| 2045-06-23 Fri | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.2° 08:45 | 4.43 | 73% | 165.0° |
| 2045-06-24 Sat | 19 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.2° 08:40 | 4.44 | 82% | 162.7° |
| 2045-06-25 Sun | 21 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.2° 08:40 | 4.45 | 89% | 153.6° |
| 2045-06-26 Mon | 19 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.2° 08:35 | 4.46 | 94% | 142.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-05-28&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.