← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-05-20 Sun | 6 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.8° 10:10 | 5.31 | 99% | 130.8° |
| 2046-05-21 Mon | 7 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.7° 10:05 | 5.26 | 96% | 119.7° |
| 2046-05-22 Tue | 6 | — | unknown | 03:25–03:55 (marginal, 0.5 h) | 89.6° 10:00 | 5.21 | 91% | 108.3° |
| 2046-05-23 Wed | 7 | — | unknown | 03:20–03:55 (marginal, 0.58 h) | 89.6° 10:00 | 5.17 | 84% | 97.0° |
| 2046-05-24 Thu | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.8° 09:55 | 5.12 | 76% | 85.9° |
| 2046-05-25 Fri | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.8° 09:50 | 5.07 | 67% | 75.1° |
| 2046-05-26 Sat | 7 | — | unknown | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:45 | 5.03 | 57% | 64.7° |
| 2046-05-27 Sun | 9 | — | unknown | 03:05–03:50 (marginal, 0.75 h) | 89.5° 09:40 | 4.99 | 48% | 54.8° |
| 2046-05-28 Mon | 10 | — | unknown | 03:00–03:50 (marginal, 0.83 h) | 89.7° 09:40 | 4.94 | 39% | 45.5° |
| 2046-05-29 Tue | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.8° 09:35 | 4.9 | 30% | 37.3° |
| 2046-05-30 Wed | 13 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.8° 09:30 | 4.86 | 21% | 31.1° |
| 2046-05-31 Thu | 16 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:25 | 4.83 | 14% | 28.3° |
| 2046-06-01 Fri | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.5° 09:25 | 4.79 | 8% | 30.2° |
| 2046-06-02 Sat | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.7° 09:20 | 4.75 | 3% | 36.2° |
| 2046-06-03 Sun | 22 | — | unknown | 03:10–03:45 (good, 0.58 h) | 89.8° 09:15 | 4.72 | 1% | 45.0° |
| 2046-06-04 Mon | 23 | — | unknown | 03:05–03:45 (good, 0.67 h) | 89.8° 09:10 | 4.69 | 0% | 55.2° |
| 2046-06-05 Tue | 24 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.6° 09:05 | 4.66 | 2% | 66.5° |
| 2046-06-06 Wed | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 89.6° 09:05 | 4.63 | 6% | 78.3° |
| 2046-06-07 Thu | 26 | — | unknown | 02:55–03:40 (good, 0.75 h) | 89.8° 09:00 | 4.6 | 12% | 90.4° |
| 2046-06-08 Fri | 27 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.8° 08:55 | 4.58 | 21% | 102.7° |
| 2046-06-09 Sat | 28 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.7° 08:50 | 4.55 | 31% | 114.9° |
| 2046-06-10 Sun | 30 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.5° 08:45 | 4.53 | 42% | 126.7° |
| 2046-06-11 Mon | 31 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:45 | 4.51 | 53% | 137.5° |
| 2046-06-12 Tue | 33 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.8° 08:40 | 4.49 | 65% | 146.4° |
| 2046-06-13 Wed | 33 | — | unknown | 02:30–03:40 (good, 1.17 h) | 89.8° 08:35 | 4.48 | 75% | 151.4° |
| 2046-06-14 Thu | 34 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.6° 08:30 | 4.46 | 84% | 150.4° |
| 2046-06-15 Fri | 35 | — | unknown | 02:30–03:40 (good, 1.17 h) | 89.5° 08:30 | 4.45 | 92% | 144.0° |
| 2046-06-16 Sat | 32 | — | unknown | 02:30–03:40 (good, 1.17 h) | 89.7° 08:25 | 4.44 | 97% | 134.6° |
| 2046-06-17 Sun | 32 | — | unknown | 02:25–03:40 (good, 1.25 h) | 89.8° 08:20 | 4.43 | 99% | 123.8° |
| 2046-06-18 Mon | 30 | — | unknown | 02:30–03:40 (good, 1.17 h) | 89.8° 08:15 | 4.43 | 100% | 112.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-05-20&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.