← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-05-03 Wed | 1 | — | unknown | — | 89.8° 11:15 | 6.22 | 92% | 126.8° |
| 2045-05-04 Thu | 1 | — | unknown | — | 89.6° 11:10 | 6.17 | 86% | 116.5° |
| 2045-05-05 Fri | 1 | — | unknown | — | 89.6° 11:10 | 6.11 | 78% | 106.1° |
| 2045-05-06 Sat | 1 | — | unknown | — | 89.7° 11:05 | 6.05 | 70% | 95.7° |
| 2045-05-07 Sun | 1 | — | unknown | — | 89.8° 11:00 | 6.0 | 61% | 85.3° |
| 2045-05-08 Mon | 1 | — | unknown | — | 89.7° 10:55 | 5.94 | 52% | 75.0° |
| 2045-05-09 Tue | 2 | — | unknown | — | 89.6° 10:50 | 5.88 | 42% | 64.8° |
| 2045-05-10 Wed | 2 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.6° 10:50 | 5.83 | 33% | 54.8° |
| 2045-05-11 Thu | 3 | — | unknown | 04:05–04:15 (marginal, 0.17 h) | 89.8° 10:45 | 5.77 | 24% | 45.4° |
| 2045-05-12 Fri | 3 | — | unknown | 04:45–04:55 (marginal, 0.17 h) | 89.8° 10:40 | 5.72 | 16% | 37.0° |
| 2045-05-13 Sat | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.7° 10:35 | 5.66 | 10% | 30.9° |
| 2045-05-14 Sun | 5 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 89.5° 10:35 | 5.61 | 4% | 29.0° |
| 2045-05-15 Mon | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.7° 10:30 | 5.56 | 1% | 32.5° |
| 2045-05-16 Tue | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.5 | 0% | 40.2° |
| 2045-05-17 Wed | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.8° 10:20 | 5.45 | 2% | 50.5° |
| 2045-05-18 Thu | 7 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.6° 10:15 | 5.4 | 6% | 62.1° |
| 2045-05-19 Fri | 7 | — | unknown | 04:10–04:45 (marginal, 0.58 h) | 89.6° 10:15 | 5.35 | 13% | 74.3° |
| 2045-05-20 Sat | 8 | — | unknown | 04:05–04:45 (marginal, 0.67 h) | 89.7° 10:10 | 5.3 | 22% | 86.9° |
| 2045-05-21 Sun | 9 | — | unknown | 03:30–04:45 (marginal, 1.25 h) | 89.8° 10:05 | 5.25 | 32% | 99.5° |
| 2045-05-22 Mon | 9 | — | unknown | 03:25–04:45 (marginal, 1.33 h) | 89.7° 10:00 | 5.2 | 43% | 111.8° |
| 2045-05-23 Tue | 10 | — | unknown | 03:20–04:40 (marginal, 1.33 h) | 89.6° 09:55 | 5.16 | 55% | 123.6° |
| 2045-05-24 Wed | 11 | — | unknown | 03:50–03:55 (good, 0.08 h) | 89.6° 09:55 | 5.11 | 66% | 134.4° |
| 2045-05-25 Thu | 11 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.8° 09:50 | 5.06 | 76% | 143.6° |
| 2045-05-26 Fri | 12 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.8° 09:45 | 5.02 | 84% | 149.7° |
| 2045-05-27 Sat | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.7° 09:40 | 4.98 | 91% | 150.8° |
| 2045-05-28 Sun | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.5° 09:35 | 4.93 | 96% | 146.8° |
| 2045-05-29 Mon | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.7° 09:35 | 4.89 | 99% | 139.3° |
| 2045-05-30 Tue | 13 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.8° 09:30 | 4.86 | 100% | 130.0° |
| 2045-05-31 Wed | 14 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.8° 09:25 | 4.82 | 98% | 119.9° |
| 2045-06-01 Thu | 14 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.6° 09:20 | 4.78 | 95% | 109.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-05-03&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.