← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-05-07 Wed | 1 | — | unknown | — | 89.7° 11:00 | 6.01 | 93% | 125.2° |
| 2042-05-08 Thu | 2 | — | unknown | — | 89.6° 10:55 | 5.96 | 87% | 115.4° |
| 2042-05-09 Fri | 2 | — | unknown | — | 89.6° 10:55 | 5.9 | 79% | 104.9° |
| 2042-05-10 Sat | 2 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.8° 10:50 | 5.84 | 70% | 93.9° |
| 2042-05-11 Sun | 2 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.8° 10:45 | 5.79 | 60% | 82.6° |
| 2042-05-12 Mon | 2 | — | unknown | 04:05–04:10 (marginal, 0.08 h) | 89.7° 10:40 | 5.73 | 49% | 71.3° |
| 2042-05-13 Tue | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.5° 10:35 | 5.68 | 37% | 60.1° |
| 2042-05-14 Wed | 4 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.6° 10:35 | 5.62 | 27% | 49.5° |
| 2042-05-15 Thu | 5 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.8° 10:30 | 5.57 | 17% | 40.4° |
| 2042-05-16 Fri | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.52 | 9% | 34.3° |
| 2042-05-17 Sat | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.6° 10:20 | 5.47 | 3% | 33.4° |
| 2042-05-18 Sun | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.5° 10:20 | 5.41 | 0% | 37.9° |
| 2042-05-19 Mon | 7 | — | unknown | 04:10–04:45 (marginal, 0.58 h) | 89.7° 10:15 | 5.36 | 0% | 46.2° |
| 2042-05-20 Tue | 8 | — | unknown | 04:05–04:45 (marginal, 0.67 h) | 89.8° 10:10 | 5.31 | 3% | 56.4° |
| 2042-05-21 Wed | 9 | — | unknown | 03:30–04:45 (marginal, 1.25 h) | 89.7° 10:05 | 5.26 | 8% | 67.3° |
| 2042-05-22 Thu | 9 | — | unknown | 04:00–04:45 (marginal, 0.75 h) | 89.6° 10:00 | 5.22 | 15% | 78.3° |
| 2042-05-23 Fri | 10 | — | unknown | 03:20–04:45 (marginal, 1.42 h) | 89.6° 10:00 | 5.17 | 23% | 89.2° |
| 2042-05-24 Sat | 11 | — | unknown | 03:50–03:55 (good, 0.08 h) | 89.7° 09:55 | 5.12 | 32% | 99.9° |
| 2042-05-25 Sun | 12 | — | unknown | 03:45–03:55 (good, 0.17 h) | 89.8° 09:50 | 5.08 | 42% | 110.1° |
| 2042-05-26 Mon | 12 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.7° 09:45 | 5.03 | 52% | 119.7° |
| 2042-05-27 Tue | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.5° 09:40 | 4.99 | 61% | 128.7° |
| 2042-05-28 Wed | 15 | — | unknown | 03:35–03:50 (good, 0.25 h) | 89.6° 09:40 | 4.95 | 70% | 136.6° |
| 2042-05-29 Thu | 16 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.8° 09:35 | 4.91 | 78% | 142.8° |
| 2042-05-30 Fri | 14 | — | unknown | 03:35–03:45 (good, 0.17 h) | 89.8° 09:30 | 4.87 | 86% | 146.4° |
| 2042-05-31 Sat | 15 | — | unknown | 03:30–03:45 (good, 0.25 h) | 89.6° 09:25 | 4.83 | 92% | 146.5° |
| 2042-06-01 Sun | 16 | — | unknown | 03:30–03:45 (good, 0.25 h) | 89.5° 09:25 | 4.79 | 96% | 142.8° |
| 2042-06-02 Mon | 17 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.7° 09:20 | 4.76 | 99% | 136.3° |
| 2042-06-03 Tue | 18 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.8° 09:15 | 4.72 | 100% | 127.7° |
| 2042-06-04 Wed | 18 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.7° 09:10 | 4.69 | 99% | 118.0° |
| 2042-06-05 Thu | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 89.6° 09:05 | 4.66 | 95% | 107.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-05-07&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.