← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-05-10 Mon | 0 | — | unknown | — | 79.2° 11:40 | 5.85 | 37% | 90.9° |
| 2038-05-11 Tue | 0 | — | unknown | — | 79.2° 11:35 | 5.79 | 47% | 103.0° |
| 2038-05-12 Wed | 0 | — | unknown | — | 79.2° 11:30 | 5.73 | 58% | 115.3° |
| 2038-05-13 Thu | 0 | — | unknown | — | 79.2° 11:30 | 5.68 | 69% | 127.6° |
| 2038-05-14 Fri | 0 | — | unknown | — | 79.2° 11:25 | 5.63 | 79% | 139.5° |
| 2038-05-15 Sat | 0 | — | unknown | — | 79.2° 11:20 | 5.57 | 88% | 149.7° |
| 2038-05-16 Sun | 0 | — | unknown | — | 79.2° 11:15 | 5.52 | 95% | 155.6° |
| 2038-05-17 Mon | 0 | — | unknown | — | 79.2° 11:15 | 5.47 | 99% | 153.6° |
| 2038-05-18 Tue | 0 | — | unknown | — | 79.2° 11:10 | 5.42 | 100% | 145.0° |
| 2038-05-19 Wed | 0 | — | unknown | — | 79.2° 11:05 | 5.37 | 98% | 133.5° |
| 2038-05-20 Thu | 0 | — | unknown | — | 79.2° 11:00 | 5.32 | 94% | 121.1° |
| 2038-05-21 Fri | 0 | — | unknown | — | 79.2° 10:55 | 5.27 | 87% | 108.5° |
| 2038-05-22 Sat | 0 | — | unknown | — | 79.2° 10:55 | 5.22 | 78% | 96.2° |
| 2038-05-23 Sun | 0 | — | unknown | — | 79.2° 10:50 | 5.17 | 69% | 84.1° |
| 2038-05-24 Mon | 0 | — | unknown | — | 79.2° 10:45 | 5.12 | 59% | 72.6° |
| 2038-05-25 Tue | 0 | — | unknown | — | 79.2° 10:40 | 5.08 | 49% | 61.4° |
| 2038-05-26 Wed | 0 | — | unknown | — | 79.2° 10:35 | 5.03 | 40% | 50.9° |
| 2038-05-27 Thu | 0 | — | unknown | — | 79.2° 10:35 | 4.99 | 31% | 41.1° |
| 2038-05-28 Fri | 0 | — | unknown | — | 79.2° 10:30 | 4.95 | 22% | 32.5° |
| 2038-05-29 Sat | 0 | — | unknown | — | 79.2° 10:25 | 4.91 | 15% | 26.3° |
| 2038-05-30 Sun | 1 | — | unknown | — | 79.2° 10:20 | 4.87 | 9% | 24.2° |
| 2038-05-31 Mon | 1 | — | unknown | — | 79.2° 10:20 | 4.83 | 4% | 27.3° |
| 2038-06-01 Tue | 1 | — | unknown | — | 79.2° 10:15 | 4.79 | 1% | 34.3° |
| 2038-06-02 Wed | 1 | — | unknown | — | 79.2° 10:10 | 4.76 | 0% | 43.5° |
| 2038-06-03 Thu | 1 | — | unknown | — | 79.2° 10:05 | 4.72 | 1% | 53.8° |
| 2038-06-04 Fri | 1 | — | unknown | — | 79.2° 10:00 | 4.69 | 4% | 64.8° |
| 2038-06-05 Sat | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.2° 10:00 | 4.66 | 8% | 76.3° |
| 2038-06-06 Sun | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.2° 09:55 | 4.63 | 15% | 88.1° |
| 2038-06-07 Mon | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.2° 09:50 | 4.6 | 23% | 100.2° |
| 2038-06-08 Tue | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:45 | 4.58 | 33% | 112.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-05-10&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.