← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-03-17 Wed | 15 | — | unknown | 20:05–21:55 (marginal, 1.83 h) | 72.5° 16:30 | 8.87 | 86% | 74.0° |
| 2038-03-18 Thu | 18 | — | unknown | 20:05–20:10 (good, 0.08 h) | 72.5° 16:25 | 8.82 | 93% | 88.3° |
| 2038-03-19 Fri | 21 | — | unknown | 20:10–21:05 (good, 0.92 h) | 72.5° 16:20 | 8.77 | 98% | 103.0° |
| 2038-03-20 Sat | 26 | — | unknown | 20:10–21:15 (good, 1.08 h) | 72.5° 16:15 | 8.72 | 100% | 117.9° |
| 2038-03-21 Sun | 26 | — | unknown | 20:10–21:15 (good, 1.08 h) | 72.5° 16:15 | 8.67 | 99% | 132.9° |
| 2038-03-22 Mon | 29 | — | unknown | 20:10–21:10 (good, 1.0 h) | 72.5° 16:10 | 8.61 | 95% | 147.7° |
| 2038-03-23 Tue | 28 | — | unknown | 20:15–21:15 (good, 1.0 h) | 72.5° 16:05 | 8.56 | 88% | 161.9° |
| 2038-03-24 Wed | 27 | — | unknown | 20:15–21:10 (good, 0.92 h) | 72.5° 16:00 | 8.51 | 79% | 172.0° |
| 2038-03-25 Thu | 25 | — | unknown | 20:15–21:10 (good, 0.92 h) | 72.5° 15:55 | 8.46 | 69% | 165.4° |
| 2038-03-26 Fri | 23 | — | unknown | 20:15–21:05 (good, 0.83 h) | 72.5° 15:55 | 8.4 | 59% | 152.7° |
| 2038-03-27 Sat | 22 | — | unknown | 20:20–21:00 (good, 0.67 h) | 72.5° 15:50 | 8.35 | 48% | 139.7° |
| 2038-03-28 Sun | 20 | — | unknown | 21:20–21:55 (good, 0.58 h) | 72.5° 16:45 | 8.3 | 38% | 127.0° |
| 2038-03-29 Mon | 19 | — | unknown | 21:20–21:50 (good, 0.5 h) | 72.5° 16:40 | 8.24 | 28% | 114.4° |
| 2038-03-30 Tue | 17 | — | unknown | 21:20–21:50 (good, 0.5 h) | 72.5° 16:40 | 8.19 | 20% | 102.1° |
| 2038-03-31 Wed | 13 | — | unknown | 21:25–21:45 (good, 0.33 h) | 72.5° 16:35 | 8.13 | 12% | 90.0° |
| 2038-04-01 Thu | 13 | — | unknown | 21:25–21:40 (good, 0.25 h) | 72.5° 16:30 | 8.08 | 7% | 78.1° |
| 2038-04-02 Fri | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:25 | 8.02 | 3% | 66.2° |
| 2038-04-03 Sat | 9 | — | unknown | 21:25–21:35 (good, 0.17 h) | 72.5° 16:20 | 7.97 | 1% | 54.5° |
| 2038-04-04 Sun | 7 | — | unknown | 20:55–21:55 (marginal, 1.0 h) | 72.5° 16:20 | 7.91 | 0% | 42.9° |
| 2038-04-05 Mon | 6 | — | unknown | 20:55–21:25 (marginal, 0.5 h) | 72.5° 16:15 | 7.86 | 2% | 31.4° |
| 2038-04-06 Tue | 5 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 72.5° 16:10 | 7.8 | 5% | 20.1° |
| 2038-04-07 Wed | 3 | — | unknown | 21:00–21:15 (marginal, 0.25 h) | 72.5° 16:05 | 7.74 | 9% | 10.2° |
| 2038-04-08 Thu | 2 | — | unknown | 21:35–21:40 (marginal, 0.08 h) | 72.5° 16:00 | 7.69 | 16% | 9.2° |
| 2038-04-09 Fri | 1 | — | unknown | — | 72.5° 16:00 | 7.63 | 23% | 18.9° |
| 2038-04-10 Sat | 1 | — | unknown | — | 72.5° 15:55 | 7.57 | 32% | 30.5° |
| 2038-04-11 Sun | 1 | — | unknown | — | 72.5° 15:50 | 7.52 | 42% | 42.8° |
| 2038-04-12 Mon | 0 | — | unknown | — | 72.5° 15:45 | 7.46 | 52% | 55.5° |
| 2038-04-13 Tue | 0 | — | unknown | — | 72.5° 15:40 | 7.4 | 62% | 68.7° |
| 2038-04-14 Wed | 0 | — | unknown | — | 72.5° 15:40 | 7.35 | 73% | 82.4° |
| 2038-04-15 Thu | 0 | — | unknown | — | 72.5° 15:35 | 7.29 | 82% | 96.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-03-17&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.