← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-03-09 Mon | 10 | — | unknown | 19:55–20:05 (good, 0.17 h) | 89.7° 13:55 | 9.26 | 39% | 109.0° |
| 2037-03-10 Tue | 9 | — | unknown | 19:55–20:00 (good, 0.08 h) | 89.6° 13:50 | 9.21 | 29% | 99.6° |
| 2037-03-11 Wed | 7 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 89.5° 13:50 | 9.16 | 21% | 90.2° |
| 2037-03-12 Thu | 6 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 89.7° 13:45 | 9.11 | 14% | 80.9° |
| 2037-03-13 Fri | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.8° 13:40 | 9.06 | 8% | 71.8° |
| 2037-03-14 Sat | 5 | — | unknown | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:35 | 9.01 | 4% | 63.0° |
| 2037-03-15 Sun | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:30 | 8.96 | 1% | 54.9° |
| 2037-03-16 Mon | 3 | — | unknown | 20:05–20:10 (marginal, 0.08 h) | 89.6° 13:30 | 8.91 | 0% | 47.8° |
| 2037-03-17 Tue | 1 | — | unknown | — | 89.7° 13:25 | 8.86 | 1% | 42.2° |
| 2037-03-18 Wed | 1 | — | unknown | — | 89.8° 13:20 | 8.81 | 4% | 38.9° |
| 2037-03-19 Thu | 1 | — | unknown | — | 89.7° 13:15 | 8.76 | 8% | 38.7° |
| 2037-03-20 Fri | 1 | — | unknown | — | 89.5° 13:10 | 8.7 | 14% | 41.6° |
| 2037-03-21 Sat | 0 | — | unknown | — | 89.7° 13:10 | 8.65 | 22% | 47.3° |
| 2037-03-22 Sun | 0 | — | unknown | — | 89.8° 13:05 | 8.6 | 31% | 54.9° |
| 2037-03-23 Mon | 0 | — | unknown | — | 89.7° 13:00 | 8.55 | 41% | 63.9° |
| 2037-03-24 Tue | 0 | — | unknown | — | 89.6° 12:55 | 8.5 | 52% | 73.8° |
| 2037-03-25 Wed | 0 | — | unknown | — | 89.5° 12:55 | 8.44 | 63% | 84.5° |
| 2037-03-26 Thu | 0 | — | unknown | — | 89.7° 12:50 | 8.39 | 73% | 95.5° |
| 2037-03-27 Fri | 0 | — | unknown | — | 89.8° 12:45 | 8.34 | 83% | 106.8° |
| 2037-03-28 Sat | 0 | — | unknown | — | 89.7° 12:40 | 8.28 | 91% | 117.8° |
| 2037-03-29 Sun | 0 | — | unknown | — | 89.5° 13:35 | 8.23 | 97% | 127.8° |
| 2037-03-30 Mon | 0 | — | unknown | — | 89.6° 13:35 | 8.17 | 100% | 136.0° |
| 2037-03-31 Tue | 0 | — | unknown | — | 89.7° 13:30 | 8.12 | 99% | 140.9° |
| 2037-04-01 Wed | 0 | — | unknown | — | 89.8° 13:25 | 8.06 | 96% | 141.2° |
| 2037-04-02 Thu | 0 | — | unknown | — | 89.7° 13:20 | 8.01 | 91% | 137.2° |
| 2037-04-03 Fri | 0 | — | unknown | — | 89.5° 13:15 | 7.95 | 84% | 130.2° |
| 2037-04-04 Sat | 0 | — | unknown | — | 89.6° 13:15 | 7.9 | 75% | 121.5° |
| 2037-04-05 Sun | 0 | — | unknown | — | 89.8° 13:10 | 7.84 | 65% | 112.2° |
| 2037-04-06 Mon | 0 | — | unknown | — | 89.7° 13:05 | 7.79 | 55% | 102.6° |
| 2037-04-07 Tue | 0 | — | unknown | — | 89.6° 13:00 | 7.73 | 46% | 93.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-03-09&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.