← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-03-27 Sun | 19 | — | unknown | 21:20–21:55 (good, 0.58 h) | 42.9° 18:35 | 8.32 | 3% | 93.1° |
| 2044-03-28 Mon | 17 | — | unknown | 21:20–21:50 (good, 0.5 h) | 42.9° 18:30 | 8.27 | 0% | 81.8° |
| 2044-03-29 Tue | 16 | — | unknown | 21:20–21:45 (good, 0.42 h) | 42.9° 18:30 | 8.21 | 0% | 70.4° |
| 2044-03-30 Wed | 13 | — | unknown | 21:25–21:45 (good, 0.33 h) | 42.9° 18:25 | 8.16 | 3% | 59.3° |
| 2044-03-31 Thu | 11 | — | unknown | 21:25–21:35 (good, 0.17 h) | 42.9° 18:20 | 8.1 | 8% | 48.9° |
| 2044-04-01 Fri | 9 | — | unknown | 20:50–22:05 (marginal, 1.25 h) | 42.9° 18:15 | 8.05 | 16% | 40.3° |
| 2044-04-02 Sat | 6 | — | unknown | 21:25–22:00 (marginal, 0.58 h) | 42.9° 18:10 | 7.99 | 25% | 34.9° |
| 2044-04-03 Sun | 4 | — | unknown | 21:30–22:00 (marginal, 0.5 h) | 42.9° 18:10 | 7.94 | 36% | 34.3° |
| 2044-04-04 Mon | 3 | — | unknown | 21:30–21:50 (marginal, 0.33 h) | 42.9° 18:05 | 7.88 | 47% | 38.6° |
| 2044-04-05 Tue | 2 | — | unknown | 21:30–21:35 (marginal, 0.08 h) | 42.9° 18:00 | 7.83 | 59% | 46.3° |
| 2044-04-06 Wed | 1 | — | unknown | — | 42.9° 17:55 | 7.77 | 70% | 55.9° |
| 2044-04-07 Thu | 1 | — | unknown | — | 42.9° 17:50 | 7.71 | 79% | 66.4° |
| 2044-04-08 Fri | 1 | — | unknown | — | 42.9° 17:50 | 7.66 | 87% | 77.4° |
| 2044-04-09 Sat | 1 | — | unknown | — | 42.9° 17:45 | 7.6 | 94% | 88.4° |
| 2044-04-10 Sun | 1 | — | unknown | — | 42.9° 17:40 | 7.54 | 98% | 99.3° |
| 2044-04-11 Mon | 1 | — | unknown | — | 42.9° 17:35 | 7.49 | 100% | 109.8° |
| 2044-04-12 Tue | 1 | — | unknown | — | 42.9° 17:35 | 7.43 | 100% | 119.8° |
| 2044-04-13 Wed | 1 | — | unknown | — | 42.9° 17:30 | 7.37 | 98% | 129.0° |
| 2044-04-14 Thu | 0 | — | unknown | — | 42.9° 17:25 | 7.31 | 94% | 136.9° |
| 2044-04-15 Fri | 0 | — | unknown | — | 42.9° 17:20 | 7.26 | 88% | 142.8° |
| 2044-04-16 Sat | 0 | — | unknown | — | 42.9° 17:15 | 7.2 | 81% | 145.9° |
| 2044-04-17 Sun | 0 | — | unknown | — | 42.9° 17:15 | 7.14 | 73% | 145.5° |
| 2044-04-18 Mon | 0 | — | unknown | — | 42.9° 17:10 | 7.08 | 65% | 141.7° |
| 2044-04-19 Tue | 0 | — | unknown | — | 42.9° 17:05 | 7.02 | 55% | 135.4° |
| 2044-04-20 Wed | 0 | — | unknown | — | 42.9° 17:00 | 6.97 | 46% | 127.4° |
| 2044-04-21 Thu | 0 | — | unknown | — | 42.9° 16:55 | 6.91 | 36% | 118.2° |
| 2044-04-22 Fri | 0 | — | unknown | — | 42.9° 16:55 | 6.85 | 27% | 108.2° |
| 2044-04-23 Sat | 0 | — | unknown | — | 42.9° 16:50 | 6.79 | 18% | 97.6° |
| 2044-04-24 Sun | 0 | — | unknown | — | 42.9° 16:45 | 6.73 | 11% | 86.5° |
| 2044-04-25 Mon | 0 | — | unknown | — | 42.9° 16:40 | 6.67 | 5% | 75.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-03-27&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.