← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-01-23 Sat | 0 | — | unknown | — | 71.1° 12:15 | 11.04 | 32% | 81.2° |
| 2044-01-24 Sun | 0 | — | unknown | — | 71.1° 12:10 | 11.01 | 24% | 73.2° |
| 2044-01-25 Mon | 0 | — | unknown | — | 71.1° 12:05 | 10.98 | 16% | 65.6° |
| 2044-01-26 Tue | 0 | — | unknown | — | 71.1° 12:00 | 10.95 | 10% | 58.6° |
| 2044-01-27 Wed | 0 | — | unknown | — | 71.1° 11:55 | 10.93 | 5% | 52.6° |
| 2044-01-28 Thu | 1 | — | unknown | — | 71.1° 11:50 | 10.9 | 2% | 48.2° |
| 2044-01-29 Fri | 1 | — | unknown | — | 71.1° 11:45 | 10.86 | 0% | 45.8° |
| 2044-01-30 Sat | 1 | — | unknown | — | 71.1° 11:45 | 10.83 | 1% | 45.9° |
| 2044-01-31 Sun | 1 | — | unknown | — | 71.1° 11:40 | 10.8 | 3% | 48.7° |
| 2044-02-01 Mon | 1 | — | unknown | — | 71.1° 11:35 | 10.77 | 8% | 53.8° |
| 2044-02-02 Tue | 1 | — | unknown | — | 71.1° 11:30 | 10.74 | 14% | 60.6° |
| 2044-02-03 Wed | 2 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:25 | 10.7 | 22% | 68.8° |
| 2044-02-04 Thu | 2 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:25 | 10.67 | 32% | 77.8° |
| 2044-02-05 Fri | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.63 | 43% | 87.3° |
| 2044-02-06 Sat | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.6 | 54% | 97.0° |
| 2044-02-07 Sun | 3 | — | unknown | 06:10–06:25 (marginal, 0.25 h) | 71.1° 11:10 | 10.56 | 65% | 106.7° |
| 2044-02-08 Mon | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:05 | 10.53 | 76% | 115.9° |
| 2044-02-09 Tue | 4 | — | unknown | 06:00–06:25 (marginal, 0.42 h) | 71.1° 11:05 | 10.49 | 85% | 124.1° |
| 2044-02-10 Wed | 5 | — | unknown | 05:30–05:50 (marginal, 0.33 h) | 71.1° 11:00 | 10.45 | 92% | 130.4° |
| 2044-02-11 Thu | 5 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:55 | 10.42 | 98% | 134.0° |
| 2044-02-12 Fri | 5 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:50 | 10.38 | 100% | 134.1° |
| 2044-02-13 Sat | 6 | — | unknown | 05:20–05:50 (marginal, 0.5 h) | 71.1° 10:50 | 10.34 | 99% | 130.9° |
| 2044-02-14 Sun | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:45 | 10.3 | 96% | 125.2° |
| 2044-02-15 Mon | 7 | — | unknown | 05:10–05:45 (marginal, 0.58 h) | 71.1° 10:40 | 10.26 | 92% | 117.9° |
| 2044-02-16 Tue | 7 | — | unknown | 05:05–05:45 (marginal, 0.67 h) | 71.1° 10:35 | 10.22 | 85% | 109.7° |
| 2044-02-17 Wed | 8 | — | unknown | 05:05–06:15 (marginal, 1.17 h) | 71.1° 10:30 | 10.18 | 77% | 101.2° |
| 2044-02-18 Thu | 8 | — | unknown | 05:00–05:40 (marginal, 0.67 h) | 71.1° 10:30 | 10.14 | 68% | 92.6° |
| 2044-02-19 Fri | 8 | — | unknown | 04:55–06:10 (marginal, 1.25 h) | 71.1° 10:25 | 10.1 | 59% | 84.1° |
| 2044-02-20 Sat | 10 | — | unknown | 05:35–05:40 (good, 0.08 h) | 71.1° 10:20 | 10.06 | 49% | 75.9° |
| 2044-02-21 Sun | 11 | — | unknown | 05:25–05:35 (good, 0.17 h) | 71.1° 10:15 | 10.01 | 40% | 68.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-01-23&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.