← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-01-21 Mon | 0 | — | unknown | — | 71.1° 12:20 | 11.08 | 19% | 69.6° |
| 2047-01-22 Tue | 0 | — | unknown | — | 71.1° 12:15 | 11.06 | 11% | 60.1° |
| 2047-01-23 Wed | 0 | — | unknown | — | 71.1° 12:15 | 11.03 | 5% | 51.8° |
| 2047-01-24 Thu | 0 | — | unknown | — | 71.1° 12:10 | 11.0 | 1% | 45.4° |
| 2047-01-25 Fri | 0 | — | unknown | — | 71.2° 12:05 | 10.98 | 0% | 41.5° |
| 2047-01-26 Sat | 0 | — | unknown | — | 71.1° 12:00 | 10.95 | 1% | 40.9° |
| 2047-01-27 Sun | 1 | — | unknown | — | 71.1° 11:55 | 10.92 | 4% | 43.4° |
| 2047-01-28 Mon | 1 | — | unknown | — | 71.2° 11:50 | 10.89 | 8% | 48.5° |
| 2047-01-29 Tue | 1 | — | unknown | — | 71.2° 11:45 | 10.86 | 14% | 55.2° |
| 2047-01-30 Wed | 1 | — | unknown | — | 71.1° 11:40 | 10.82 | 22% | 62.9° |
| 2047-01-31 Thu | 1 | — | unknown | — | 71.1° 11:40 | 10.79 | 30% | 71.3° |
| 2047-02-01 Fri | 1 | — | unknown | — | 71.1° 11:35 | 10.76 | 39% | 80.0° |
| 2047-02-02 Sat | 1 | — | unknown | — | 71.2° 11:30 | 10.73 | 48% | 89.0° |
| 2047-02-03 Sun | 2 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 71.1° 11:25 | 10.69 | 58% | 98.0° |
| 2047-02-04 Mon | 2 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.66 | 67% | 107.1° |
| 2047-02-05 Tue | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:20 | 10.62 | 76% | 116.0° |
| 2047-02-06 Wed | 3 | — | unknown | 05:45–05:55 (marginal, 0.17 h) | 71.1° 11:15 | 10.59 | 84% | 124.3° |
| 2047-02-07 Thu | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.2° 11:10 | 10.55 | 91% | 131.7° |
| 2047-02-08 Fri | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:05 | 10.52 | 96% | 137.1° |
| 2047-02-09 Sat | 4 | — | unknown | 05:35–05:50 (marginal, 0.25 h) | 71.1° 11:00 | 10.48 | 99% | 139.3° |
| 2047-02-10 Sun | 4 | — | unknown | 05:30–05:50 (marginal, 0.33 h) | 71.1° 11:00 | 10.44 | 100% | 137.5° |
| 2047-02-11 Mon | 5 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.2° 10:55 | 10.41 | 98% | 132.0° |
| 2047-02-12 Tue | 6 | — | unknown | 05:20–05:50 (marginal, 0.5 h) | 71.2° 10:50 | 10.37 | 92% | 123.8° |
| 2047-02-13 Wed | 5 | — | unknown | 05:20–05:45 (marginal, 0.42 h) | 71.1° 10:45 | 10.33 | 85% | 114.1° |
| 2047-02-14 Thu | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:45 | 10.29 | 76% | 103.6° |
| 2047-02-15 Fri | 6 | — | unknown | 05:10–05:45 (marginal, 0.58 h) | 71.1° 10:40 | 10.25 | 65% | 92.8° |
| 2047-02-16 Sat | 7 | — | unknown | 05:05–05:45 (marginal, 0.67 h) | 71.2° 10:35 | 10.21 | 54% | 82.1° |
| 2047-02-17 Sun | 8 | — | unknown | 05:00–05:40 (marginal, 0.67 h) | 71.1° 10:30 | 10.17 | 43% | 71.8° |
| 2047-02-18 Mon | 9 | — | unknown | 05:35–05:40 (good, 0.08 h) | 71.1° 10:25 | 10.13 | 32% | 62.2° |
| 2047-02-19 Tue | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:25 | 10.09 | 22% | 53.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-01-21&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.