← 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. |
|---|---|---|---|---|---|---|---|---|
| 2035-01-20 Sat | 0 | — | unknown | — | 71.1° 12:25 | 11.11 | 88% | 123.6° |
| 2035-01-21 Sun | 0 | — | unknown | — | 71.1° 12:20 | 11.09 | 95% | 132.4° |
| 2035-01-22 Mon | 0 | — | unknown | — | 71.1° 12:15 | 11.06 | 99% | 138.6° |
| 2035-01-23 Tue | 0 | — | unknown | — | 71.1° 12:15 | 11.03 | 100% | 141.0° |
| 2035-01-24 Wed | 0 | — | unknown | — | 71.1° 12:10 | 11.01 | 98% | 138.9° |
| 2035-01-25 Thu | 0 | — | unknown | — | 71.1° 12:05 | 10.98 | 94% | 133.3° |
| 2035-01-26 Fri | 0 | — | unknown | — | 71.1° 12:00 | 10.95 | 88% | 125.5° |
| 2035-01-27 Sat | 0 | — | unknown | — | 71.1° 11:55 | 10.92 | 81% | 116.5° |
| 2035-01-28 Sun | 0 | — | unknown | — | 71.1° 11:50 | 10.89 | 72% | 107.1° |
| 2035-01-29 Mon | 1 | — | unknown | — | 71.1° 11:45 | 10.86 | 63% | 97.6° |
| 2035-01-30 Tue | 1 | — | unknown | — | 71.1° 11:40 | 10.83 | 53% | 88.2° |
| 2035-01-31 Wed | 1 | — | unknown | — | 71.1° 11:40 | 10.8 | 44% | 79.0° |
| 2035-02-01 Thu | 1 | — | unknown | — | 71.1° 11:35 | 10.76 | 34% | 70.0° |
| 2035-02-02 Fri | 1 | — | unknown | — | 71.1° 11:30 | 10.73 | 26% | 61.5° |
| 2035-02-03 Sat | 2 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 71.1° 11:25 | 10.7 | 18% | 53.6° |
| 2035-02-04 Sun | 2 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:20 | 10.66 | 11% | 46.8° |
| 2035-02-05 Mon | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.63 | 6% | 41.7° |
| 2035-02-06 Tue | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.59 | 2% | 39.1° |
| 2035-02-07 Wed | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.56 | 0% | 39.8° |
| 2035-02-08 Thu | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:05 | 10.52 | 0% | 43.8° |
| 2035-02-09 Fri | 5 | — | unknown | 06:00–06:25 (marginal, 0.42 h) | 71.1° 11:00 | 10.48 | 3% | 50.3° |
| 2035-02-10 Sat | 6 | — | unknown | 05:55–06:25 (marginal, 0.5 h) | 71.1° 11:00 | 10.45 | 7% | 58.7° |
| 2035-02-11 Sun | 6 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:55 | 10.41 | 14% | 68.3° |
| 2035-02-12 Mon | 7 | — | unknown | 05:20–06:20 (marginal, 1.0 h) | 71.1° 10:50 | 10.37 | 22% | 78.5° |
| 2035-02-13 Tue | 7 | — | unknown | 05:20–06:20 (marginal, 1.0 h) | 71.1° 10:45 | 10.33 | 32% | 89.2° |
| 2035-02-14 Wed | 8 | — | unknown | 05:40–05:45 (good, 0.08 h) | 71.1° 10:45 | 10.29 | 43% | 100.0° |
| 2035-02-15 Thu | 9 | — | unknown | 05:35–05:45 (good, 0.17 h) | 71.1° 10:40 | 10.25 | 54% | 110.7° |
| 2035-02-16 Fri | 10 | — | unknown | 05:35–05:45 (good, 0.17 h) | 71.1° 10:35 | 10.21 | 66% | 120.8° |
| 2035-02-17 Sat | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:30 | 10.17 | 76% | 129.9° |
| 2035-02-18 Sun | 12 | — | unknown | 05:25–05:40 (good, 0.25 h) | 71.1° 10:25 | 10.13 | 85% | 136.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2035-01-20&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.