← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-01-16 Wed | 0 | — | unknown | — | 71.1° 12:40 | 11.2 | 100% | 131.3° |
| 2041-01-17 Thu | 0 | — | unknown | — | 71.1° 12:35 | 11.17 | 100% | 132.9° |
| 2041-01-18 Fri | 0 | — | unknown | — | 71.1° 12:30 | 11.15 | 97% | 132.2° |
| 2041-01-19 Sat | 0 | — | unknown | — | 71.1° 12:25 | 11.12 | 94% | 129.4° |
| 2041-01-20 Sun | 0 | — | unknown | — | 71.1° 12:25 | 11.1 | 88% | 124.8° |
| 2041-01-21 Mon | 0 | — | unknown | — | 71.1° 12:20 | 11.07 | 82% | 118.8° |
| 2041-01-22 Tue | 0 | — | unknown | — | 71.1° 12:15 | 11.05 | 74% | 111.7° |
| 2041-01-23 Wed | 0 | — | unknown | — | 71.1° 12:10 | 11.02 | 65% | 103.9° |
| 2041-01-24 Thu | 0 | — | unknown | — | 71.1° 12:05 | 10.99 | 55% | 95.6° |
| 2041-01-25 Fri | 0 | — | unknown | — | 71.1° 12:00 | 10.96 | 45% | 86.9° |
| 2041-01-26 Sat | 0 | — | unknown | — | 71.1° 11:55 | 10.93 | 34% | 78.0° |
| 2041-01-27 Sun | 0 | — | unknown | — | 71.1° 11:50 | 10.9 | 24% | 69.2° |
| 2041-01-28 Mon | 1 | — | unknown | — | 71.1° 11:45 | 10.87 | 15% | 60.8° |
| 2041-01-29 Tue | 1 | — | unknown | — | 71.1° 11:45 | 10.84 | 8% | 53.7° |
| 2041-01-30 Wed | 1 | — | unknown | — | 71.1° 11:40 | 10.81 | 3% | 48.8° |
| 2041-01-31 Thu | 1 | — | unknown | — | 71.1° 11:35 | 10.78 | 0% | 47.1° |
| 2041-02-01 Fri | 1 | — | unknown | — | 71.1° 11:30 | 10.75 | 1% | 49.1° |
| 2041-02-02 Sat | 1 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:30 | 10.71 | 5% | 54.3° |
| 2041-02-03 Sun | 2 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:25 | 10.68 | 11% | 61.7° |
| 2041-02-04 Mon | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.64 | 19% | 70.4° |
| 2041-02-05 Tue | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.61 | 29% | 79.5° |
| 2041-02-06 Wed | 3 | — | unknown | 06:10–06:25 (marginal, 0.25 h) | 71.1° 11:10 | 10.57 | 39% | 88.7° |
| 2041-02-07 Thu | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.54 | 50% | 97.6° |
| 2041-02-08 Fri | 4 | — | unknown | 05:35–05:50 (marginal, 0.25 h) | 71.1° 11:05 | 10.5 | 60% | 106.1° |
| 2041-02-09 Sat | 5 | — | unknown | 05:30–05:50 (marginal, 0.33 h) | 71.1° 11:00 | 10.46 | 69% | 113.9° |
| 2041-02-10 Sun | 6 | — | unknown | 05:55–06:25 (marginal, 0.5 h) | 71.1° 10:55 | 10.43 | 78% | 120.8° |
| 2041-02-11 Mon | 7 | — | unknown | 05:25–06:20 (marginal, 0.92 h) | 71.1° 10:50 | 10.39 | 85% | 126.4° |
| 2041-02-12 Tue | 7 | — | unknown | 05:20–05:50 (marginal, 0.5 h) | 71.1° 10:50 | 10.35 | 91% | 130.5° |
| 2041-02-13 Wed | 7 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:45 | 10.31 | 96% | 132.7° |
| 2041-02-14 Thu | 7 | — | unknown | 05:10–05:45 (marginal, 0.58 h) | 71.1° 10:40 | 10.27 | 99% | 132.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-01-16&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.