← 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. |
|---|---|---|---|---|---|---|---|---|
| 2046-12-16 Sun | 32 | — | unknown | 18:35–19:50 (good, 1.25 h) | 71.1° 14:40 | 11.5 | 87% | 138.9° |
| 2046-12-17 Mon | 31 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:40 | 11.5 | 78% | 138.5° |
| 2046-12-18 Tue | 30 | — | unknown | 18:35–19:40 (good, 1.08 h) | 71.2° 14:35 | 11.5 | 69% | 134.5° |
| 2046-12-19 Wed | 29 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:30 | 11.51 | 58% | 127.7° |
| 2046-12-20 Thu | 27 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:25 | 11.51 | 46% | 119.0° |
| 2046-12-21 Fri | 25 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:25 | 11.51 | 35% | 109.1° |
| 2046-12-22 Sat | 24 | — | unknown | 18:35–19:25 (good, 0.83 h) | 71.1° 14:20 | 11.51 | 25% | 98.6° |
| 2046-12-23 Sun | 22 | — | unknown | 18:40–19:20 (good, 0.67 h) | 71.2° 14:15 | 11.51 | 15% | 87.7° |
| 2046-12-24 Mon | 20 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:10 | 11.5 | 8% | 77.0° |
| 2046-12-25 Tue | 19 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:05 | 11.5 | 3% | 66.7° |
| 2046-12-26 Wed | 18 | — | unknown | 18:40–19:10 (good, 0.5 h) | 71.1° 14:05 | 11.5 | 0% | 57.3° |
| 2046-12-27 Thu | 16 | — | unknown | 18:40–19:05 (good, 0.42 h) | 71.1° 14:00 | 11.49 | 0% | 49.4° |
| 2046-12-28 Fri | 15 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.2° 13:55 | 11.48 | 3% | 43.7° |
| 2046-12-29 Sat | 12 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 13:50 | 11.48 | 7% | 40.9° |
| 2046-12-30 Sun | 10 | — | unknown | 18:40–18:50 (good, 0.17 h) | 71.1° 13:45 | 11.47 | 13% | 41.5° |
| 2046-12-31 Mon | 7 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.1° 13:45 | 11.46 | 20% | 45.0° |
| 2047-01-01 Tue | 6 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.2° 13:40 | 11.45 | 29% | 50.7° |
| 2047-01-02 Wed | 4 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.44 | 38% | 57.7° |
| 2047-01-03 Thu | 3 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:30 | 11.43 | 47% | 65.7° |
| 2047-01-04 Fri | 3 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:30 | 11.42 | 57% | 74.2° |
| 2047-01-05 Sat | 2 | — | unknown | 18:45–18:55 (marginal, 0.17 h) | 71.1° 13:25 | 11.4 | 66% | 83.0° |
| 2047-01-06 Sun | 2 | — | unknown | 18:50–18:55 (marginal, 0.08 h) | 71.2° 13:20 | 11.39 | 75% | 92.1° |
| 2047-01-07 Mon | 1 | — | unknown | — | 71.1° 13:15 | 11.37 | 83% | 101.3° |
| 2047-01-08 Tue | 1 | — | unknown | — | 71.1° 13:10 | 11.36 | 90% | 110.5° |
| 2047-01-09 Wed | 1 | — | unknown | — | 71.1° 13:10 | 11.34 | 95% | 119.3° |
| 2047-01-10 Thu | 1 | — | unknown | — | 71.1° 13:05 | 11.33 | 98% | 127.5° |
| 2047-01-11 Fri | 1 | — | unknown | — | 71.2° 13:00 | 11.31 | 100% | 134.2° |
| 2047-01-12 Sat | 0 | — | unknown | — | 71.1° 12:55 | 11.29 | 99% | 138.4° |
| 2047-01-13 Sun | 0 | — | unknown | — | 71.1° 12:50 | 11.27 | 96% | 139.0° |
| 2047-01-14 Mon | 0 | — | unknown | — | 71.1° 12:50 | 11.25 | 90% | 135.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2046-12-16&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.