← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-12-18 Sun | 29 | — | unknown | 18:35–19:40 (good, 1.08 h) | 71.1° 14:35 | 11.51 | 0% | 62.8° |
| 2044-12-19 Mon | 27 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:30 | 11.51 | 0% | 55.8° |
| 2044-12-20 Tue | 26 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:25 | 11.51 | 2% | 50.1° |
| 2044-12-21 Wed | 24 | — | unknown | 18:35–19:25 (good, 0.83 h) | 71.1° 14:20 | 11.51 | 6% | 46.0° |
| 2044-12-22 Thu | 21 | — | unknown | 18:35–19:20 (good, 0.75 h) | 71.1° 14:15 | 11.51 | 11% | 44.2° |
| 2044-12-23 Fri | 18 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:15 | 11.5 | 17% | 44.8° |
| 2044-12-24 Sat | 15 | — | unknown | 18:40–19:05 (good, 0.42 h) | 71.1° 14:10 | 11.5 | 25% | 47.9° |
| 2044-12-25 Sun | 13 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 14:05 | 11.5 | 34% | 52.9° |
| 2044-12-26 Mon | 10 | — | unknown | 18:40–18:45 (good, 0.08 h) | 71.1° 14:00 | 11.49 | 44% | 59.6° |
| 2044-12-27 Tue | 8 | — | unknown | 18:40–19:30 (marginal, 0.83 h) | 71.1° 13:55 | 11.49 | 54% | 67.5° |
| 2044-12-28 Wed | 7 | — | unknown | 18:40–19:25 (marginal, 0.75 h) | 71.1° 13:55 | 11.48 | 64% | 76.3° |
| 2044-12-29 Thu | 6 | — | unknown | 18:40–19:20 (marginal, 0.67 h) | 71.1° 13:50 | 11.47 | 74% | 85.9° |
| 2044-12-30 Fri | 5 | — | unknown | 18:45–19:20 (marginal, 0.58 h) | 71.1° 13:45 | 11.47 | 83% | 95.9° |
| 2044-12-31 Sat | 5 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.1° 13:40 | 11.46 | 91% | 106.0° |
| 2045-01-01 Sun | 5 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:40 | 11.45 | 96% | 115.9° |
| 2045-01-02 Mon | 5 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:35 | 11.43 | 100% | 124.8° |
| 2045-01-03 Tue | 4 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:30 | 11.42 | 100% | 131.7° |
| 2045-01-04 Wed | 4 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:25 | 11.41 | 96% | 135.5° |
| 2045-01-05 Thu | 3 | — | unknown | 18:15–18:30 (marginal, 0.25 h) | 71.1° 13:20 | 11.4 | 91% | 135.3° |
| 2045-01-06 Fri | 2 | — | unknown | 18:15–18:25 (marginal, 0.17 h) | 71.1° 13:20 | 11.38 | 83% | 131.4° |
| 2045-01-07 Sat | 2 | — | unknown | 18:15–18:20 (marginal, 0.08 h) | 71.1° 13:15 | 11.37 | 73% | 124.9° |
| 2045-01-08 Sun | 1 | — | unknown | — | 71.1° 13:10 | 11.35 | 63% | 116.9° |
| 2045-01-09 Mon | 1 | — | unknown | — | 71.1° 13:05 | 11.33 | 52% | 108.1° |
| 2045-01-10 Tue | 1 | — | unknown | — | 71.1° 13:00 | 11.32 | 42% | 99.0° |
| 2045-01-11 Wed | 1 | — | unknown | — | 71.1° 13:00 | 11.3 | 32% | 90.0° |
| 2045-01-12 Thu | 0 | — | unknown | — | 71.1° 12:55 | 11.28 | 23% | 81.1° |
| 2045-01-13 Fri | 0 | — | unknown | — | 71.1° 12:50 | 11.26 | 16% | 72.6° |
| 2045-01-14 Sat | 0 | — | unknown | — | 71.1° 12:45 | 11.24 | 9% | 64.6° |
| 2045-01-15 Sun | 0 | — | unknown | — | 71.1° 12:45 | 11.22 | 5% | 57.4° |
| 2045-01-16 Mon | 0 | — | unknown | — | 71.1° 12:40 | 11.19 | 2% | 51.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-12-18&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.