← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-12-17 Wed | 30 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:35 | 11.5 | 0% | 52.2° |
| 2036-12-18 Thu | 29 | — | unknown | 18:35–19:40 (good, 1.08 h) | 71.1° 14:35 | 11.5 | 2% | 46.4° |
| 2036-12-19 Fri | 27 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:30 | 11.51 | 5% | 42.9° |
| 2036-12-20 Sat | 25 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:25 | 11.51 | 10% | 42.0° |
| 2036-12-21 Sun | 21 | — | unknown | 18:35–19:20 (good, 0.75 h) | 71.1° 14:20 | 11.51 | 16% | 44.0° |
| 2036-12-22 Mon | 18 | — | unknown | 18:35–19:15 (good, 0.67 h) | 71.1° 14:15 | 11.51 | 24% | 48.2° |
| 2036-12-23 Tue | 15 | — | unknown | 18:40–19:05 (good, 0.42 h) | 71.1° 14:15 | 11.5 | 32% | 54.2° |
| 2036-12-24 Wed | 13 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 14:10 | 11.5 | 42% | 61.4° |
| 2036-12-25 Thu | 11 | — | unknown | 18:40–18:50 (good, 0.17 h) | 71.1° 14:05 | 11.5 | 51% | 69.6° |
| 2036-12-26 Fri | 10 | — | unknown | 18:05–19:35 (marginal, 1.5 h) | 71.1° 14:00 | 11.49 | 61% | 78.3° |
| 2036-12-27 Sat | 9 | — | unknown | 18:05–19:30 (marginal, 1.42 h) | 71.1° 13:55 | 11.49 | 70% | 87.5° |
| 2036-12-28 Sun | 8 | — | unknown | 18:40–19:25 (marginal, 0.75 h) | 71.1° 13:55 | 11.48 | 79% | 97.1° |
| 2036-12-29 Mon | 8 | — | unknown | 18:40–19:25 (marginal, 0.75 h) | 71.1° 13:50 | 11.47 | 87% | 106.8° |
| 2036-12-30 Tue | 8 | — | unknown | 18:10–19:20 (marginal, 1.17 h) | 71.1° 13:45 | 11.47 | 94% | 116.3° |
| 2036-12-31 Wed | 6 | — | unknown | 18:45–19:15 (marginal, 0.5 h) | 71.1° 13:40 | 11.46 | 98% | 125.2° |
| 2037-01-01 Thu | 6 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.45 | 100% | 132.5° |
| 2037-01-02 Fri | 5 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:35 | 11.44 | 99% | 137.1° |
| 2037-01-03 Sat | 5 | — | unknown | 18:10–18:35 (marginal, 0.42 h) | 71.1° 13:30 | 11.42 | 95% | 137.8° |
| 2037-01-04 Sun | 4 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:25 | 11.41 | 89% | 134.3° |
| 2037-01-05 Mon | 3 | — | unknown | 18:15–18:30 (marginal, 0.25 h) | 71.1° 13:20 | 11.4 | 80% | 127.7° |
| 2037-01-06 Tue | 2 | — | unknown | 18:15–18:25 (marginal, 0.17 h) | 71.1° 13:20 | 11.38 | 70% | 119.1° |
| 2037-01-07 Wed | 2 | — | unknown | 18:15–18:20 (marginal, 0.08 h) | 71.1° 13:15 | 11.37 | 59% | 109.5° |
| 2037-01-08 Thu | 1 | — | unknown | — | 71.1° 13:10 | 11.35 | 48% | 99.5° |
| 2037-01-09 Fri | 1 | — | unknown | — | 71.1° 13:05 | 11.34 | 37% | 89.5° |
| 2037-01-10 Sat | 1 | — | unknown | — | 71.1° 13:00 | 11.32 | 27% | 79.7° |
| 2037-01-11 Sun | 1 | — | unknown | — | 71.1° 13:00 | 11.3 | 19% | 70.3° |
| 2037-01-12 Mon | 0 | — | unknown | — | 71.1° 12:55 | 11.28 | 11% | 61.6° |
| 2037-01-13 Tue | 0 | — | unknown | — | 71.1° 12:50 | 11.26 | 6% | 54.0° |
| 2037-01-14 Wed | 0 | — | unknown | — | 71.1° 12:45 | 11.24 | 2% | 47.8° |
| 2037-01-15 Thu | 0 | — | unknown | — | 71.1° 12:40 | 11.22 | 0% | 43.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-12-17&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.