← 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. |
|---|---|---|---|---|---|---|---|---|
| 2035-12-21 Fri | 25 | — | unknown | 18:35–19:30 (good, 0.92 h) | 71.1° 14:25 | 11.51 | 47% | 113.6° |
| 2035-12-22 Sat | 24 | — | unknown | 18:35–19:25 (good, 0.83 h) | 71.1° 14:20 | 11.51 | 37% | 104.0° |
| 2035-12-23 Sun | 22 | — | unknown | 18:40–19:20 (good, 0.67 h) | 71.1° 14:15 | 11.51 | 28% | 94.4° |
| 2035-12-24 Mon | 20 | — | unknown | 18:40–19:20 (good, 0.67 h) | 71.1° 14:10 | 11.5 | 19% | 84.9° |
| 2035-12-25 Tue | 19 | — | unknown | 18:40–19:15 (good, 0.58 h) | 71.1° 14:10 | 11.5 | 12% | 75.7° |
| 2035-12-26 Wed | 18 | — | unknown | 18:40–19:10 (good, 0.5 h) | 71.1° 14:05 | 11.5 | 7% | 66.8° |
| 2035-12-27 Thu | 17 | — | unknown | 18:40–19:05 (good, 0.42 h) | 71.1° 14:00 | 11.49 | 3% | 58.6° |
| 2035-12-28 Fri | 15 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 13:55 | 11.49 | 0% | 51.3° |
| 2035-12-29 Sat | 13 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 13:50 | 11.48 | 0% | 45.5° |
| 2035-12-30 Sun | 11 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 13:50 | 11.47 | 2% | 41.7° |
| 2035-12-31 Mon | 9 | — | unknown | 18:45–18:50 (good, 0.08 h) | 71.1° 13:45 | 11.46 | 5% | 40.4° |
| 2036-01-01 Tue | 7 | — | unknown | 18:10–19:15 (marginal, 1.08 h) | 71.1° 13:40 | 11.45 | 10% | 42.0° |
| 2036-01-02 Wed | 6 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.44 | 16% | 46.1° |
| 2036-01-03 Thu | 5 | — | unknown | 18:45–19:05 (marginal, 0.33 h) | 71.1° 13:35 | 11.43 | 23% | 52.2° |
| 2036-01-04 Fri | 3 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:30 | 11.42 | 32% | 59.9° |
| 2036-01-05 Sat | 3 | — | unknown | 18:45–19:00 (marginal, 0.25 h) | 71.1° 13:25 | 11.41 | 42% | 68.5° |
| 2036-01-06 Sun | 2 | — | unknown | 18:45–18:55 (marginal, 0.17 h) | 71.1° 13:20 | 11.39 | 52% | 78.0° |
| 2036-01-07 Mon | 1 | — | unknown | — | 71.1° 13:15 | 11.38 | 62% | 88.0° |
| 2036-01-08 Tue | 1 | — | unknown | — | 71.1° 13:15 | 11.36 | 73% | 98.4° |
| 2036-01-09 Wed | 1 | — | unknown | — | 71.1° 13:10 | 11.35 | 82% | 108.9° |
| 2036-01-10 Thu | 1 | — | unknown | — | 71.1° 13:05 | 11.33 | 90% | 119.2° |
| 2036-01-11 Fri | 1 | — | unknown | — | 71.1° 13:00 | 11.31 | 96% | 128.5° |
| 2036-01-12 Sat | 0 | — | unknown | — | 71.1° 12:55 | 11.29 | 100% | 135.7° |
| 2036-01-13 Sun | 0 | — | unknown | — | 71.1° 12:55 | 11.28 | 100% | 139.4° |
| 2036-01-14 Mon | 0 | — | unknown | — | 71.1° 12:50 | 11.26 | 97% | 138.5° |
| 2036-01-15 Tue | 0 | — | unknown | — | 71.1° 12:45 | 11.23 | 91% | 133.4° |
| 2036-01-16 Wed | 0 | — | unknown | — | 71.1° 12:40 | 11.21 | 83% | 125.6° |
| 2036-01-17 Thu | 0 | — | unknown | — | 71.1° 12:40 | 11.19 | 74% | 116.4° |
| 2036-01-18 Fri | 0 | — | unknown | — | 71.1° 12:35 | 11.17 | 64% | 106.7° |
| 2036-01-19 Sat | 0 | — | unknown | — | 71.1° 12:30 | 11.14 | 54% | 96.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2035-12-21&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.