← 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. |
|---|---|---|---|---|---|---|---|---|
| 2047-08-17 Sat | 0 | — | unknown | — | 50.1° 16:10 | 6.75 | 13% | 83.7° |
| 2047-08-18 Sun | 0 | — | unknown | — | 50.1° 16:05 | 6.81 | 7% | 70.9° |
| 2047-08-19 Mon | 0 | — | unknown | — | 50.1° 16:00 | 6.87 | 3% | 57.9° |
| 2047-08-20 Tue | 0 | — | unknown | — | 50.1° 15:55 | 6.93 | 0% | 44.5° |
| 2047-08-21 Wed | 0 | — | unknown | — | 50.1° 15:55 | 6.98 | 0% | 31.1° |
| 2047-08-22 Thu | 0 | — | unknown | — | 50.1° 15:50 | 7.04 | 3% | 18.3° |
| 2047-08-23 Fri | 0 | — | unknown | — | 50.1° 15:45 | 7.1 | 9% | 9.9° |
| 2047-08-24 Sat | 0 | — | unknown | — | 50.1° 15:40 | 7.15 | 16% | 16.5° |
| 2047-08-25 Sun | 0 | — | unknown | — | 50.1° 15:40 | 7.21 | 26% | 29.3° |
| 2047-08-26 Mon | 0 | — | unknown | — | 50.1° 15:35 | 7.27 | 36% | 43.0° |
| 2047-08-27 Tue | 0 | — | unknown | — | 50.1° 15:30 | 7.33 | 48% | 56.8° |
| 2047-08-28 Wed | 0 | — | unknown | — | 50.1° 15:25 | 7.38 | 59% | 70.6° |
| 2047-08-29 Thu | 0 | — | unknown | — | 50.1° 15:20 | 7.44 | 70% | 84.3° |
| 2047-08-30 Fri | 0 | — | unknown | — | 50.1° 15:20 | 7.49 | 80% | 97.7° |
| 2047-08-31 Sat | 0 | — | unknown | — | 50.1° 15:15 | 7.55 | 88% | 111.0° |
| 2047-09-01 Sun | 0 | — | unknown | — | 50.1° 15:10 | 7.61 | 94% | 124.0° |
| 2047-09-02 Mon | 0 | — | unknown | — | 50.1° 15:05 | 7.66 | 98% | 136.8° |
| 2047-09-03 Tue | 0 | — | unknown | — | 50.1° 15:00 | 7.72 | 100% | 149.1° |
| 2047-09-04 Wed | 0 | — | unknown | — | 50.1° 15:00 | 7.77 | 100% | 160.6° |
| 2047-09-05 Thu | 0 | — | unknown | — | 50.1° 14:55 | 7.83 | 97% | 169.3° |
| 2047-09-06 Fri | 0 | — | unknown | — | 50.1° 14:50 | 7.88 | 93% | 167.5° |
| 2047-09-07 Sat | 0 | — | unknown | — | 50.1° 14:45 | 7.94 | 88% | 158.0° |
| 2047-09-08 Sun | 0 | — | unknown | — | 50.1° 14:45 | 7.99 | 81% | 147.0° |
| 2047-09-09 Mon | 0 | — | unknown | — | 50.1° 14:40 | 8.05 | 73% | 135.6° |
| 2047-09-10 Tue | 0 | — | unknown | — | 50.1° 14:35 | 8.1 | 64% | 124.1° |
| 2047-09-11 Wed | 0 | — | unknown | — | 50.1° 14:30 | 8.16 | 55% | 112.4° |
| 2047-09-12 Thu | 0 | — | unknown | — | 50.1° 14:25 | 8.21 | 46% | 100.5° |
| 2047-09-13 Fri | 0 | — | unknown | — | 50.1° 14:25 | 8.26 | 36% | 88.4° |
| 2047-09-14 Sat | 0 | — | unknown | — | 50.1° 14:20 | 8.32 | 27% | 76.0° |
| 2047-09-15 Sun | 0 | — | unknown | — | 50.1° 14:15 | 8.37 | 18% | 63.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2047-08-17&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.