← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-07-13 Wed | 2 | — | unknown | — | 50.1° 18:25 | 4.94 | 88% | 146.7° |
| 2044-07-14 Thu | 1 | — | unknown | — | 50.1° 18:20 | 4.98 | 81% | 158.7° |
| 2044-07-15 Fri | 1 | — | unknown | — | 50.1° 18:15 | 5.03 | 72% | 169.8° |
| 2044-07-16 Sat | 1 | — | unknown | — | 50.1° 18:10 | 5.07 | 62% | 171.4° |
| 2044-07-17 Sun | 1 | — | unknown | — | 50.1° 18:10 | 5.11 | 52% | 160.4° |
| 2044-07-18 Mon | 1 | — | unknown | — | 50.1° 18:05 | 5.16 | 41% | 147.3° |
| 2044-07-19 Tue | 1 | — | unknown | — | 50.1° 18:00 | 5.21 | 30% | 133.6° |
| 2044-07-20 Wed | 1 | — | unknown | — | 50.1° 17:55 | 5.26 | 20% | 119.4° |
| 2044-07-21 Thu | 0 | — | unknown | — | 50.1° 17:50 | 5.3 | 12% | 104.8° |
| 2044-07-22 Fri | 0 | — | unknown | — | 50.1° 17:50 | 5.35 | 5% | 90.0° |
| 2044-07-23 Sat | 0 | — | unknown | — | 50.1° 17:45 | 5.4 | 1% | 75.0° |
| 2044-07-24 Sun | 0 | — | unknown | — | 50.1° 17:40 | 5.45 | 0% | 60.0° |
| 2044-07-25 Mon | 0 | — | unknown | — | 50.1° 17:35 | 5.51 | 2% | 45.2° |
| 2044-07-26 Tue | 0 | — | unknown | — | 50.1° 17:35 | 5.56 | 7% | 30.9° |
| 2044-07-27 Wed | 0 | — | unknown | — | 50.1° 17:30 | 5.61 | 14% | 17.4° |
| 2044-07-28 Thu | 0 | — | unknown | — | 50.1° 17:25 | 5.67 | 22% | 7.3° |
| 2044-07-29 Fri | 0 | — | unknown | — | 50.1° 17:20 | 5.72 | 32% | 13.0° |
| 2044-07-30 Sat | 0 | — | unknown | — | 50.1° 17:15 | 5.77 | 42% | 24.8° |
| 2044-07-31 Sun | 0 | — | unknown | — | 50.1° 17:15 | 5.83 | 52% | 36.9° |
| 2044-08-01 Mon | 0 | — | unknown | — | 50.1° 17:10 | 5.88 | 62% | 48.9° |
| 2044-08-02 Tue | 0 | — | unknown | — | 50.1° 17:05 | 5.94 | 71% | 60.8° |
| 2044-08-03 Wed | 0 | — | unknown | — | 50.1° 17:00 | 5.99 | 79% | 72.6° |
| 2044-08-04 Thu | 0 | — | unknown | — | 50.1° 16:55 | 6.05 | 86% | 84.3° |
| 2044-08-05 Fri | 0 | — | unknown | — | 50.1° 16:55 | 6.11 | 92% | 96.0° |
| 2044-08-06 Sat | 0 | — | unknown | — | 50.1° 16:50 | 6.16 | 96% | 107.8° |
| 2044-08-07 Sun | 0 | — | unknown | — | 50.1° 16:45 | 6.22 | 99% | 119.7° |
| 2044-08-08 Mon | 0 | — | unknown | — | 50.1° 16:40 | 6.28 | 100% | 131.7° |
| 2044-08-09 Tue | 0 | — | unknown | — | 50.1° 16:40 | 6.33 | 99% | 143.8° |
| 2044-08-10 Wed | 0 | — | unknown | — | 50.1° 16:35 | 6.39 | 96% | 155.8° |
| 2044-08-11 Thu | 0 | — | unknown | — | 50.1° 16:30 | 6.45 | 91% | 167.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-07-13&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.