← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-08-20 Sun | 0 | — | unknown | — | 50.1° 15:55 | 6.95 | 64% | 69.9° |
| 2045-08-21 Mon | 0 | — | unknown | — | 50.1° 15:50 | 7.01 | 74% | 82.0° |
| 2045-08-22 Tue | 0 | — | unknown | — | 50.1° 15:50 | 7.07 | 82% | 94.0° |
| 2045-08-23 Wed | 0 | — | unknown | — | 50.1° 15:45 | 7.13 | 88% | 105.8° |
| 2045-08-24 Thu | 0 | — | unknown | — | 50.1° 15:40 | 7.18 | 94% | 117.5° |
| 2045-08-25 Fri | 0 | — | unknown | — | 50.1° 15:35 | 7.24 | 98% | 129.2° |
| 2045-08-26 Sat | 0 | — | unknown | — | 50.1° 15:30 | 7.3 | 100% | 140.8° |
| 2045-08-27 Sun | 0 | — | unknown | — | 50.1° 15:30 | 7.35 | 100% | 152.2° |
| 2045-08-28 Mon | 0 | — | unknown | — | 50.1° 15:25 | 7.41 | 98% | 163.2° |
| 2045-08-29 Tue | 0 | — | unknown | — | 50.1° 15:20 | 7.47 | 95% | 171.2° |
| 2045-08-30 Wed | 0 | — | unknown | — | 50.1° 15:15 | 7.52 | 90% | 167.3° |
| 2045-08-31 Thu | 0 | — | unknown | — | 50.1° 15:10 | 7.58 | 83% | 156.7° |
| 2045-09-01 Fri | 0 | — | unknown | — | 50.1° 15:10 | 7.63 | 75% | 144.7° |
| 2045-09-02 Sat | 0 | — | unknown | — | 50.1° 15:05 | 7.69 | 66% | 132.2° |
| 2045-09-03 Sun | 0 | — | unknown | — | 50.1° 15:00 | 7.74 | 55% | 119.4° |
| 2045-09-04 Mon | 0 | — | unknown | — | 50.1° 14:55 | 7.8 | 44% | 106.1° |
| 2045-09-05 Tue | 0 | — | unknown | — | 50.1° 14:55 | 7.86 | 34% | 92.5° |
| 2045-09-06 Wed | 0 | — | unknown | — | 50.1° 14:50 | 7.91 | 23% | 78.4° |
| 2045-09-07 Thu | 0 | — | unknown | — | 50.1° 14:45 | 7.96 | 14% | 64.0° |
| 2045-09-08 Fri | 0 | — | unknown | — | 50.1° 14:40 | 8.02 | 7% | 49.3° |
| 2045-09-09 Sat | 0 | — | unknown | — | 50.1° 14:35 | 8.07 | 2% | 34.6° |
| 2045-09-10 Sun | 0 | — | unknown | — | 50.1° 14:35 | 8.13 | 0% | 20.3° |
| 2045-09-11 Mon | 0 | — | unknown | — | 50.1° 14:30 | 8.18 | 1% | 9.1° |
| 2045-09-12 Tue | 0 | — | unknown | — | 50.1° 14:25 | 8.23 | 5% | 13.9° |
| 2045-09-13 Wed | 0 | — | unknown | — | 50.1° 14:20 | 8.29 | 11% | 26.7° |
| 2045-09-14 Thu | 0 | — | unknown | — | 50.1° 14:15 | 8.34 | 20% | 40.1° |
| 2045-09-15 Fri | 0 | — | unknown | — | 50.1° 14:15 | 8.39 | 29% | 53.2° |
| 2045-09-16 Sat | 0 | — | unknown | — | 50.1° 14:10 | 8.45 | 39% | 66.0° |
| 2045-09-17 Sun | 0 | — | unknown | — | 50.1° 14:05 | 8.5 | 49% | 78.5° |
| 2045-09-18 Mon | 0 | — | unknown | — | 50.1° 14:00 | 8.55 | 58% | 90.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-08-20&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.