← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-08-16 Thu | 0 | — | unknown | — | 50.1° 16:10 | 6.73 | 63% | 63.8° |
| 2040-08-17 Fri | 0 | — | unknown | — | 50.1° 16:05 | 6.79 | 73% | 78.0° |
| 2040-08-18 Sat | 0 | — | unknown | — | 50.1° 16:00 | 6.85 | 83% | 92.5° |
| 2040-08-19 Sun | 0 | — | unknown | — | 50.1° 16:00 | 6.91 | 91% | 107.3° |
| 2040-08-20 Mon | 0 | — | unknown | — | 50.1° 15:55 | 6.96 | 97% | 122.4° |
| 2040-08-21 Tue | 0 | — | unknown | — | 50.1° 15:50 | 7.02 | 100% | 137.4° |
| 2040-08-22 Wed | 0 | — | unknown | — | 50.1° 15:45 | 7.08 | 99% | 152.4° |
| 2040-08-23 Thu | 0 | — | unknown | — | 50.1° 15:45 | 7.14 | 96% | 167.1° |
| 2040-08-24 Fri | 0 | — | unknown | — | 50.1° 15:40 | 7.19 | 91% | 178.4° |
| 2040-08-25 Sat | 0 | — | unknown | — | 50.1° 15:35 | 7.25 | 84% | 164.6° |
| 2040-08-26 Sun | 0 | — | unknown | — | 50.1° 15:30 | 7.31 | 75% | 151.2° |
| 2040-08-27 Mon | 0 | — | unknown | — | 50.1° 15:25 | 7.36 | 65% | 138.2° |
| 2040-08-28 Tue | 0 | — | unknown | — | 50.1° 15:25 | 7.42 | 55% | 125.6° |
| 2040-08-29 Wed | 0 | — | unknown | — | 50.1° 15:20 | 7.48 | 46% | 113.3° |
| 2040-08-30 Thu | 0 | — | unknown | — | 50.1° 15:15 | 7.53 | 36% | 101.3° |
| 2040-08-31 Fri | 0 | — | unknown | — | 50.1° 15:10 | 7.59 | 27% | 89.4° |
| 2040-09-01 Sat | 0 | — | unknown | — | 50.1° 15:05 | 7.65 | 19% | 77.5° |
| 2040-09-02 Sun | 0 | — | unknown | — | 50.1° 15:05 | 7.7 | 12% | 65.7° |
| 2040-09-03 Mon | 0 | — | unknown | — | 50.1° 15:00 | 7.76 | 7% | 53.8° |
| 2040-09-04 Tue | 0 | — | unknown | — | 50.1° 14:55 | 7.81 | 3% | 41.9° |
| 2040-09-05 Wed | 0 | — | unknown | — | 50.1° 14:50 | 7.87 | 1% | 29.8° |
| 2040-09-06 Thu | 0 | — | unknown | — | 50.1° 14:45 | 7.92 | 0% | 17.5° |
| 2040-09-07 Fri | 0 | — | unknown | — | 50.1° 14:45 | 7.98 | 2% | 5.1° |
| 2040-09-08 Sat | 0 | — | unknown | — | 50.1° 14:40 | 8.03 | 5% | 7.6° |
| 2040-09-09 Sun | 0 | — | unknown | — | 50.1° 14:35 | 8.08 | 11% | 20.4° |
| 2040-09-10 Mon | 0 | — | unknown | — | 50.1° 14:30 | 8.14 | 18% | 33.5° |
| 2040-09-11 Tue | 0 | — | unknown | — | 50.1° 14:30 | 8.19 | 27% | 46.8° |
| 2040-09-12 Wed | 0 | — | unknown | — | 50.1° 14:25 | 8.25 | 37% | 60.3° |
| 2040-09-13 Thu | 0 | — | unknown | — | 50.1° 14:20 | 8.3 | 48% | 74.0° |
| 2040-09-14 Fri | 0 | — | unknown | — | 50.1° 14:15 | 8.35 | 60% | 88.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-08-16&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.