← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-09-14 Tue | 0 | — | unknown | — | 50.1° 14:20 | 8.32 | 98% | 177.7° |
| 2038-09-15 Wed | 0 | — | unknown | — | 50.1° 14:15 | 8.38 | 94% | 165.7° |
| 2038-09-16 Thu | 0 | — | unknown | — | 50.1° 14:10 | 8.43 | 89% | 153.8° |
| 2038-09-17 Fri | 0 | — | unknown | — | 50.1° 14:05 | 8.48 | 83% | 142.0° |
| 2038-09-18 Sat | 0 | — | unknown | — | 50.1° 14:00 | 8.53 | 75% | 130.2° |
| 2038-09-19 Sun | 0 | — | unknown | — | 50.1° 14:00 | 8.59 | 67% | 118.3° |
| 2038-09-20 Mon | 0 | — | unknown | — | 50.1° 13:55 | 8.64 | 57% | 106.3° |
| 2038-09-21 Tue | 0 | — | unknown | — | 50.1° 13:50 | 8.69 | 48% | 94.1° |
| 2038-09-22 Wed | 0 | — | unknown | — | 50.1° 13:45 | 8.74 | 38% | 81.7° |
| 2038-09-23 Thu | 0 | — | unknown | — | 50.1° 13:45 | 8.79 | 28% | 68.8° |
| 2038-09-24 Fri | 0 | — | unknown | — | 50.1° 13:40 | 8.84 | 19% | 55.5° |
| 2038-09-25 Sat | 0 | — | unknown | — | 50.1° 13:35 | 8.89 | 11% | 41.8° |
| 2038-09-26 Sun | 0 | — | unknown | — | 50.1° 13:30 | 8.94 | 5% | 27.6° |
| 2038-09-27 Mon | 0 | — | unknown | — | 50.1° 13:25 | 8.99 | 1% | 13.0° |
| 2038-09-28 Tue | 0 | — | unknown | — | 50.1° 13:25 | 9.04 | 0% | 1.9° |
| 2038-09-29 Wed | 0 | — | unknown | — | 50.1° 13:20 | 9.09 | 2% | 16.9° |
| 2038-09-30 Thu | 0 | — | unknown | — | 50.1° 13:15 | 9.14 | 7% | 32.0° |
| 2038-10-01 Fri | 0 | — | unknown | — | 50.1° 13:10 | 9.18 | 14% | 46.9° |
| 2038-10-02 Sat | 0 | — | unknown | — | 50.1° 13:05 | 9.23 | 23% | 61.6° |
| 2038-10-03 Sun | 0 | — | unknown | — | 50.1° 13:05 | 9.28 | 34% | 75.9° |
| 2038-10-04 Mon | 0 | — | unknown | — | 50.1° 13:00 | 9.33 | 45% | 89.8° |
| 2038-10-05 Tue | 0 | — | unknown | — | 50.1° 12:55 | 9.37 | 56% | 103.3° |
| 2038-10-06 Wed | 0 | — | unknown | — | 50.1° 12:50 | 9.42 | 66% | 116.5° |
| 2038-10-07 Thu | 0 | — | unknown | — | 50.1° 12:50 | 9.47 | 75% | 129.4° |
| 2038-10-08 Fri | 0 | — | unknown | — | 50.1° 12:45 | 9.51 | 83% | 142.1° |
| 2038-10-09 Sat | 0 | — | unknown | — | 50.1° 12:40 | 9.56 | 90% | 154.5° |
| 2038-10-10 Sun | 0 | — | unknown | — | 50.1° 12:35 | 9.6 | 95% | 166.8° |
| 2038-10-11 Mon | 0 | — | unknown | — | 50.1° 12:30 | 9.65 | 98% | 178.9° |
| 2038-10-12 Tue | 0 | — | unknown | — | 50.1° 12:30 | 9.69 | 100% | 169.1° |
| 2038-10-13 Wed | 0 | — | unknown | — | 50.1° 12:25 | 9.74 | 99% | 157.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-09-14&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.