← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-07-22 Thu | 0 | — | unknown | — | 50.1° 17:50 | 5.33 | 62% | 169.9° |
| 2038-07-23 Fri | 0 | — | unknown | — | 50.1° 17:45 | 5.38 | 53% | 158.1° |
| 2038-07-24 Sat | 0 | — | unknown | — | 50.1° 17:40 | 5.43 | 43% | 146.2° |
| 2038-07-25 Sun | 0 | — | unknown | — | 50.1° 17:40 | 5.48 | 34% | 134.3° |
| 2038-07-26 Mon | 0 | — | unknown | — | 50.1° 17:35 | 5.53 | 25% | 122.3° |
| 2038-07-27 Tue | 0 | — | unknown | — | 50.1° 17:30 | 5.58 | 17% | 110.0° |
| 2038-07-28 Wed | 0 | — | unknown | — | 50.1° 17:25 | 5.64 | 10% | 97.5° |
| 2038-07-29 Thu | 0 | — | unknown | — | 50.1° 17:25 | 5.69 | 5% | 84.7° |
| 2038-07-30 Fri | 0 | — | unknown | — | 50.1° 17:20 | 5.74 | 1% | 71.6° |
| 2038-07-31 Sat | 0 | — | unknown | — | 50.1° 17:15 | 5.8 | 0% | 58.1° |
| 2038-08-01 Sun | 0 | — | unknown | — | 50.1° 17:10 | 5.85 | 1% | 44.4° |
| 2038-08-02 Mon | 0 | — | unknown | — | 50.1° 17:05 | 5.91 | 5% | 30.4° |
| 2038-08-03 Tue | 0 | — | unknown | — | 50.1° 17:05 | 5.96 | 11% | 16.3° |
| 2038-08-04 Wed | 0 | — | unknown | — | 50.1° 17:00 | 6.02 | 19% | 2.1° |
| 2038-08-05 Thu | 0 | — | unknown | — | 50.1° 16:55 | 6.08 | 29% | 12.2° |
| 2038-08-06 Fri | 0 | — | unknown | — | 50.1° 16:50 | 6.13 | 40% | 26.5° |
| 2038-08-07 Sat | 0 | — | unknown | — | 50.1° 16:45 | 6.19 | 51% | 40.7° |
| 2038-08-08 Sun | 0 | — | unknown | — | 50.1° 16:45 | 6.25 | 62% | 54.8° |
| 2038-08-09 Mon | 0 | — | unknown | — | 50.1° 16:40 | 6.3 | 73% | 68.8° |
| 2038-08-10 Tue | 0 | — | unknown | — | 50.1° 16:35 | 6.36 | 82% | 82.6° |
| 2038-08-11 Wed | 0 | — | unknown | — | 50.1° 16:30 | 6.42 | 90% | 96.3° |
| 2038-08-12 Thu | 0 | — | unknown | — | 50.1° 16:30 | 6.47 | 95% | 109.8° |
| 2038-08-13 Fri | 0 | — | unknown | — | 50.1° 16:25 | 6.53 | 99% | 123.1° |
| 2038-08-14 Sat | 0 | — | unknown | — | 50.1° 16:20 | 6.59 | 100% | 136.2° |
| 2038-08-15 Sun | 0 | — | unknown | — | 50.1° 16:15 | 6.65 | 99% | 149.0° |
| 2038-08-16 Mon | 0 | — | unknown | — | 50.1° 16:10 | 6.7 | 96% | 161.6° |
| 2038-08-17 Tue | 0 | — | unknown | — | 50.1° 16:10 | 6.76 | 91% | 173.9° |
| 2038-08-18 Wed | 0 | — | unknown | — | 50.1° 16:05 | 6.82 | 85% | 174.0° |
| 2038-08-19 Thu | 0 | — | unknown | — | 50.1° 16:00 | 6.88 | 77% | 162.0° |
| 2038-08-20 Fri | 0 | — | unknown | — | 50.1° 15:55 | 6.94 | 69% | 150.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-07-22&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.