← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-07-08 Thu | 2 | — | unknown | — | 50.1° 18:45 | 4.73 | 42% | 1.4° |
| 2038-07-09 Fri | 1 | — | unknown | — | 50.1° 18:40 | 4.77 | 53% | 15.5° |
| 2038-07-10 Sat | 1 | — | unknown | — | 50.1° 18:35 | 4.8 | 64% | 29.7° |
| 2038-07-11 Sun | 1 | — | unknown | — | 50.1° 18:35 | 4.84 | 75% | 44.0° |
| 2038-07-12 Mon | 1 | — | unknown | — | 50.1° 18:30 | 4.88 | 84% | 58.3° |
| 2038-07-13 Tue | 1 | — | unknown | — | 50.1° 18:25 | 4.92 | 92% | 72.5° |
| 2038-07-14 Wed | 1 | — | unknown | — | 50.1° 18:20 | 4.96 | 97% | 86.6° |
| 2038-07-15 Thu | 1 | — | unknown | — | 50.1° 18:20 | 5.0 | 100% | 100.6° |
| 2038-07-16 Fri | 1 | — | unknown | — | 50.1° 18:15 | 5.05 | 100% | 114.3° |
| 2038-07-17 Sat | 1 | — | unknown | — | 50.1° 18:10 | 5.09 | 98% | 127.7° |
| 2038-07-18 Sun | 1 | — | unknown | — | 50.1° 18:05 | 5.14 | 93% | 140.7° |
| 2038-07-19 Mon | 1 | — | unknown | — | 50.1° 18:00 | 5.18 | 87% | 153.5° |
| 2038-07-20 Tue | 1 | — | unknown | — | 50.1° 18:00 | 5.23 | 80% | 165.9° |
| 2038-07-21 Wed | 1 | — | unknown | — | 50.1° 17:55 | 5.28 | 71% | 178.0° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-07-08&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.