← 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. |
|---|---|---|---|---|---|---|---|---|
| 2029-05-11 Fri | 0 | — | unknown | — | 79.1° 11:35 | 5.78 | 3% | 14.8° |
| 2029-05-12 Sat | 0 | — | unknown | — | 79.1° 11:30 | 5.72 | 0% | 19.4° |
| 2029-05-13 Sun | 0 | — | unknown | — | 79.1° 11:25 | 5.67 | 0% | 28.6° |
| 2029-05-14 Mon | 0 | — | unknown | — | 79.1° 11:25 | 5.62 | 2% | 39.5° |
| 2029-05-15 Tue | 0 | — | unknown | — | 79.1° 11:20 | 5.56 | 5% | 51.0° |
| 2029-05-16 Wed | 0 | — | unknown | — | 79.1° 11:15 | 5.51 | 11% | 63.0° |
| 2029-05-17 Thu | 0 | — | unknown | — | 79.1° 11:10 | 5.46 | 18% | 75.3° |
| 2029-05-18 Fri | 0 | — | unknown | — | 79.1° 11:05 | 5.41 | 26% | 87.8° |
| 2029-05-19 Sat | 0 | — | unknown | — | 79.1° 11:05 | 5.36 | 36% | 100.7° |
| 2029-05-20 Sun | 0 | — | unknown | — | 79.1° 11:00 | 5.31 | 47% | 113.7° |
| 2029-05-21 Mon | 0 | — | unknown | — | 79.1° 10:55 | 5.26 | 58% | 127.0° |
| 2029-05-22 Tue | 0 | — | unknown | — | 79.1° 10:50 | 5.21 | 70% | 140.3° |
| 2029-05-23 Wed | 0 | — | unknown | — | 79.1° 10:50 | 5.16 | 80% | 153.0° |
| 2029-05-24 Thu | 0 | — | unknown | — | 79.1° 10:45 | 5.11 | 88% | 163.2° |
| 2029-05-25 Fri | 0 | — | unknown | — | 79.1° 10:40 | 5.07 | 95% | 163.8° |
| 2029-05-26 Sat | 0 | — | unknown | — | 79.1° 10:35 | 5.03 | 99% | 154.0° |
| 2029-05-27 Sun | 0 | — | unknown | — | 79.1° 10:30 | 4.98 | 100% | 141.1° |
| 2029-05-28 Mon | 0 | — | unknown | — | 79.1° 10:30 | 4.94 | 98% | 127.5° |
| 2029-05-29 Tue | 0 | — | unknown | — | 79.1° 10:25 | 4.9 | 94% | 114.0° |
| 2029-05-30 Wed | 0 | — | unknown | — | 79.1° 10:20 | 4.86 | 88% | 100.8° |
| 2029-05-31 Thu | 0 | — | unknown | — | 79.1° 10:15 | 4.82 | 80% | 87.9° |
| 2029-06-01 Fri | 1 | — | unknown | — | 79.1° 10:10 | 4.79 | 70% | 75.5° |
| 2029-06-02 Sat | 1 | — | unknown | — | 79.1° 10:10 | 4.75 | 61% | 63.4° |
| 2029-06-03 Sun | 1 | — | unknown | — | 79.1° 10:05 | 4.72 | 51% | 51.8° |
| 2029-06-04 Mon | 1 | — | unknown | — | 79.1° 10:00 | 4.68 | 42% | 40.5° |
| 2029-06-05 Tue | 1 | — | unknown | — | 79.1° 09:55 | 4.65 | 32% | 29.9° |
| 2029-06-06 Wed | 1 | — | unknown | — | 79.1° 09:55 | 4.63 | 24% | 20.6° |
| 2029-06-07 Thu | 2 | — | unknown | — | 79.1° 09:50 | 4.6 | 16% | 15.0° |
| 2029-06-08 Fri | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:45 | 4.57 | 10% | 17.4° |
| 2029-06-09 Sat | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:40 | 4.55 | 5% | 25.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2029-05-11&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.