← 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. |
|---|---|---|---|---|---|---|---|---|
| 2034-05-16 Tue | 0 | — | unknown | — | 79.1° 11:15 | 5.52 | 2% | 23.2° |
| 2034-05-17 Wed | 0 | — | unknown | — | 79.1° 11:10 | 5.47 | 0% | 31.2° |
| 2034-05-18 Thu | 0 | — | unknown | — | 79.1° 11:10 | 5.42 | 1% | 42.9° |
| 2034-05-19 Fri | 0 | — | unknown | — | 79.1° 11:05 | 5.37 | 5% | 55.9° |
| 2034-05-20 Sat | 0 | — | unknown | — | 79.1° 11:00 | 5.32 | 11% | 69.1° |
| 2034-05-21 Sun | 0 | — | unknown | — | 79.1° 10:55 | 5.27 | 20% | 82.2° |
| 2034-05-22 Mon | 0 | — | unknown | — | 79.1° 10:55 | 5.22 | 29% | 94.9° |
| 2034-05-23 Tue | 0 | — | unknown | — | 79.1° 10:50 | 5.17 | 39% | 107.1° |
| 2034-05-24 Wed | 0 | — | unknown | — | 79.1° 10:45 | 5.13 | 49% | 118.8° |
| 2034-05-25 Thu | 0 | — | unknown | — | 79.1° 10:40 | 5.08 | 59% | 129.9° |
| 2034-05-26 Fri | 0 | — | unknown | — | 79.1° 10:35 | 5.04 | 69% | 140.2° |
| 2034-05-27 Sat | 0 | — | unknown | — | 79.1° 10:35 | 4.99 | 77% | 149.3° |
| 2034-05-28 Sun | 0 | — | unknown | — | 79.1° 10:30 | 4.95 | 85% | 155.9° |
| 2034-05-29 Mon | 0 | — | unknown | — | 79.1° 10:25 | 4.91 | 91% | 157.9° |
| 2034-05-30 Tue | 1 | — | unknown | — | 79.1° 10:20 | 4.87 | 95% | 154.3° |
| 2034-05-31 Wed | 1 | — | unknown | — | 79.1° 10:15 | 4.83 | 98% | 146.8° |
| 2034-06-01 Thu | 1 | — | unknown | — | 79.1° 10:15 | 4.79 | 100% | 137.5° |
| 2034-06-02 Fri | 1 | — | unknown | — | 79.1° 10:10 | 4.76 | 99% | 127.1° |
| 2034-06-03 Sat | 1 | — | unknown | — | 79.1° 10:05 | 4.72 | 97% | 116.2° |
| 2034-06-04 Sun | 1 | — | unknown | — | 79.1° 10:00 | 4.69 | 93% | 104.9° |
| 2034-06-05 Mon | 1 | — | unknown | — | 79.1° 10:00 | 4.66 | 87% | 93.3° |
| 2034-06-06 Tue | 1 | — | unknown | — | 79.1° 09:55 | 4.63 | 79% | 81.6° |
| 2034-06-07 Wed | 1 | — | unknown | — | 79.1° 09:50 | 4.61 | 70% | 69.6° |
| 2034-06-08 Thu | 1 | — | unknown | — | 79.1° 09:45 | 4.58 | 60% | 57.6° |
| 2034-06-09 Fri | 1 | — | unknown | — | 79.1° 09:40 | 4.56 | 49% | 45.8° |
| 2034-06-10 Sat | 2 | — | unknown | — | 79.1° 09:40 | 4.53 | 38% | 34.6° |
| 2034-06-11 Sun | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:35 | 4.51 | 27% | 25.5° |
| 2034-06-12 Mon | 4 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:30 | 4.5 | 17% | 22.2° |
| 2034-06-13 Tue | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.1° 09:25 | 4.48 | 9% | 27.3° |
| 2034-06-14 Wed | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.1° 09:20 | 4.47 | 4% | 37.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2034-05-16&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.