← 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. |
|---|---|---|---|---|---|---|---|---|
| 2034-04-29 Sat | 0 | — | unknown | — | 79.1° 12:25 | 6.48 | 89% | 142.8° |
| 2034-04-30 Sun | 0 | — | unknown | — | 79.1° 12:25 | 6.42 | 94% | 151.4° |
| 2034-05-01 Mon | 0 | — | unknown | — | 79.1° 12:20 | 6.36 | 98% | 157.0° |
| 2034-05-02 Tue | 0 | — | unknown | — | 79.1° 12:15 | 6.3 | 100% | 157.6° |
| 2034-05-03 Wed | 0 | — | unknown | — | 79.1° 12:10 | 6.24 | 100% | 152.7° |
| 2034-05-04 Thu | 0 | — | unknown | — | 79.1° 12:10 | 6.19 | 98% | 144.6° |
| 2034-05-05 Fri | 0 | — | unknown | — | 79.1° 12:00 | 6.13 | 95% | 134.9° |
| 2034-05-06 Sat | 0 | — | unknown | — | 79.1° 12:00 | 6.07 | 90% | 124.4° |
| 2034-05-07 Sun | 0 | — | unknown | — | 79.1° 11:50 | 6.02 | 83% | 113.5° |
| 2034-05-08 Mon | 0 | — | unknown | — | 79.1° 11:50 | 5.96 | 75% | 102.2° |
| 2034-05-09 Tue | 0 | — | unknown | — | 79.1° 11:45 | 5.9 | 66% | 90.6° |
| 2034-05-10 Wed | 0 | — | unknown | — | 79.1° 11:40 | 5.85 | 56% | 78.7° |
| 2034-05-11 Thu | 0 | — | unknown | — | 79.1° 11:35 | 5.79 | 45% | 66.5° |
| 2034-05-12 Fri | 0 | — | unknown | — | 79.1° 11:30 | 5.74 | 34% | 54.3° |
| 2034-05-13 Sat | 0 | — | unknown | — | 79.1° 11:30 | 5.68 | 24% | 42.2° |
| 2034-05-14 Sun | 0 | — | unknown | — | 79.1° 11:25 | 5.63 | 15% | 31.0° |
| 2034-05-15 Mon | 0 | — | unknown | — | 79.1° 11:20 | 5.57 | 7% | 23.2° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2034-04-29&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.