← 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. |
|---|---|---|---|---|---|---|---|---|
| 2035-04-20 Fri | 0 | — | unknown | — | 79.1° 13:05 | 7.01 | 97% | 149.8° |
| 2035-04-21 Sat | 0 | — | unknown | — | 79.1° 13:00 | 6.96 | 100% | 155.7° |
| 2035-04-22 Sun | 0 | — | unknown | — | 79.1° 12:55 | 6.9 | 100% | 156.3° |
| 2035-04-23 Mon | 0 | — | unknown | — | 79.1° 12:50 | 6.84 | 98% | 151.3° |
| 2035-04-24 Tue | 0 | — | unknown | — | 79.1° 12:50 | 6.78 | 94% | 143.3° |
| 2035-04-25 Wed | 0 | — | unknown | — | 79.1° 12:45 | 6.72 | 90% | 133.7° |
| 2035-04-26 Thu | 0 | — | unknown | — | 79.1° 12:40 | 6.67 | 83% | 123.5° |
| 2035-04-27 Fri | 0 | — | unknown | — | 79.1° 12:35 | 6.61 | 75% | 112.9° |
| 2035-04-28 Sat | 0 | — | unknown | — | 79.1° 12:30 | 6.55 | 67% | 102.2° |
| 2035-04-29 Sun | 0 | — | unknown | — | 79.1° 12:30 | 6.49 | 57% | 91.2° |
| 2035-04-30 Mon | 0 | — | unknown | — | 79.1° 12:25 | 6.43 | 48% | 80.0° |
| 2035-05-01 Tue | 0 | — | unknown | — | 79.1° 12:20 | 6.37 | 38% | 68.6° |
| 2035-05-02 Wed | 0 | — | unknown | — | 79.1° 12:15 | 6.32 | 28% | 57.2° |
| 2035-05-03 Thu | 0 | — | unknown | — | 79.1° 12:10 | 6.26 | 19% | 45.8° |
| 2035-05-04 Fri | 0 | — | unknown | — | 79.1° 12:10 | 6.2 | 11% | 35.0° |
| 2035-05-05 Sat | 0 | — | unknown | — | 79.1° 12:05 | 6.14 | 5% | 26.4° |
| 2035-05-06 Sun | 0 | — | unknown | — | 79.1° 12:00 | 6.09 | 1% | 23.3° |
| 2035-05-07 Mon | 0 | — | unknown | — | 79.1° 11:55 | 6.03 | 0% | 28.3° |
| 2035-05-08 Tue | 0 | — | unknown | — | 79.1° 11:50 | 5.97 | 2% | 38.5° |
| 2035-05-09 Wed | 0 | — | unknown | — | 79.1° 11:45 | 5.92 | 7% | 50.9° |
| 2035-05-10 Thu | 0 | — | unknown | — | 79.1° 11:40 | 5.86 | 14% | 64.0° |
| 2035-05-11 Fri | 0 | — | unknown | — | 79.1° 11:35 | 5.81 | 23% | 77.3° |
| 2035-05-12 Sat | 0 | — | unknown | — | 79.1° 11:35 | 5.75 | 33% | 90.5° |
| 2035-05-13 Sun | 0 | — | unknown | — | 79.1° 11:30 | 5.7 | 44% | 103.3° |
| 2035-05-14 Mon | 0 | — | unknown | — | 79.1° 11:25 | 5.64 | 55% | 115.6° |
| 2035-05-15 Tue | 0 | — | unknown | — | 79.1° 11:20 | 5.59 | 66% | 127.3° |
| 2035-05-16 Wed | 0 | — | unknown | — | 79.1° 11:15 | 5.53 | 75% | 138.2° |
| 2035-05-17 Thu | 0 | — | unknown | — | 79.1° 11:15 | 5.48 | 83% | 147.7° |
| 2035-05-18 Fri | 0 | — | unknown | — | 79.1° 11:10 | 5.43 | 90% | 154.6° |
| 2035-05-19 Sat | 0 | — | unknown | — | 79.1° 11:05 | 5.38 | 95% | 156.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2035-04-20&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.