← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-04-30 Tue | 0 | — | unknown | — | 79.1° 12:25 | 6.42 | 3% | 18.5° |
| 2030-05-01 Wed | 0 | — | unknown | — | 79.1° 12:20 | 6.36 | 0% | 15.9° |
| 2030-05-02 Thu | 0 | — | unknown | — | 79.1° 12:15 | 6.3 | 0% | 21.0° |
| 2030-05-03 Fri | 0 | — | unknown | — | 79.1° 12:10 | 6.25 | 2% | 30.0° |
| 2030-05-04 Sat | 0 | — | unknown | — | 79.1° 12:05 | 6.19 | 5% | 40.4° |
| 2030-05-05 Sun | 0 | — | unknown | — | 79.1° 12:00 | 6.13 | 10% | 51.4° |
| 2030-05-06 Mon | 0 | — | unknown | — | 79.1° 12:00 | 6.07 | 16% | 62.6° |
| 2030-05-07 Tue | 0 | — | unknown | — | 79.1° 11:50 | 6.02 | 24% | 74.1° |
| 2030-05-08 Wed | 0 | — | unknown | — | 79.1° 11:50 | 5.96 | 32% | 85.9° |
| 2030-05-09 Thu | 0 | — | unknown | — | 79.1° 11:45 | 5.9 | 42% | 97.8° |
| 2030-05-10 Fri | 0 | — | unknown | — | 79.1° 11:40 | 5.85 | 52% | 110.1° |
| 2030-05-11 Sat | 0 | — | unknown | — | 79.1° 11:35 | 5.79 | 63% | 122.6° |
| 2030-05-12 Sun | 0 | — | unknown | — | 79.1° 11:30 | 5.74 | 73% | 135.3° |
| 2030-05-13 Mon | 0 | — | unknown | — | 79.1° 11:30 | 5.68 | 82% | 147.9° |
| 2030-05-14 Tue | 0 | — | unknown | — | 79.1° 11:25 | 5.63 | 90% | 159.2° |
| 2030-05-15 Wed | 0 | — | unknown | — | 79.1° 11:20 | 5.58 | 96% | 164.2° |
| 2030-05-16 Thu | 0 | — | unknown | — | 79.1° 11:15 | 5.52 | 100% | 157.5° |
| 2030-05-17 Fri | 0 | — | unknown | — | 79.1° 11:10 | 5.47 | 100% | 145.2° |
| 2030-05-18 Sat | 0 | — | unknown | — | 79.1° 11:10 | 5.42 | 97% | 131.3° |
| 2030-05-19 Sun | 0 | — | unknown | — | 79.1° 11:05 | 5.37 | 91% | 117.2° |
| 2030-05-20 Mon | 0 | — | unknown | — | 79.1° 11:00 | 5.32 | 83% | 103.2° |
| 2030-05-21 Tue | 0 | — | unknown | — | 79.1° 10:55 | 5.27 | 74% | 89.5° |
| 2030-05-22 Wed | 0 | — | unknown | — | 79.1° 10:55 | 5.22 | 64% | 76.3° |
| 2030-05-23 Thu | 0 | — | unknown | — | 79.1° 10:50 | 5.17 | 53% | 63.6° |
| 2030-05-24 Fri | 0 | — | unknown | — | 79.1° 10:45 | 5.13 | 43% | 51.4° |
| 2030-05-25 Sat | 0 | — | unknown | — | 79.1° 10:40 | 5.08 | 33% | 39.8° |
| 2030-05-26 Sun | 0 | — | unknown | — | 79.1° 10:35 | 5.04 | 24% | 29.1° |
| 2030-05-27 Mon | 0 | — | unknown | — | 79.1° 10:35 | 4.99 | 16% | 20.1° |
| 2030-05-28 Tue | 0 | — | unknown | — | 79.1° 10:30 | 4.95 | 10% | 15.7° |
| 2030-05-29 Wed | 0 | — | unknown | — | 79.1° 10:25 | 4.91 | 5% | 19.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-04-30&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.