← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-05-25 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° |
| 2030-05-30 Thu | 1 | — | unknown | — | 79.1° 10:20 | 4.87 | 2% | 27.6° |
| 2030-05-31 Fri | 1 | — | unknown | — | 79.1° 10:15 | 4.83 | 0% | 37.8° |
| 2030-06-01 Sat | 1 | — | unknown | — | 79.1° 10:15 | 4.79 | 0% | 48.6° |
| 2030-06-02 Sun | 1 | — | unknown | — | 79.1° 10:10 | 4.76 | 2% | 59.9° |
| 2030-06-03 Mon | 1 | — | unknown | — | 79.1° 10:05 | 4.73 | 6% | 71.3° |
| 2030-06-04 Tue | 1 | — | unknown | — | 79.1° 10:00 | 4.69 | 12% | 83.0° |
| 2030-06-05 Wed | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.1° 10:00 | 4.66 | 19% | 94.8° |
| 2030-06-06 Thu | 2 | — | unknown | 04:25–04:35 (marginal, 0.17 h) | 79.1° 09:55 | 4.63 | 28% | 106.9° |
| 2030-06-07 Fri | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.1° 09:50 | 4.61 | 37% | 119.1° |
| 2030-06-08 Sat | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:45 | 4.58 | 48% | 131.4° |
| 2030-06-09 Sun | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:40 | 4.56 | 58% | 143.8° |
| 2030-06-10 Mon | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:40 | 4.53 | 69% | 155.4° |
| 2030-06-11 Tue | 3 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:35 | 4.51 | 79% | 163.6° |
| 2030-06-12 Wed | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:30 | 4.5 | 88% | 161.6° |
| 2030-06-13 Thu | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:25 | 4.48 | 95% | 151.0° |
| 2030-06-14 Fri | 5 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:20 | 4.46 | 99% | 137.6° |
| 2030-06-15 Sat | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.1° 09:20 | 4.45 | 100% | 123.5° |
| 2030-06-16 Sun | 5 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:15 | 4.44 | 98% | 109.2° |
| 2030-06-17 Mon | 5 | — | unknown | 03:15–03:40 (marginal, 0.42 h) | 79.1° 09:10 | 4.43 | 93% | 95.0° |
| 2030-06-18 Tue | 5 | — | unknown | 03:15–03:40 (marginal, 0.42 h) | 79.1° 09:05 | 4.43 | 86% | 81.3° |
| 2030-06-19 Wed | 5 | — | unknown | 03:10–03:40 (marginal, 0.5 h) | 79.1° 09:05 | 4.42 | 78% | 68.0° |
| 2030-06-20 Thu | 5 | — | unknown | 03:10–03:40 (marginal, 0.5 h) | 79.1° 09:00 | 4.42 | 68% | 55.2° |
| 2030-06-21 Fri | 6 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.1° 08:55 | 4.42 | 58% | 43.2° |
| 2030-06-22 Sat | 8 | — | unknown | 02:55–03:40 (marginal, 0.75 h) | 79.1° 08:50 | 4.42 | 48% | 31.9° |
| 2030-06-23 Sun | 10 | — | unknown | 02:50–04:30 (marginal, 1.67 h) | 79.1° 08:45 | 4.43 | 38% | 22.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-05-25&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.