← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-06-23 Sun | 0 | — | unknown | — | 72.5° 11:00 | 4.43 | 38% | 43.4° |
| 2030-06-24 Mon | 0 | — | unknown | — | 72.5° 10:55 | 4.44 | 29% | 31.3° |
| 2030-06-25 Tue | 0 | — | unknown | — | 72.5° 10:50 | 4.44 | 21% | 19.5° |
| 2030-06-26 Wed | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 14% | 7.9° |
| 2030-06-27 Thu | 0 | — | unknown | — | 72.5° 10:45 | 4.47 | 8% | 5.1° |
| 2030-06-28 Fri | 0 | — | unknown | — | 72.5° 10:40 | 4.48 | 4% | 16.4° |
| 2030-06-29 Sat | 0 | — | unknown | — | 72.5° 10:35 | 4.5 | 1% | 28.2° |
| 2030-06-30 Sun | 0 | — | unknown | — | 72.5° 10:30 | 4.52 | 0% | 40.2° |
| 2030-07-01 Mon | 0 | — | unknown | — | 72.5° 10:30 | 4.54 | 1% | 52.4° |
| 2030-07-02 Tue | 0 | — | unknown | — | 72.5° 10:25 | 4.56 | 4% | 64.7° |
| 2030-07-03 Wed | 0 | — | unknown | — | 72.5° 10:20 | 4.58 | 9% | 77.2° |
| 2030-07-04 Thu | 0 | — | unknown | — | 72.5° 10:15 | 4.61 | 16% | 90.0° |
| 2030-07-05 Fri | 0 | — | unknown | — | 72.5° 10:10 | 4.64 | 24% | 102.9° |
| 2030-07-06 Sat | 0 | — | unknown | — | 72.5° 10:10 | 4.67 | 34% | 116.1° |
| 2030-07-07 Sun | 1 | — | unknown | — | 72.5° 10:05 | 4.7 | 44% | 129.6° |
| 2030-07-08 Mon | 1 | — | unknown | — | 72.5° 10:00 | 4.73 | 55% | 143.3° |
| 2030-07-09 Tue | 1 | — | unknown | — | 72.5° 09:55 | 4.77 | 66% | 157.3° |
| 2030-07-10 Wed | 1 | — | unknown | — | 72.5° 09:50 | 4.8 | 77% | 171.5° |
| 2030-07-11 Thu | 2 | — | unknown | — | 72.5° 09:50 | 4.84 | 86% | 172.9° |
| 2030-07-12 Fri | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:45 | 4.88 | 93% | 158.5° |
| 2030-07-13 Sat | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:40 | 4.92 | 98% | 143.7° |
| 2030-07-14 Sun | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:35 | 4.96 | 100% | 128.9° |
| 2030-07-15 Mon | 2 | — | unknown | 04:40–04:50 (marginal, 0.17 h) | 72.5° 09:35 | 5.0 | 99% | 114.4° |
| 2030-07-16 Tue | 2 | — | unknown | 03:55–04:00 (marginal, 0.08 h) | 72.5° 09:30 | 5.04 | 95% | 100.1° |
| 2030-07-17 Wed | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.5° 09:25 | 5.09 | 89% | 86.3° |
| 2030-07-18 Thu | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.5° 09:20 | 5.13 | 82% | 72.9° |
| 2030-07-19 Fri | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.5° 09:15 | 5.18 | 73% | 59.9° |
| 2030-07-20 Sat | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:15 | 5.23 | 64% | 47.3° |
| 2030-07-21 Sun | 5 | — | unknown | 03:45–04:10 (marginal, 0.42 h) | 72.5° 09:10 | 5.27 | 54% | 35.0° |
| 2030-07-22 Mon | 6 | — | unknown | 03:35–04:10 (marginal, 0.58 h) | 72.5° 09:05 | 5.32 | 44% | 23.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-06-23&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.