← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-06 Mon | 4 | 94 | 4 | 22:20–22:40 (marginal, 0.33 h) | 50.2° 18:55 | 4.67 | 59% | 172.2° |
| 2026-07-07 Tue | 3 | 84 | 3 | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:50 | 4.7 | 49% | 165.7° |
| 2026-07-08 Wed | 3 | 0 | 0 | — | 50.2° 18:45 | 4.73 | 38% | 153.1° |
| 2026-07-09 Thu | 3 | 79 | 2 | — | 50.2° 18:40 | 4.76 | 27% | 139.4° |
| 2026-07-10 Fri | 2 | 64 | 1 | — | 50.2° 18:35 | 4.8 | 17% | 125.2° |
| 2026-07-11 Sat | 2 | 100 | 2 | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:35 | 4.84 | 9% | 110.5° |
| 2026-07-12 Sun | 2 | 78 | 2 | — | 50.2° 18:30 | 4.87 | 3% | 95.7° |
| 2026-07-13 Mon | 2 | 87 | 2 | — | 50.2° 18:25 | 4.91 | 0% | 80.7° |
| 2026-07-14 Tue | 2 | 90 | 2 | — | 50.2° 18:20 | 4.96 | 0% | 65.8° |
| 2026-07-15 Wed | 1 | 20 | 0 | — | 50.2° 18:20 | 5.0 | 3% | 51.3° |
| 2026-07-16 Thu | 1 | 42 | 0 | — | 50.2° 18:15 | 5.04 | 9% | 37.1° |
| 2026-07-17 Fri | 1 | 94 | 1 | — | 50.2° 18:10 | 5.08 | 16% | 23.7° |
| 2026-07-18 Sat | 1 | 87 | 1 | — | 50.2° 18:05 | 5.13 | 25% | 11.8° |
| 2026-07-19 Sun | 0 | 91 | 0 | — | 50.2° 18:00 | 5.18 | 35% | 8.9° |
| 2026-07-20 Mon | 0 | 97 | 0 | — | 50.2° 18:00 | 5.22 | 45% | 18.5° |
| 2026-07-21 Tue | 0 | 17 | 0 | — | 50.2° 17:55 | 5.27 | 55% | 30.1° |
| 2026-07-22 Wed | 0 | 78 | 0 | — | 50.2° 17:50 | 5.32 | 64% | 41.9° |
| 2026-07-23 Thu | 0 | 0 | 0 | — | 50.2° 17:45 | 5.37 | 73% | 53.7° |
| 2026-07-24 Fri | 0 | 0 | 0 | — | 50.2° 17:40 | 5.42 | 81% | 65.4° |
| 2026-07-25 Sat | 0 | 92 | 0 | — | 50.2° 17:40 | 5.47 | 88% | 77.1° |
| 2026-07-26 Sun | 0 | 94 | 0 | — | 50.2° 17:35 | 5.52 | 93% | 88.8° |
| 2026-07-27 Mon | 0 | 97 | 0 | — | 50.2° 17:30 | 5.58 | 97% | 100.6° |
| 2026-07-28 Tue | 0 | 90 | 0 | — | 50.2° 17:25 | 5.63 | 100% | 112.6° |
| 2026-07-29 Wed | 0 | 91 | 0 | — | 50.2° 17:25 | 5.68 | 100% | 124.6° |
| 2026-07-30 Thu | 0 | 100 | 0 | — | 50.2° 17:20 | 5.74 | 98% | 136.8° |
| 2026-07-31 Fri | 0 | 98 | 0 | — | 50.2° 17:15 | 5.79 | 95% | 149.0° |
| 2026-08-01 Sat | 0 | 100 | 0 | — | 50.2° 17:10 | 5.85 | 89% | 161.1° |
| 2026-08-02 Sun | 0 | 94 | 0 | — | 50.2° 17:05 | 5.9 | 82% | 171.0° |
| 2026-08-03 Mon | 0 | 98 | 0 | — | 50.2° 17:05 | 5.96 | 73% | 168.2° |
| 2026-08-04 Tue | 0 | 92 | 0 | — | 50.2° 17:00 | 6.01 | 63% | 156.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-06&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.