← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-07-06 Wed | 3 | — | unknown | 22:20–22:35 (marginal, 0.25 h) | 50.1° 18:55 | 4.66 | 99% | 110.8° |
| 2039-07-07 Thu | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:50 | 4.69 | 95% | 125.4° |
| 2039-07-08 Fri | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:45 | 4.73 | 89% | 139.6° |
| 2039-07-09 Sat | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:40 | 4.76 | 81% | 153.4° |
| 2039-07-10 Sun | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.1° 18:40 | 4.79 | 72% | 166.6° |
| 2039-07-11 Mon | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.83 | 62% | 179.4° |
| 2039-07-12 Tue | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:30 | 4.87 | 52% | 168.0° |
| 2039-07-13 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:25 | 4.91 | 42% | 155.7° |
| 2039-07-14 Thu | 2 | — | unknown | 22:10–22:15 (marginal, 0.08 h) | 50.1° 18:25 | 4.95 | 33% | 143.7° |
| 2039-07-15 Fri | 1 | — | unknown | — | 50.1° 18:20 | 4.99 | 24% | 131.8° |
| 2039-07-16 Sat | 1 | — | unknown | — | 50.1° 18:15 | 5.03 | 17% | 120.0° |
| 2039-07-17 Sun | 1 | — | unknown | — | 50.1° 18:10 | 5.08 | 10% | 108.2° |
| 2039-07-18 Mon | 1 | — | unknown | — | 50.1° 18:05 | 5.12 | 5% | 96.3° |
| 2039-07-19 Tue | 1 | — | unknown | — | 50.1° 18:05 | 5.17 | 2% | 84.3° |
| 2039-07-20 Wed | 1 | — | unknown | — | 50.1° 18:00 | 5.22 | 0% | 72.1° |
| 2039-07-21 Thu | 1 | — | unknown | — | 50.1° 17:55 | 5.27 | 0% | 59.8° |
| 2039-07-22 Fri | 0 | — | unknown | — | 50.1° 17:50 | 5.31 | 3% | 47.3° |
| 2039-07-23 Sat | 0 | — | unknown | — | 50.1° 17:45 | 5.36 | 7% | 34.6° |
| 2039-07-24 Sun | 0 | — | unknown | — | 50.1° 17:45 | 5.41 | 13% | 21.7° |
| 2039-07-25 Mon | 0 | — | unknown | — | 50.1° 17:40 | 5.47 | 21% | 8.5° |
| 2039-07-26 Tue | 0 | — | unknown | — | 50.1° 17:35 | 5.52 | 30% | 4.8° |
| 2039-07-27 Wed | 0 | — | unknown | — | 50.1° 17:30 | 5.57 | 41% | 18.4° |
| 2039-07-28 Thu | 0 | — | unknown | — | 50.1° 17:30 | 5.62 | 52% | 32.3° |
| 2039-07-29 Fri | 0 | — | unknown | — | 50.1° 17:25 | 5.68 | 64% | 46.4° |
| 2039-07-30 Sat | 0 | — | unknown | — | 50.1° 17:20 | 5.73 | 74% | 60.8° |
| 2039-07-31 Sun | 0 | — | unknown | — | 50.1° 17:15 | 5.78 | 84% | 75.3° |
| 2039-08-01 Mon | 0 | — | unknown | — | 50.1° 17:10 | 5.84 | 92% | 90.0° |
| 2039-08-02 Tue | 0 | — | unknown | — | 50.1° 17:10 | 5.89 | 97% | 104.7° |
| 2039-08-03 Wed | 0 | — | unknown | — | 50.1° 17:05 | 5.95 | 100% | 119.3° |
| 2039-08-04 Thu | 0 | — | unknown | — | 50.1° 17:00 | 6.01 | 100% | 133.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-07-06&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.