← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-12 Sun | 0 | 0 | 0 | — | 42.9° 11:35 | 4.87 | 3% | 33.8° |
| 2026-07-13 Mon | 0 | 0 | 0 | — | 42.9° 11:30 | 4.91 | 0% | 38.6° |
| 2026-07-14 Tue | 0 | 0 | 0 | — | 42.9° 11:25 | 4.96 | 0% | 47.3° |
| 2026-07-15 Wed | 0 | 0 | 0 | — | 42.9° 11:20 | 5.0 | 3% | 57.8° |
| 2026-07-16 Thu | 0 | 0 | 0 | — | 42.9° 11:15 | 5.04 | 9% | 69.2° |
| 2026-07-17 Fri | 0 | 0 | 0 | — | 42.9° 11:15 | 5.08 | 16% | 80.6° |
| 2026-07-18 Sat | 0 | 0 | 0 | — | 42.9° 11:10 | 5.13 | 25% | 91.9° |
| 2026-07-19 Sun | 0 | 0 | 0 | — | 42.9° 11:05 | 5.18 | 35% | 102.8° |
| 2026-07-20 Mon | 0 | 0 | 0 | — | 42.9° 11:00 | 5.22 | 45% | 113.1° |
| 2026-07-21 Tue | 0 | 0 | 0 | — | 42.9° 10:55 | 5.27 | 55% | 122.7° |
| 2026-07-22 Wed | 0 | 0 | 0 | — | 42.9° 10:55 | 5.32 | 64% | 131.4° |
| 2026-07-23 Thu | 0 | 0 | 0 | — | 42.9° 10:50 | 5.37 | 73% | 138.8° |
| 2026-07-24 Fri | 0 | 0 | 0 | — | 42.9° 10:45 | 5.42 | 81% | 144.1° |
| 2026-07-25 Sat | 0 | 0 | 0 | — | 42.9° 10:40 | 5.47 | 88% | 146.5° |
| 2026-07-26 Sun | 0 | 0 | 0 | — | 42.9° 10:40 | 5.52 | 93% | 145.3° |
| 2026-07-27 Mon | 0 | 0 | 0 | — | 42.9° 10:35 | 5.58 | 97% | 140.7° |
| 2026-07-28 Tue | 0 | 0 | 0 | — | 42.9° 10:30 | 5.63 | 100% | 133.8° |
| 2026-07-29 Wed | 0 | 0 | 0 | — | 42.9° 10:25 | 5.68 | 100% | 125.3° |
| 2026-07-30 Thu | 0 | 0 | 0 | — | 42.9° 10:20 | 5.74 | 98% | 115.8° |
| 2026-07-31 Fri | 0 | 0 | 0 | — | 42.9° 10:20 | 5.79 | 95% | 105.7° |
| 2026-08-01 Sat | 0 | 0 | 0 | — | 42.9° 10:15 | 5.85 | 89% | 95.1° |
| 2026-08-02 Sun | 0 | 0 | 0 | — | 42.9° 10:10 | 5.9 | 82% | 84.3° |
| 2026-08-03 Mon | 0 | 0 | 0 | — | 42.9° 10:05 | 5.96 | 73% | 73.4° |
| 2026-08-04 Tue | 0 | 0 | 0 | — | 42.9° 10:00 | 6.01 | 63% | 62.6° |
| 2026-08-05 Wed | 0 | 0 | 0 | — | 42.9° 10:00 | 6.07 | 52% | 52.3° |
| 2026-08-06 Thu | 0 | 0 | 0 | — | 42.9° 09:55 | 6.13 | 40% | 43.1° |
| 2026-08-07 Fri | 0 | 0 | 0 | — | 42.9° 09:50 | 6.18 | 30% | 36.2° |
| 2026-08-08 Sat | 0 | 0 | 0 | — | 42.9° 09:45 | 6.24 | 19% | 33.5° |
| 2026-08-09 Sun | 0 | 0 | 0 | — | 42.9° 09:45 | 6.3 | 11% | 36.2° |
| 2026-08-10 Mon | 0 | 0 | 0 | — | 42.9° 09:40 | 6.35 | 5% | 43.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-12&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.