← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-06-18 Thu | 0 | 0 | 0 | — | 42.9° 13:10 | 4.43 | 20% | 62.5° |
| 2026-06-19 Fri | 0 | 0 | 0 | — | 42.9° 13:05 | 4.42 | 30% | 73.7° |
| 2026-06-20 Sat | 0 | 0 | 0 | — | 42.9° 13:05 | 4.42 | 40% | 84.8° |
| 2026-06-21 Sun | 0 | 0 | 0 | — | 42.9° 13:00 | 4.42 | 50% | 95.6° |
| 2026-06-22 Mon | 0 | 0 | 0 | — | 42.9° 12:55 | 4.42 | 60% | 106.1° |
| 2026-06-23 Tue | 0 | 0 | 0 | — | 42.9° 12:50 | 4.43 | 70% | 116.0° |
| 2026-06-24 Wed | 0 | 0 | 0 | — | 42.9° 12:45 | 4.43 | 78% | 125.3° |
| 2026-06-25 Thu | 0 | 0 | 0 | — | 42.9° 12:45 | 4.44 | 86% | 133.7° |
| 2026-06-26 Fri | 0 | 0 | 0 | — | 42.9° 12:40 | 4.45 | 92% | 140.6° |
| 2026-06-27 Sat | 0 | 0 | 0 | — | 42.9° 12:35 | 4.47 | 96% | 145.2° |
| 2026-06-28 Sun | 0 | 0 | 0 | — | 42.9° 12:30 | 4.48 | 99% | 146.6° |
| 2026-06-29 Mon | 0 | 0 | 0 | — | 42.9° 12:30 | 4.5 | 100% | 144.4° |
| 2026-06-30 Tue | 0 | 0 | 0 | — | 42.9° 12:25 | 4.52 | 99% | 139.1° |
| 2026-07-01 Wed | 0 | 0 | 0 | — | 42.9° 12:20 | 4.54 | 96% | 131.7° |
| 2026-07-02 Thu | 0 | 0 | 0 | — | 42.9° 12:15 | 4.56 | 92% | 123.0° |
| 2026-07-03 Fri | 0 | 0 | 0 | — | 42.9° 12:10 | 4.58 | 86% | 113.4° |
| 2026-07-04 Sat | 0 | 0 | 0 | — | 42.9° 12:10 | 4.61 | 78% | 103.2° |
| 2026-07-05 Sun | 0 | 0 | 0 | — | 42.9° 12:00 | 4.64 | 70% | 92.6° |
| 2026-07-06 Mon | 0 | 0 | 0 | — | 42.9° 12:00 | 4.67 | 59% | 81.7° |
| 2026-07-07 Tue | 0 | 0 | 0 | — | 42.9° 11:50 | 4.7 | 49% | 70.7° |
| 2026-07-08 Wed | 0 | 0 | 0 | — | 42.9° 11:50 | 4.73 | 38% | 59.8° |
| 2026-07-09 Thu | 0 | 0 | 0 | — | 42.9° 11:45 | 4.76 | 27% | 49.5° |
| 2026-07-10 Fri | 0 | 0 | 0 | — | 42.9° 11:40 | 4.8 | 17% | 40.5° |
| 2026-07-11 Sat | 0 | 0 | 0 | — | 42.9° 11:35 | 4.84 | 9% | 34.6° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-06-18&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.