← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-07-04 Wed | 5 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.1° 19:00 | 4.63 | 17% | 131.2° |
| 2040-07-05 Thu | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 18:55 | 4.66 | 10% | 119.0° |
| 2040-07-06 Fri | 3 | — | unknown | 22:15–22:45 (marginal, 0.5 h) | 50.1° 18:50 | 4.69 | 5% | 107.0° |
| 2040-07-07 Sat | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:45 | 4.72 | 2% | 95.0° |
| 2040-07-08 Sun | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:45 | 4.75 | 0% | 83.2° |
| 2040-07-09 Mon | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.1° 18:40 | 4.79 | 0% | 71.4° |
| 2040-07-10 Tue | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.82 | 2% | 59.5° |
| 2040-07-11 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:30 | 4.86 | 6% | 47.7° |
| 2040-07-12 Thu | 2 | — | unknown | — | 50.1° 18:30 | 4.9 | 11% | 35.7° |
| 2040-07-13 Fri | 1 | — | unknown | — | 50.1° 18:25 | 4.94 | 18% | 23.7° |
| 2040-07-14 Sat | 1 | — | unknown | — | 50.1° 18:20 | 4.98 | 26% | 11.5° |
| 2040-07-15 Sun | 1 | — | unknown | — | 50.1° 18:15 | 5.02 | 35% | 1.1° |
| 2040-07-16 Mon | 1 | — | unknown | — | 50.1° 18:10 | 5.07 | 45% | 13.7° |
| 2040-07-17 Tue | 0 | — | unknown | — | 50.1° 18:10 | 5.11 | 56% | 26.8° |
| 2040-07-18 Wed | 0 | — | unknown | — | 50.1° 18:05 | 5.16 | 66% | 40.3° |
| 2040-07-19 Thu | 0 | — | unknown | — | 50.1° 18:00 | 5.21 | 77% | 54.3° |
| 2040-07-20 Fri | 0 | — | unknown | — | 50.1° 17:55 | 5.25 | 86% | 68.7° |
| 2040-07-21 Sat | 0 | — | unknown | — | 50.1° 17:50 | 5.3 | 93% | 83.5° |
| 2040-07-22 Sun | 0 | — | unknown | — | 50.1° 17:50 | 5.35 | 98% | 98.6° |
| 2040-07-23 Mon | 0 | — | unknown | — | 50.1° 17:45 | 5.4 | 100% | 113.8° |
| 2040-07-24 Tue | 0 | — | unknown | — | 50.1° 17:40 | 5.45 | 99% | 129.1° |
| 2040-07-25 Wed | 0 | — | unknown | — | 50.1° 17:35 | 5.5 | 95% | 144.1° |
| 2040-07-26 Thu | 0 | — | unknown | — | 50.1° 17:35 | 5.56 | 88% | 158.8° |
| 2040-07-27 Fri | 0 | — | unknown | — | 50.1° 17:30 | 5.61 | 80% | 173.1° |
| 2040-07-28 Sat | 0 | — | unknown | — | 50.1° 17:25 | 5.66 | 70% | 173.1° |
| 2040-07-29 Sun | 0 | — | unknown | — | 50.1° 17:20 | 5.72 | 60% | 159.7° |
| 2040-07-30 Mon | 0 | — | unknown | — | 50.1° 17:15 | 5.77 | 49% | 146.8° |
| 2040-07-31 Tue | 0 | — | unknown | — | 50.1° 17:15 | 5.83 | 39% | 134.2° |
| 2040-08-01 Wed | 0 | — | unknown | — | 50.1° 17:10 | 5.88 | 30% | 122.0° |
| 2040-08-02 Thu | 0 | — | unknown | — | 50.1° 17:05 | 5.94 | 22% | 109.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-07-04&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.