← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-06-20 Tue | 22 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.2° 19:55 | 4.42 | 4% | 118.7° |
| 2028-06-21 Wed | 20 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.2° 19:50 | 4.42 | 1% | 105.3° |
| 2028-06-22 Thu | 18 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.2° 19:45 | 4.43 | 0% | 91.6° |
| 2028-06-23 Fri | 16 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:40 | 4.43 | 2% | 77.6° |
| 2028-06-24 Sat | 15 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.2° 19:40 | 4.44 | 6% | 63.5° |
| 2028-06-25 Sun | 13 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.2° 19:35 | 4.45 | 13% | 49.3° |
| 2028-06-26 Mon | 10 | — | unknown | 22:20–23:50 (marginal, 1.5 h) | 50.2° 19:30 | 4.46 | 22% | 35.3° |
| 2028-06-27 Tue | 8 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.2° 19:25 | 4.47 | 32% | 21.9° |
| 2028-06-28 Wed | 7 | — | unknown | 23:10–23:45 (marginal, 0.58 h) | 50.2° 19:20 | 4.49 | 43% | 11.2° |
| 2028-06-29 Thu | 5 | — | unknown | 23:10–23:40 (marginal, 0.5 h) | 50.2° 19:20 | 4.51 | 55% | 13.0° |
| 2028-06-30 Fri | 3 | — | unknown | 23:10–23:25 (marginal, 0.25 h) | 50.2° 19:15 | 4.53 | 66% | 24.5° |
| 2028-07-01 Sat | 3 | — | unknown | 23:10–23:20 (marginal, 0.17 h) | 50.2° 19:10 | 4.55 | 76% | 37.4° |
| 2028-07-02 Sun | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.2° 19:05 | 4.57 | 85% | 50.5° |
| 2028-07-03 Mon | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.2° 19:05 | 4.6 | 92% | 63.5° |
| 2028-07-04 Tue | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.2° 19:00 | 4.62 | 96% | 76.4° |
| 2028-07-05 Wed | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.2° 18:55 | 4.65 | 99% | 89.1° |
| 2028-07-06 Thu | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:50 | 4.68 | 100% | 101.5° |
| 2028-07-07 Fri | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.2° 18:45 | 4.71 | 99% | 113.8° |
| 2028-07-08 Sat | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.2° 18:45 | 4.75 | 95% | 125.8° |
| 2028-07-09 Sun | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.2° 18:40 | 4.78 | 90% | 137.5° |
| 2028-07-10 Mon | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:35 | 4.82 | 84% | 149.0° |
| 2028-07-11 Tue | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:30 | 4.86 | 77% | 159.8° |
| 2028-07-12 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:25 | 4.9 | 68% | 168.6° |
| 2028-07-13 Thu | 2 | — | unknown | — | 50.2° 18:25 | 4.94 | 59% | 168.5° |
| 2028-07-14 Fri | 1 | — | unknown | — | 50.2° 18:20 | 4.98 | 49% | 159.6° |
| 2028-07-15 Sat | 1 | — | unknown | — | 50.2° 18:15 | 5.02 | 40% | 148.3° |
| 2028-07-16 Sun | 1 | — | unknown | — | 50.2° 18:10 | 5.06 | 30% | 136.3° |
| 2028-07-17 Mon | 1 | — | unknown | — | 50.2° 18:10 | 5.11 | 21% | 123.8° |
| 2028-07-18 Tue | 1 | — | unknown | — | 50.2° 18:05 | 5.15 | 13% | 110.7° |
| 2028-07-19 Wed | 1 | — | unknown | — | 50.2° 18:00 | 5.2 | 6% | 97.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-06-20&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.