← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-06-18 Wed | 25 | 91 | 23 | 23:10–23:55 (good, 0.75 h) | 50.2° 20:05 | 4.43 | 49% | 171.7° |
| 2025-06-19 Thu | 24 | 90 | 22 | 23:10–23:40 (good, 0.5 h) | 50.2° 20:00 | 4.42 | 37% | 169.9° |
| 2025-06-20 Fri | 22 | 83 | 18 | 23:15–23:30 (good, 0.25 h) | 50.2° 19:55 | 4.42 | 26% | 156.7° |
| 2025-06-21 Sat | 20 | 59 | 12 | 23:15–23:55 (marginal, 0.67 h) | 50.2° 19:50 | 4.42 | 17% | 142.5° |
| 2025-06-22 Sun | 18 | 100 | 18 | 23:15–23:40 (good, 0.42 h) | 50.2° 19:45 | 4.42 | 9% | 127.9° |
| 2025-06-23 Mon | 17 | 100 | 17 | 23:15–23:35 (good, 0.33 h) | 50.2° 19:45 | 4.43 | 3% | 113.3° |
| 2025-06-24 Tue | 15 | 100 | 15 | 23:15–23:30 (good, 0.25 h) | 50.2° 19:40 | 4.44 | 1% | 98.7° |
| 2025-06-25 Wed | 14 | 99 | 14 | 23:15–23:25 (good, 0.17 h) | 50.2° 19:35 | 4.45 | 0% | 84.2° |
| 2025-06-26 Thu | 12 | 99 | 12 | 23:15–23:25 (good, 0.17 h) | 50.2° 19:30 | 4.46 | 3% | 70.1° |
| 2025-06-27 Fri | 11 | 70 | 8 | 23:00–23:50 (marginal, 0.83 h) | 50.2° 19:25 | 4.47 | 8% | 56.4° |
| 2025-06-28 Sat | 9 | 30 | 3 | — | 50.2° 19:25 | 4.48 | 15% | 43.1° |
| 2025-06-29 Sun | 8 | 100 | 8 | 22:20–23:00 (marginal, 0.67 h) | 50.2° 19:20 | 4.5 | 23% | 30.3° |
| 2025-06-30 Mon | 6 | 94 | 6 | 23:10–23:35 (marginal, 0.42 h) | 50.2° 19:15 | 4.52 | 32% | 18.1° |
| 2025-07-01 Tue | 5 | 69 | 3 | — | 50.2° 19:10 | 4.54 | 42% | 7.7° |
| 2025-07-02 Wed | 4 | 100 | 4 | 23:10–23:25 (marginal, 0.25 h) | 50.2° 19:10 | 4.56 | 51% | 9.4° |
| 2025-07-03 Thu | 3 | 100 | 3 | 23:10–23:20 (marginal, 0.17 h) | 50.2° 19:05 | 4.59 | 61% | 20.1° |
| 2025-07-04 Fri | 2 | 100 | 2 | — | 50.2° 19:00 | 4.62 | 70% | 31.6° |
| 2025-07-05 Sat | 2 | 96 | 2 | — | 50.2° 18:55 | 4.64 | 78% | 43.2° |
| 2025-07-06 Sun | 1 | 96 | 1 | — | 50.2° 18:50 | 4.67 | 85% | 55.0° |
| 2025-07-07 Mon | 1 | 99 | 1 | — | 50.2° 18:50 | 4.7 | 91% | 67.0° |
| 2025-07-08 Tue | 2 | 100 | 2 | — | 50.2° 18:45 | 4.74 | 96% | 79.2° |
| 2025-07-09 Wed | 2 | 90 | 2 | — | 50.2° 18:40 | 4.77 | 99% | 91.6° |
| 2025-07-10 Thu | 2 | 47 | 1 | — | 50.2° 18:35 | 4.81 | 100% | 104.2° |
| 2025-07-11 Fri | 2 | 17 | 0 | — | 50.2° 18:30 | 4.85 | 99% | 117.1° |
| 2025-07-12 Sat | 2 | 85 | 2 | — | 50.2° 18:30 | 4.88 | 95% | 130.1° |
| 2025-07-13 Sun | 2 | 100 | 2 | — | 50.2° 18:25 | 4.92 | 90% | 143.3° |
| 2025-07-14 Mon | 2 | 98 | 2 | — | 50.2° 18:20 | 4.97 | 82% | 156.6° |
| 2025-07-15 Tue | 1 | 71 | 1 | — | 50.2° 18:15 | 5.01 | 73% | 169.2° |
| 2025-07-16 Wed | 1 | 75 | 1 | — | 50.2° 18:15 | 5.05 | 62% | 172.0° |
| 2025-07-17 Thu | 1 | 32 | 0 | — | 50.2° 18:10 | 5.1 | 51% | 160.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-06-18&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.