← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-06-13 Sat | 33 | 91 | 30 | 23:10–00:15 (good, 1.08 h) | 50.2° 20:25 | 4.48 | 2% | 119.3° |
| 2026-06-14 Sun | 31 | 98 | 30 | 23:10–00:05 (good, 0.92 h) | 50.2° 20:20 | 4.46 | 0% | 104.2° |
| 2026-06-15 Mon | 29 | 76 | 22 | 23:10–23:40 (good, 0.5 h) | 50.2° 20:15 | 4.45 | 1% | 89.1° |
| 2026-06-16 Tue | 28 | 0 | 0 | — | 50.2° 20:10 | 4.44 | 5% | 74.2° |
| 2026-06-17 Wed | 26 | 0 | 0 | — | 50.2° 20:10 | 4.43 | 12% | 59.6° |
| 2026-06-18 Thu | 22 | 81 | 18 | 23:10–23:35 (good, 0.42 h) | 50.2° 20:05 | 4.43 | 20% | 45.4° |
| 2026-06-19 Fri | 18 | 83 | 15 | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:00 | 4.42 | 30% | 31.8° |
| 2026-06-20 Sat | 14 | 94 | 13 | 23:15–23:20 (good, 0.08 h) | 50.2° 19:55 | 4.42 | 40% | 19.1° |
| 2026-06-21 Sun | 11 | 98 | 11 | 23:15–00:10 (marginal, 0.92 h) | 50.2° 19:50 | 4.42 | 50% | 8.9° |
| 2026-06-22 Mon | 8 | 90 | 7 | 23:15–00:00 (marginal, 0.75 h) | 50.2° 19:50 | 4.42 | 60% | 11.1° |
| 2026-06-23 Tue | 6 | 30 | 2 | — | 50.2° 19:45 | 4.43 | 70% | 21.7° |
| 2026-06-24 Wed | 5 | 67 | 3 | 23:15–23:35 (marginal, 0.33 h) | 50.2° 19:40 | 4.43 | 78% | 33.3° |
| 2026-06-25 Thu | 5 | 81 | 4 | 23:15–23:35 (marginal, 0.33 h) | 50.2° 19:35 | 4.44 | 86% | 45.1° |
| 2026-06-26 Fri | 5 | 88 | 4 | 23:15–23:40 (marginal, 0.42 h) | 50.2° 19:30 | 4.45 | 92% | 56.8° |
| 2026-06-27 Sat | 5 | 86 | 4 | 23:15–23:35 (marginal, 0.33 h) | 50.2° 19:30 | 4.47 | 96% | 68.5° |
| 2026-06-28 Sun | 5 | 100 | 5 | 23:15–23:40 (marginal, 0.42 h) | 50.2° 19:25 | 4.48 | 99% | 80.2° |
| 2026-06-29 Mon | 6 | 89 | 5 | 23:10–23:40 (marginal, 0.5 h) | 50.2° 19:20 | 4.5 | 100% | 91.9° |
| 2026-06-30 Tue | 6 | 98 | 6 | 22:20–22:55 (marginal, 0.58 h) | 50.2° 19:15 | 4.52 | 99% | 103.7° |
| 2026-07-01 Wed | 7 | 23 | 2 | — | 50.2° 19:15 | 4.54 | 96% | 115.7° |
| 2026-07-02 Thu | 6 | 62 | 4 | 23:10–23:15 (marginal, 0.08 h) | 50.2° 19:10 | 4.56 | 92% | 127.7° |
| 2026-07-03 Fri | 6 | 7 | 0 | — | 50.2° 19:05 | 4.58 | 86% | 139.8° |
| 2026-07-04 Sat | 5 | 57 | 3 | — | 50.2° 19:00 | 4.61 | 78% | 151.9° |
| 2026-07-05 Sun | 4 | 88 | 4 | 22:20–22:35 (marginal, 0.25 h) | 50.2° 18:55 | 4.64 | 70% | 163.7° |
| 2026-07-06 Mon | 4 | 94 | 4 | 22:20–22:40 (marginal, 0.33 h) | 50.2° 18:55 | 4.67 | 59% | 172.2° |
| 2026-07-07 Tue | 3 | 84 | 3 | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:50 | 4.7 | 49% | 165.7° |
| 2026-07-08 Wed | 3 | 0 | 0 | — | 50.2° 18:45 | 4.73 | 38% | 153.1° |
| 2026-07-09 Thu | 3 | 79 | 2 | — | 50.2° 18:40 | 4.76 | 27% | 139.4° |
| 2026-07-10 Fri | 2 | 64 | 1 | — | 50.2° 18:35 | 4.8 | 17% | 125.2° |
| 2026-07-11 Sat | 2 | 100 | 2 | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:35 | 4.84 | 9% | 110.5° |
| 2026-07-12 Sun | 2 | 78 | 2 | — | 50.2° 18:30 | 4.87 | 3% | 95.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-06-13&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.