← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-12 Sun | 100 | 89 | 89 | 23:05–03:55 (good, 4.83 h) | 71.1° 02:00 | 4.87 | 3% | 121.5° |
| 2026-07-13 Mon | 100 | 89 | 89 | 23:00–03:55 (good, 4.92 h) | 71.1° 01:55 | 4.91 | 0% | 129.3° |
| 2026-07-14 Tue | 100 | 98 | 98 | 23:00–04:00 (good, 5.0 h) | 71.1° 01:50 | 4.96 | 0% | 134.5° |
| 2026-07-15 Wed | 100 | 57 | 57 | 02:00–04:00 (good, 2.0 h) | 71.1° 01:50 | 5.0 | 3% | 136.1° |
| 2026-07-16 Thu | 100 | 22 | 22 | 23:00–00:00 (good, 1.0 h) | 71.1° 01:45 | 5.04 | 9% | 133.9° |
| 2026-07-17 Fri | 100 | 98 | 98 | 22:55–04:00 (good, 5.08 h) | 71.1° 01:40 | 5.08 | 16% | 128.8° |
| 2026-07-18 Sat | 100 | 94 | 94 | 22:55–04:05 (good, 5.17 h) | 71.1° 01:35 | 5.13 | 25% | 121.7° |
| 2026-07-19 Sun | 100 | 98 | 98 | 22:55–04:05 (good, 5.17 h) | 71.1° 01:30 | 5.18 | 35% | 113.6° |
| 2026-07-20 Mon | 100 | 54 | 54 | 02:00–04:05 (good, 2.08 h) | 71.1° 01:30 | 5.22 | 45% | 105.0° |
| 2026-07-21 Tue | 100 | 73 | 73 | 23:00–03:00 (good, 4.0 h) | 71.1° 01:25 | 5.27 | 55% | 96.3° |
| 2026-07-22 Wed | 100 | 96 | 96 | 22:50–04:10 (good, 5.33 h) | 71.1° 01:20 | 5.32 | 64% | 87.6° |
| 2026-07-23 Thu | 100 | 62 | 62 | 23:00–02:00 (good, 3.0 h) | 71.1° 01:15 | 5.37 | 73% | 79.0° |
| 2026-07-24 Fri | 100 | 0 | 0 | — | 71.1° 01:10 | 5.42 | 81% | 70.8° |
| 2026-07-25 Sat | 100 | 87 | 87 | 01:00–04:15 (good, 3.25 h) | 71.1° 01:10 | 5.47 | 88% | 63.0° |
| 2026-07-26 Sun | 96 | 86 | 83 | 00:00–04:15 (good, 4.25 h) | 71.1° 01:05 | 5.52 | 93% | 56.0° |
| 2026-07-27 Mon | 59 | 99 | 58 | 02:30–03:00 (good, 0.5 h) | 71.1° 01:00 | 5.58 | 97% | 50.1° |
| 2026-07-28 Tue | 48 | 90 | 43 | 22:40–04:20 (marginal, 5.67 h) | 71.1° 00:55 | 5.63 | 100% | 45.9° |
| 2026-07-29 Wed | 45 | 100 | 45 | 22:40–04:20 (marginal, 5.67 h) | 71.1° 00:55 | 5.68 | 100% | 43.9° |
| 2026-07-30 Thu | 47 | 100 | 47 | 22:40–04:20 (marginal, 5.67 h) | 71.1° 00:50 | 5.74 | 98% | 44.7° |
| 2026-07-31 Fri | 54 | 100 | 54 | 22:35–23:15 (good, 0.67 h) | 71.1° 00:45 | 5.79 | 95% | 48.0° |
| 2026-08-01 Sat | 66 | 100 | 66 | 22:35–00:30 (good, 1.92 h) | 71.1° 00:40 | 5.85 | 89% | 53.7° |
| 2026-08-02 Sun | 75 | 99 | 74 | 22:35–02:35 (good, 4.0 h) | 71.1° 00:35 | 5.9 | 82% | 61.0° |
| 2026-08-03 Mon | 100 | 99 | 99 | 22:30–03:50 (good, 5.33 h) | 71.1° 00:35 | 5.96 | 73% | 69.5° |
| 2026-08-04 Tue | 100 | 95 | 95 | 22:30–04:30 (good, 6.0 h) | 71.1° 00:30 | 6.01 | 63% | 78.8° |
| 2026-08-05 Wed | 100 | 90 | 90 | 22:30–04:30 (good, 6.0 h) | 71.1° 00:25 | 6.07 | 52% | 88.6° |
| 2026-08-06 Thu | 100 | 90 | 90 | 22:25–04:35 (good, 6.17 h) | 71.1° 00:20 | 6.13 | 40% | 98.7° |
| 2026-08-07 Fri | 100 | 97 | 97 | 22:25–04:35 (good, 6.17 h) | 71.1° 00:15 | 6.18 | 30% | 108.6° |
| 2026-08-08 Sat | 100 | 77 | 77 | 22:20–03:00 (good, 4.67 h) | 71.1° 00:15 | 6.24 | 19% | 118.1° |
| 2026-08-09 Sun | 100 | 94 | 94 | 22:20–04:40 (good, 6.33 h) | 71.1° 00:10 | 6.3 | 11% | 126.4° |
| 2026-08-10 Mon | 100 | 99 | 99 | 22:20–04:40 (good, 6.33 h) | 71.1° 00:05 | 6.35 | 5% | 132.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-12&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.