← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-28 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° |
| 2026-08-11 Tue | 100 | 100 | 100 | 22:15–04:40 (good, 6.42 h) | 71.1° 00:00 | 6.41 | 1% | 135.9° |
| 2026-08-12 Wed | 100 | 97 | 97 | 22:15–04:45 (good, 6.5 h) | 71.1° 00:00 | 6.47 | 0% | 135.3° |
| 2026-08-13 Thu | 100 | 33 | 33 | 22:15–01:00 (good, 2.75 h) | 71.1° 23:55 | 6.53 | 2% | 131.3° |
| 2026-08-14 Fri | 100 | 69 | 69 | 22:10–02:00 (good, 3.83 h) | 71.1° 23:50 | 6.58 | 6% | 124.8° |
| 2026-08-15 Sat | 100 | 99 | 99 | 22:10–04:45 (good, 6.58 h) | 71.1° 23:45 | 6.64 | 12% | 116.9° |
| 2026-08-16 Sun | 100 | 100 | 100 | 22:05–04:50 (good, 6.75 h) | 71.1° 23:40 | 6.7 | 20% | 108.2° |
| 2026-08-17 Mon | 100 | 100 | 100 | 22:05–04:45 (good, 6.67 h) | 71.1° 23:40 | 6.76 | 29% | 99.3° |
| 2026-08-18 Tue | 100 | 66 | 66 | 22:05–02:00 (good, 3.92 h) | 71.1° 23:35 | 6.81 | 39% | 90.4° |
| 2026-08-19 Wed | 100 | 100 | 100 | 22:00–04:35 (good, 6.58 h) | 71.1° 23:30 | 6.87 | 48% | 81.7° |
| 2026-08-20 Thu | 100 | 99 | 99 | 22:00–04:30 (good, 6.5 h) | 71.1° 23:25 | 6.93 | 58% | 73.3° |
| 2026-08-21 Fri | 100 | 100 | 100 | 21:55–04:30 (good, 6.58 h) | 71.1° 23:20 | 6.99 | 67% | 65.4° |
| 2026-08-22 Sat | 99 | 90 | 89 | 01:00–04:25 (good, 3.42 h) | 71.1° 23:20 | 7.04 | 76% | 58.1° |
| 2026-08-23 Sun | 91 | 87 | 79 | 01:00–04:05 (good, 3.08 h) | 71.1° 23:15 | 7.1 | 83% | 51.8° |
| 2026-08-24 Mon | 83 | 47 | 39 | 03:25–04:15 (good, 0.83 h) | 71.1° 23:10 | 7.16 | 90% | 47.0° |
| 2026-08-25 Tue | 51 | 97 | 50 | 21:50–04:40 (marginal, 6.83 h) | 71.1° 23:05 | 7.22 | 95% | 44.3° |
| 2026-08-26 Wed | 45 | 93 | 42 | 21:45–04:20 (marginal, 6.58 h) | 71.1° 23:05 | 7.27 | 98% | 44.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-28&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.