← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-08-21 Fri | 77 | 100 | 77 | 02:00–04:55 (good, 2.92 h) | 72.5° 07:05 | 6.99 | 67% | 161.0° |
| 2026-08-22 Sat | 80 | 98 | 78 | 02:00–05:00 (good, 3.0 h) | 72.5° 07:05 | 7.04 | 76% | 149.2° |
| 2026-08-23 Sun | 81 | 85 | 69 | 02:05–05:00 (good, 2.92 h) | 72.5° 07:00 | 7.1 | 83% | 137.3° |
| 2026-08-24 Mon | 82 | 92 | 75 | 02:00–05:00 (good, 3.0 h) | 72.5° 06:55 | 7.16 | 90% | 125.3° |
| 2026-08-25 Tue | 79 | 98 | 77 | 02:00–05:00 (good, 3.0 h) | 72.5° 06:50 | 7.22 | 95% | 113.1° |
| 2026-08-26 Wed | 61 | 98 | 60 | 02:05–05:05 (good, 3.0 h) | 72.5° 06:45 | 7.27 | 98% | 100.7° |
| 2026-08-27 Thu | 49 | 97 | 48 | 03:00–05:05 (good, 2.08 h) | 72.5° 06:45 | 7.33 | 100% | 88.0° |
| 2026-08-28 Fri | 38 | 88 | 33 | 01:20–05:05 (marginal, 3.75 h) | 72.5° 06:40 | 7.39 | 99% | 75.1° |
| 2026-08-29 Sat | 28 | 0 | 0 | — | 72.5° 06:35 | 7.44 | 97% | 62.0° |
| 2026-08-30 Sun | 21 | 100 | 21 | 01:30–05:10 (marginal, 3.67 h) | 72.5° 06:30 | 7.5 | 92% | 48.7° |
| 2026-08-31 Mon | 16 | 100 | 16 | 01:35–05:10 (marginal, 3.58 h) | 72.5° 06:30 | 7.56 | 85% | 35.2° |
| 2026-09-01 Tue | 19 | 85 | 16 | 01:15–04:00 (marginal, 2.75 h) | 72.5° 06:25 | 7.61 | 76% | 21.5° |
| 2026-09-02 Wed | 28 | 1 | 0 | — | 72.5° 06:20 | 7.67 | 66% | 7.7° |
| 2026-09-03 Thu | 41 | 87 | 36 | 00:45–05:15 (marginal, 4.5 h) | 72.5° 06:15 | 7.72 | 55% | 6.5° |
| 2026-09-04 Fri | 56 | 100 | 56 | 01:30–05:15 (good, 3.75 h) | 72.5° 06:10 | 7.78 | 43% | 20.6° |
| 2026-09-05 Sat | 75 | 100 | 75 | 01:15–05:15 (good, 4.0 h) | 72.5° 06:10 | 7.83 | 32% | 34.8° |
| 2026-09-06 Sun | 90 | 100 | 90 | 01:00–05:20 (good, 4.33 h) | 72.5° 06:05 | 7.89 | 22% | 49.1° |
| 2026-09-07 Mon | 96 | 100 | 96 | 00:55–05:20 (good, 4.42 h) | 72.5° 06:00 | 7.94 | 13% | 63.4° |
| 2026-09-08 Tue | 100 | 100 | 100 | 00:50–05:20 (good, 4.5 h) | 72.5° 05:55 | 8.0 | 6% | 77.7° |
| 2026-09-09 Wed | 100 | 80 | 80 | 00:50–05:00 (good, 4.17 h) | 72.5° 05:50 | 8.05 | 2% | 91.8° |
| 2026-09-10 Thu | 100 | 100 | 100 | 00:45–05:25 (good, 4.67 h) | 72.5° 05:50 | 8.11 | 0% | 105.8° |
| 2026-09-11 Fri | 100 | 100 | 100 | 00:40–05:25 (good, 4.75 h) | 72.5° 05:45 | 8.16 | 1% | 119.5° |
| 2026-09-12 Sat | 100 | 0 | 0 | — | 72.5° 05:40 | 8.21 | 4% | 132.8° |
| 2026-09-13 Sun | 100 | 91 | 91 | 00:55–05:30 (good, 4.58 h) | 72.5° 05:35 | 8.27 | 9% | 145.8° |
| 2026-09-14 Mon | 100 | 37 | 37 | 00:35–02:00 (good, 1.42 h) | 72.5° 05:35 | 8.32 | 15% | 158.5° |
| 2026-09-15 Tue | 100 | 85 | 85 | 01:35–05:30 (good, 3.92 h) | 72.5° 05:30 | 8.37 | 23% | 170.8° |
| 2026-09-16 Wed | 100 | 99 | 99 | 00:20–05:30 (good, 5.17 h) | 72.5° 05:25 | 8.42 | 32% | 176.8° |
| 2026-09-17 Thu | 100 | 100 | 100 | 00:15–05:30 (good, 5.25 h) | 72.5° 05:20 | 8.48 | 41% | 165.0° |
| 2026-09-18 Fri | 100 | 91 | 91 | 00:15–05:35 (good, 5.33 h) | 72.5° 05:15 | 8.53 | 51% | 153.1° |
| 2026-09-19 Sat | 100 | 76 | 76 | 00:10–02:00 (good, 1.83 h) | 72.5° 05:15 | 8.58 | 60% | 141.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-08-21&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.