← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-11 Sat | 46 | 100 | 46 | 02:10–03:55 (good, 1.75 h) | 79.1° 07:35 | 4.84 | 9% | 42.9° |
| 2026-07-12 Sun | 50 | 95 | 48 | 02:10–03:55 (good, 1.75 h) | 79.1° 07:30 | 4.87 | 3% | 57.0° |
| 2026-07-13 Mon | 52 | 89 | 47 | 02:10–03:55 (good, 1.75 h) | 79.1° 07:30 | 4.91 | 0% | 71.5° |
| 2026-07-14 Tue | 54 | 99 | 53 | 01:55–04:00 (good, 2.08 h) | 79.1° 07:25 | 4.96 | 0% | 86.0° |
| 2026-07-15 Wed | 57 | 82 | 47 | 02:05–04:00 (good, 1.92 h) | 79.1° 07:20 | 5.0 | 3% | 100.3° |
| 2026-07-16 Thu | 59 | 18 | 11 | 04:00–04:50 (marginal, 0.83 h) | 79.1° 07:15 | 5.04 | 9% | 114.2° |
| 2026-07-17 Fri | 61 | 98 | 60 | 01:50–04:00 (good, 2.17 h) | 79.1° 07:10 | 5.08 | 16% | 127.5° |
| 2026-07-18 Sat | 64 | 90 | 58 | 01:40–04:05 (good, 2.42 h) | 79.1° 07:10 | 5.13 | 25% | 140.2° |
| 2026-07-19 Sun | 66 | 99 | 65 | 01:40–04:05 (good, 2.42 h) | 79.1° 07:05 | 5.18 | 35% | 151.8° |
| 2026-07-20 Mon | 68 | 70 | 48 | 02:00–04:05 (good, 2.08 h) | 79.1° 07:00 | 5.22 | 45% | 161.3° |
| 2026-07-21 Tue | 72 | 64 | 46 | 01:30–03:00 (good, 1.5 h) | 79.1° 06:55 | 5.27 | 55% | 165.3° |
| 2026-07-22 Wed | 74 | 99 | 73 | 01:30–04:10 (good, 2.67 h) | 79.1° 06:55 | 5.32 | 64% | 160.6° |
| 2026-07-23 Thu | 75 | 55 | 41 | 03:00–04:00 (good, 1.0 h) | 79.1° 06:50 | 5.37 | 73% | 151.5° |
| 2026-07-24 Fri | 79 | 0 | 0 | — | 79.1° 06:45 | 5.42 | 81% | 141.0° |
| 2026-07-25 Sat | 79 | 89 | 71 | 01:35–04:15 (good, 2.67 h) | 79.1° 06:40 | 5.47 | 88% | 130.0° |
| 2026-07-26 Sun | 79 | 89 | 70 | 01:20–04:15 (good, 2.92 h) | 79.1° 06:35 | 5.52 | 93% | 118.7° |
| 2026-07-27 Mon | 66 | 99 | 65 | 01:25–04:20 (good, 2.92 h) | 79.1° 06:35 | 5.58 | 97% | 107.2° |
| 2026-07-28 Tue | 57 | 88 | 50 | 02:05–04:20 (good, 2.25 h) | 79.1° 06:30 | 5.63 | 100% | 95.6° |
| 2026-07-29 Wed | 47 | 100 | 47 | 02:20–04:20 (good, 2.0 h) | 79.1° 06:25 | 5.68 | 100% | 83.8° |
| 2026-07-30 Thu | 37 | 100 | 37 | 03:35–04:20 (good, 0.75 h) | 79.1° 06:20 | 5.74 | 98% | 71.8° |
| 2026-07-31 Fri | 30 | 100 | 30 | 00:35–04:25 (marginal, 3.83 h) | 79.1° 06:15 | 5.79 | 95% | 59.7° |
| 2026-08-01 Sat | 24 | 100 | 24 | 00:35–04:25 (marginal, 3.83 h) | 79.1° 06:15 | 5.85 | 89% | 47.6° |
| 2026-08-02 Sun | 22 | 100 | 22 | 00:35–04:25 (marginal, 3.83 h) | 79.1° 06:10 | 5.9 | 82% | 35.6° |
| 2026-08-03 Mon | 26 | 100 | 26 | 00:20–04:30 (marginal, 4.17 h) | 79.1° 06:05 | 5.96 | 73% | 24.3° |
| 2026-08-04 Tue | 35 | 98 | 34 | 00:15–04:30 (marginal, 4.25 h) | 79.1° 06:00 | 6.01 | 63% | 15.9° |
| 2026-08-05 Wed | 48 | 95 | 46 | 02:45–04:30 (good, 1.75 h) | 79.1° 06:00 | 6.07 | 52% | 16.4° |
| 2026-08-06 Thu | 64 | 91 | 58 | 02:00–04:35 (good, 2.58 h) | 79.1° 05:55 | 6.13 | 40% | 25.8° |
| 2026-08-07 Fri | 83 | 99 | 82 | 00:25–04:35 (good, 4.17 h) | 79.1° 05:50 | 6.18 | 30% | 38.3° |
| 2026-08-08 Sat | 92 | 71 | 65 | 02:00–03:00 (good, 1.0 h) | 79.1° 05:45 | 6.24 | 19% | 51.8° |
| 2026-08-09 Sun | 98 | 96 | 94 | 00:20–04:40 (good, 4.33 h) | 79.1° 05:40 | 6.3 | 11% | 65.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-11&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.