← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-07-16 Sun | 41 | — | unknown | 02:00–04:00 (good, 2.0 h) | 79.1° 07:15 | 5.06 | 30% | 20.9° |
| 2028-07-17 Mon | 51 | — | unknown | 01:45–04:05 (good, 2.33 h) | 79.1° 07:10 | 5.11 | 21% | 31.4° |
| 2028-07-18 Tue | 60 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:05 | 5.15 | 13% | 43.6° |
| 2028-07-19 Wed | 66 | — | unknown | 01:35–04:05 (good, 2.5 h) | 79.1° 07:05 | 5.2 | 6% | 56.6° |
| 2028-07-20 Thu | 70 | — | unknown | 01:30–04:10 (good, 2.67 h) | 79.1° 07:00 | 5.25 | 2% | 70.2° |
| 2028-07-21 Fri | 72 | — | unknown | 01:30–04:10 (good, 2.67 h) | 79.1° 06:55 | 5.3 | 0% | 84.3° |
| 2028-07-22 Sat | 74 | — | unknown | 01:25–04:10 (good, 2.75 h) | 79.1° 06:50 | 5.35 | 1% | 98.6° |
| 2028-07-23 Sun | 78 | — | unknown | 01:20–04:10 (good, 2.83 h) | 79.1° 06:45 | 5.4 | 5% | 113.0° |
| 2028-07-24 Mon | 81 | — | unknown | 01:15–04:15 (good, 3.0 h) | 79.1° 06:45 | 5.45 | 11% | 127.2° |
| 2028-07-25 Tue | 83 | — | unknown | 01:10–04:15 (good, 3.08 h) | 79.1° 06:40 | 5.5 | 20% | 141.0° |
| 2028-07-26 Wed | 85 | — | unknown | 01:10–04:15 (good, 3.08 h) | 79.1° 06:35 | 5.55 | 30% | 153.9° |
| 2028-07-27 Thu | 89 | — | unknown | 01:05–04:20 (good, 3.25 h) | 79.1° 06:30 | 5.6 | 41% | 163.8° |
| 2028-07-28 Fri | 91 | — | unknown | 01:00–04:20 (good, 3.33 h) | 79.1° 06:25 | 5.66 | 52% | 164.7° |
| 2028-07-29 Sat | 93 | — | unknown | 00:55–04:20 (good, 3.42 h) | 79.1° 06:25 | 5.71 | 63% | 156.1° |
| 2028-07-30 Sun | 94 | — | unknown | 01:00–04:25 (good, 3.42 h) | 79.1° 06:20 | 5.77 | 73% | 144.7° |
| 2028-07-31 Mon | 95 | — | unknown | 00:55–04:25 (good, 3.5 h) | 79.1° 06:15 | 5.82 | 82% | 132.6° |
| 2028-08-01 Tue | 95 | — | unknown | 00:55–04:25 (good, 3.5 h) | 79.1° 06:10 | 5.88 | 89% | 120.5° |
| 2028-08-02 Wed | 91 | — | unknown | 00:55–04:30 (good, 3.58 h) | 79.1° 06:10 | 5.93 | 94% | 108.4° |
| 2028-08-03 Thu | 68 | — | unknown | 01:00–04:30 (good, 3.5 h) | 79.1° 06:05 | 5.99 | 98% | 96.4° |
| 2028-08-04 Fri | 55 | — | unknown | 01:55–04:30 (good, 2.58 h) | 79.1° 06:00 | 6.04 | 100% | 84.5° |
| 2028-08-05 Sat | 44 | — | unknown | 03:15–04:35 (good, 1.33 h) | 79.1° 05:55 | 6.1 | 100% | 72.8° |
| 2028-08-06 Sun | 34 | — | unknown | 00:15–04:35 (marginal, 4.33 h) | 79.1° 05:50 | 6.16 | 98% | 61.3° |
| 2028-08-07 Mon | 27 | — | unknown | 00:15–04:35 (marginal, 4.33 h) | 79.1° 05:50 | 6.21 | 94% | 50.0° |
| 2028-08-08 Tue | 22 | — | unknown | 00:15–04:35 (marginal, 4.33 h) | 79.1° 05:45 | 6.27 | 88% | 38.9° |
| 2028-08-09 Wed | 22 | — | unknown | 00:05–04:40 (marginal, 4.58 h) | 79.1° 05:40 | 6.33 | 82% | 28.4° |
| 2028-08-10 Thu | 29 | — | unknown | 23:50–04:40 (marginal, 4.83 h) | 79.1° 05:35 | 6.38 | 74% | 19.1° |
| 2028-08-11 Fri | 38 | — | unknown | 23:40–04:40 (marginal, 5.0 h) | 79.1° 05:30 | 6.44 | 65% | 14.3° |
| 2028-08-12 Sat | 52 | — | unknown | 01:10–04:20 (good, 3.17 h) | 79.1° 05:30 | 6.5 | 56% | 18.1° |
| 2028-08-13 Sun | 68 | — | unknown | 00:15–04:45 (good, 4.5 h) | 79.1° 05:25 | 6.56 | 46% | 27.5° |
| 2028-08-14 Mon | 82 | — | unknown | 23:55–04:45 (good, 4.83 h) | 79.1° 05:20 | 6.61 | 35% | 38.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-07-16&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.