← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-05-16 Tue | 75 | — | unknown | 00:40–04:05 (good, 3.42 h) | 71.1° 05:40 | 5.5 | 46% | 44.2° |
| 2028-05-17 Wed | 82 | — | unknown | 00:35–04:05 (good, 3.5 h) | 71.1° 05:40 | 5.45 | 36% | 49.4° |
| 2028-05-18 Thu | 87 | — | unknown | 00:35–04:00 (good, 3.42 h) | 71.1° 05:35 | 5.39 | 27% | 56.1° |
| 2028-05-19 Fri | 93 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:30 | 5.34 | 19% | 64.0° |
| 2028-05-20 Sat | 96 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.29 | 12% | 72.6° |
| 2028-05-21 Sun | 97 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:20 | 5.24 | 6% | 81.9° |
| 2028-05-22 Mon | 99 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:20 | 5.2 | 2% | 91.5° |
| 2028-05-23 Tue | 100 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:15 | 5.15 | 0% | 101.3° |
| 2028-05-24 Wed | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.1 | 0% | 111.1° |
| 2028-05-25 Thu | 100 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.06 | 3% | 120.4° |
| 2028-05-26 Fri | 100 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:00 | 5.01 | 8% | 128.8° |
| 2028-05-27 Sat | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 05:00 | 4.97 | 15% | 135.3° |
| 2028-05-28 Sun | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 04:55 | 4.93 | 24% | 138.9° |
| 2028-05-29 Mon | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:50 | 4.89 | 34% | 138.7° |
| 2028-05-30 Tue | 100 | — | unknown | 23:50–03:45 (good, 3.92 h) | 71.1° 04:45 | 4.85 | 46% | 134.7° |
| 2028-05-31 Wed | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.81 | 57% | 127.8° |
| 2028-06-01 Thu | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:40 | 4.78 | 68% | 119.0° |
| 2028-06-02 Fri | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:35 | 4.74 | 78% | 109.2° |
| 2028-06-03 Sat | 100 | — | unknown | 23:50–03:45 (good, 3.92 h) | 71.1° 04:30 | 4.71 | 87% | 98.8° |
| 2028-06-04 Sun | 74 | — | unknown | 00:00–03:40 (good, 3.67 h) | 71.1° 04:25 | 4.68 | 93% | 88.3° |
| 2028-06-05 Mon | 62 | — | unknown | 00:45–03:40 (good, 2.92 h) | 71.1° 04:25 | 4.65 | 98% | 77.9° |
| 2028-06-06 Tue | 52 | — | unknown | 01:35–03:40 (good, 2.08 h) | 71.1° 04:20 | 4.62 | 100% | 68.1° |
| 2028-06-07 Wed | 44 | — | unknown | 02:50–03:40 (good, 0.83 h) | 71.1° 04:15 | 4.59 | 99% | 59.0° |
| 2028-06-08 Thu | 39 | — | unknown | 23:05–03:40 (marginal, 4.58 h) | 71.1° 04:10 | 4.57 | 97% | 51.2° |
| 2028-06-09 Fri | 44 | — | unknown | 23:05–23:10 (good, 0.08 h) | 71.1° 04:05 | 4.54 | 92% | 45.1° |
| 2028-06-10 Sat | 63 | — | unknown | 23:05–23:40 (good, 0.58 h) | 71.1° 04:05 | 4.52 | 86% | 41.5° |
| 2028-06-11 Sun | 72 | — | unknown | 23:10–02:40 (good, 3.5 h) | 71.1° 04:00 | 4.5 | 79% | 40.7° |
| 2028-06-12 Mon | 82 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 03:55 | 4.49 | 71% | 42.8° |
| 2028-06-13 Tue | 91 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 03:50 | 4.47 | 62% | 47.3° |
| 2028-06-14 Wed | 95 | — | unknown | 23:10–03:40 (good, 4.5 h) | 71.1° 03:50 | 4.46 | 52% | 53.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-05-16&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.