← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-04-16 Sun | 52 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.2° 08:35 | 7.21 | 48% | 65.3° |
| 2028-04-17 Mon | 56 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:35 | 7.15 | 38% | 60.4° |
| 2028-04-18 Tue | 62 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.3° 08:30 | 7.09 | 29% | 56.7° |
| 2028-04-19 Wed | 66 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.3° 08:25 | 7.03 | 21% | 54.5° |
| 2028-04-20 Thu | 69 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.97 | 14% | 54.0° |
| 2028-04-21 Fri | 71 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.92 | 8% | 55.4° |
| 2028-04-22 Sat | 71 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.2° 08:15 | 6.86 | 4% | 58.4° |
| 2028-04-23 Sun | 73 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.3° 08:10 | 6.8 | 1% | 62.9° |
| 2028-04-24 Mon | 74 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.2° 08:05 | 6.74 | 0% | 68.7° |
| 2028-04-25 Tue | 75 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.68 | 1% | 75.3° |
| 2028-04-26 Wed | 76 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.62 | 5% | 82.7° |
| 2028-04-27 Thu | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.57 | 10% | 90.4° |
| 2028-04-28 Fri | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:50 | 6.51 | 18% | 98.2° |
| 2028-04-29 Sat | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.45 | 27% | 105.8° |
| 2028-04-30 Sun | 79 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:40 | 6.39 | 37% | 112.9° |
| 2028-05-01 Mon | 80 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:40 | 6.33 | 48% | 119.0° |
| 2028-05-02 Tue | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:35 | 6.28 | 59% | 123.5° |
| 2028-05-03 Wed | 80 | — | unknown | 01:25–04:25 (good, 3.0 h) | 87.3° 07:30 | 6.22 | 70% | 125.9° |
| 2028-05-04 Thu | 80 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.2° 07:25 | 6.16 | 80% | 125.7° |
| 2028-05-05 Fri | 80 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.2° 07:25 | 6.1 | 89% | 123.0° |
| 2028-05-06 Sat | 71 | — | unknown | 01:20–04:20 (good, 3.0 h) | 87.2° 07:20 | 6.05 | 95% | 118.1° |
| 2028-05-07 Sun | 66 | — | unknown | 01:20–04:20 (good, 3.0 h) | 87.3° 07:15 | 5.99 | 99% | 111.6° |
| 2028-05-08 Mon | 61 | — | unknown | 01:20–04:20 (good, 3.0 h) | 87.2° 07:10 | 5.93 | 100% | 104.1° |
| 2028-05-09 Tue | 56 | — | unknown | 01:20–04:15 (good, 2.92 h) | 87.2° 07:05 | 5.88 | 98% | 96.2° |
| 2028-05-10 Wed | 53 | — | unknown | 01:20–04:15 (good, 2.92 h) | 87.2° 07:05 | 5.82 | 95% | 88.3° |
| 2028-05-11 Thu | 51 | — | unknown | 01:15–04:15 (good, 3.0 h) | 87.2° 07:00 | 5.77 | 89% | 80.6° |
| 2028-05-12 Fri | 52 | — | unknown | 01:10–04:10 (good, 3.0 h) | 87.3° 06:55 | 5.71 | 82% | 73.4° |
| 2028-05-13 Sat | 61 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.2° 06:50 | 5.66 | 73% | 67.0° |
| 2028-05-14 Sun | 68 | — | unknown | 00:30–04:10 (good, 3.67 h) | 87.2° 06:45 | 5.6 | 64% | 61.6° |
| 2028-05-15 Mon | 74 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.2° 06:45 | 5.55 | 55% | 57.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-04-16&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.