← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-04-23 Sun | 67 | — | unknown | 02:10–04:45 (good, 2.58 h) | 71.1° 07:10 | 6.8 | 1% | 75.7° |
| 2028-04-24 Mon | 68 | — | unknown | 02:05–04:45 (good, 2.67 h) | 71.1° 07:10 | 6.74 | 0% | 85.0° |
| 2028-04-25 Tue | 69 | — | unknown | 02:05–04:40 (good, 2.58 h) | 71.1° 07:05 | 6.68 | 1% | 94.6° |
| 2028-04-26 Wed | 71 | — | unknown | 02:00–04:40 (good, 2.67 h) | 71.1° 07:00 | 6.62 | 5% | 104.3° |
| 2028-04-27 Thu | 71 | — | unknown | 01:55–04:40 (good, 2.75 h) | 71.1° 06:55 | 6.57 | 10% | 113.7° |
| 2028-04-28 Fri | 72 | — | unknown | 01:50–04:35 (good, 2.75 h) | 71.1° 06:50 | 6.51 | 18% | 122.6° |
| 2028-04-29 Sat | 74 | — | unknown | 01:45–04:35 (good, 2.83 h) | 71.1° 06:50 | 6.45 | 27% | 130.4° |
| 2028-04-30 Sun | 73 | — | unknown | 01:45–04:30 (good, 2.75 h) | 71.1° 06:45 | 6.39 | 37% | 136.2° |
| 2028-05-01 Mon | 75 | — | unknown | 01:45–04:30 (good, 2.75 h) | 71.1° 06:40 | 6.33 | 48% | 139.0° |
| 2028-05-02 Tue | 75 | — | unknown | 01:40–04:30 (good, 2.83 h) | 71.1° 06:35 | 6.28 | 59% | 137.9° |
| 2028-05-03 Wed | 74 | — | unknown | 01:40–04:25 (good, 2.75 h) | 71.1° 06:35 | 6.22 | 70% | 133.2° |
| 2028-05-04 Thu | 74 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:30 | 6.16 | 80% | 125.6° |
| 2028-05-05 Fri | 74 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:25 | 6.1 | 89% | 116.3° |
| 2028-05-06 Sat | 59 | — | unknown | 01:40–04:20 (good, 2.67 h) | 71.1° 06:20 | 6.05 | 95% | 106.0° |
| 2028-05-07 Sun | 52 | — | unknown | 01:40–04:20 (good, 2.67 h) | 71.1° 06:15 | 5.99 | 99% | 95.3° |
| 2028-05-08 Mon | 46 | — | unknown | 02:15–04:20 (good, 2.08 h) | 71.1° 06:15 | 5.93 | 100% | 84.7° |
| 2028-05-09 Tue | 40 | — | unknown | 02:50–04:15 (good, 1.42 h) | 71.1° 06:10 | 5.88 | 98% | 74.3° |
| 2028-05-10 Wed | 37 | — | unknown | 03:20–04:15 (good, 0.92 h) | 71.1° 06:05 | 5.82 | 95% | 64.7° |
| 2028-05-11 Thu | 35 | — | unknown | 03:35–04:15 (good, 0.67 h) | 71.1° 06:00 | 5.77 | 89% | 56.1° |
| 2028-05-12 Fri | 36 | — | unknown | 03:20–04:10 (good, 0.83 h) | 71.1° 05:55 | 5.71 | 82% | 48.9° |
| 2028-05-13 Sat | 46 | — | unknown | 01:50–04:10 (good, 2.33 h) | 71.1° 05:55 | 5.66 | 73% | 43.7° |
| 2028-05-14 Sun | 59 | — | unknown | 00:50–04:10 (good, 3.33 h) | 71.1° 05:50 | 5.6 | 64% | 41.0° |
| 2028-05-15 Mon | 67 | — | unknown | 00:45–04:05 (good, 3.33 h) | 71.1° 05:45 | 5.55 | 55% | 41.3° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-04-23&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.