← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-19 Sun | 36 | — | unknown | 03:30–04:55 (good, 1.42 h) | 71.1° 08:30 | 8.75 | 2% | 69.4° |
| 2045-03-20 Mon | 36 | — | unknown | 03:25–04:50 (good, 1.42 h) | 71.1° 08:25 | 8.7 | 5% | 78.2° |
| 2045-03-21 Tue | 38 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:25 | 8.65 | 11% | 87.5° |
| 2045-03-22 Wed | 39 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:20 | 8.6 | 18% | 97.1° |
| 2045-03-23 Thu | 39 | — | unknown | 03:15–04:45 (good, 1.5 h) | 71.1° 08:15 | 8.54 | 27% | 106.5° |
| 2045-03-24 Fri | 40 | — | unknown | 03:10–04:45 (good, 1.58 h) | 71.1° 08:10 | 8.49 | 38% | 115.7° |
| 2045-03-25 Sat | 40 | — | unknown | 04:05–05:40 (good, 1.58 h) | 71.1° 09:05 | 8.44 | 49% | 123.9° |
| 2045-03-26 Sun | 41 | — | unknown | 04:05–05:40 (good, 1.58 h) | 71.1° 09:05 | 8.39 | 60% | 130.7° |
| 2045-03-27 Mon | 42 | — | unknown | 04:05–05:40 (good, 1.58 h) | 71.1° 09:00 | 8.33 | 71% | 135.0° |
| 2045-03-28 Tue | 41 | — | unknown | 04:00–05:35 (good, 1.58 h) | 71.1° 08:55 | 8.28 | 81% | 135.9° |
| 2045-03-29 Wed | 38 | — | unknown | 04:00–05:35 (good, 1.58 h) | 71.1° 08:50 | 8.22 | 89% | 133.1° |
| 2045-03-30 Thu | 37 | — | unknown | 03:55–05:35 (good, 1.67 h) | 71.1° 08:50 | 8.17 | 95% | 127.2° |
| 2045-03-31 Fri | 37 | — | unknown | 03:55–05:30 (good, 1.58 h) | 71.1° 08:45 | 8.12 | 99% | 119.3° |
| 2045-04-01 Sat | 34 | — | unknown | 03:55–05:30 (good, 1.58 h) | 71.1° 08:40 | 8.06 | 100% | 110.1° |
| 2045-04-02 Sun | 30 | — | unknown | 03:55–05:25 (good, 1.5 h) | 71.1° 08:35 | 8.01 | 98% | 100.5° |
| 2045-04-03 Mon | 28 | — | unknown | 03:55–05:25 (good, 1.5 h) | 71.1° 08:30 | 7.95 | 94% | 90.7° |
| 2045-04-04 Tue | 27 | — | unknown | 04:10–05:25 (good, 1.25 h) | 71.1° 08:30 | 7.89 | 88% | 81.2° |
| 2045-04-05 Wed | 27 | — | unknown | 04:05–05:20 (good, 1.25 h) | 71.1° 08:25 | 7.84 | 81% | 72.2° |
| 2045-04-06 Thu | 28 | — | unknown | 03:45–05:20 (good, 1.58 h) | 71.1° 08:20 | 7.78 | 72% | 64.0° |
| 2045-04-07 Fri | 29 | — | unknown | 03:40–05:15 (good, 1.58 h) | 71.1° 08:15 | 7.73 | 63% | 56.6° |
| 2045-04-08 Sat | 33 | — | unknown | 03:30–05:15 (good, 1.75 h) | 71.1° 08:10 | 7.67 | 54% | 50.6° |
| 2045-04-09 Sun | 42 | — | unknown | 03:05–05:15 (good, 2.17 h) | 71.1° 08:10 | 7.61 | 44% | 46.3° |
| 2045-04-10 Mon | 47 | — | unknown | 03:05–05:10 (good, 2.08 h) | 71.1° 08:05 | 7.56 | 35% | 44.1° |
| 2045-04-11 Tue | 52 | — | unknown | 03:00–05:10 (good, 2.17 h) | 71.1° 08:00 | 7.5 | 26% | 44.4° |
| 2045-04-12 Wed | 55 | — | unknown | 02:55–05:05 (good, 2.17 h) | 71.1° 07:55 | 7.44 | 18% | 47.2° |
| 2045-04-13 Thu | 57 | — | unknown | 02:50–05:05 (good, 2.25 h) | 71.1° 07:55 | 7.39 | 12% | 52.1° |
| 2045-04-14 Fri | 59 | — | unknown | 02:45–05:05 (good, 2.33 h) | 71.1° 07:50 | 7.33 | 6% | 58.7° |
| 2045-04-15 Sat | 59 | — | unknown | 02:45–05:00 (good, 2.25 h) | 71.1° 07:45 | 7.27 | 2% | 66.6° |
| 2045-04-16 Sun | 60 | — | unknown | 02:40–05:00 (good, 2.33 h) | 71.1° 07:40 | 7.21 | 0% | 75.4° |
| 2045-04-17 Mon | 60 | — | unknown | 02:35–04:55 (good, 2.33 h) | 71.1° 07:35 | 7.15 | 1% | 84.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-19&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.