← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-03-21 Tue | 44 | — | unknown | 03:05–04:50 (good, 1.75 h) | 87.2° 09:20 | 8.65 | 11% | 70.4° |
| 2045-03-22 Wed | 45 | — | unknown | 03:00–04:50 (good, 1.83 h) | 87.2° 09:15 | 8.6 | 18% | 76.9° |
| 2045-03-23 Thu | 45 | — | unknown | 02:55–04:45 (good, 1.83 h) | 87.2° 09:15 | 8.54 | 27% | 84.1° |
| 2045-03-24 Fri | 46 | — | unknown | 02:55–04:45 (good, 1.83 h) | 87.2° 09:10 | 8.49 | 38% | 91.7° |
| 2045-03-25 Sat | 46 | — | unknown | 02:50–05:40 (good, 1.83 h) | 87.2° 10:05 | 8.44 | 49% | 99.3° |
| 2045-03-26 Sun | 47 | — | unknown | 03:55–05:40 (good, 1.75 h) | 87.2° 10:00 | 8.39 | 60% | 106.6° |
| 2045-03-27 Mon | 47 | — | unknown | 03:50–05:40 (good, 1.83 h) | 87.2° 09:55 | 8.33 | 71% | 113.2° |
| 2045-03-28 Tue | 46 | — | unknown | 03:50–05:35 (good, 1.75 h) | 87.2° 09:55 | 8.28 | 81% | 118.6° |
| 2045-03-29 Wed | 43 | — | unknown | 03:45–05:35 (good, 1.83 h) | 87.2° 09:50 | 8.22 | 89% | 122.2° |
| 2045-03-30 Thu | 42 | — | unknown | 03:45–05:35 (good, 1.83 h) | 87.2° 09:45 | 8.17 | 95% | 123.6° |
| 2045-03-31 Fri | 42 | — | unknown | 03:40–05:30 (good, 1.83 h) | 87.2° 09:40 | 8.12 | 99% | 122.6° |
| 2045-04-01 Sat | 42 | — | unknown | 03:35–05:30 (good, 1.92 h) | 87.2° 09:35 | 8.06 | 100% | 119.4° |
| 2045-04-02 Sun | 40 | — | unknown | 03:35–05:25 (good, 1.83 h) | 87.2° 09:35 | 8.01 | 98% | 114.5° |
| 2045-04-03 Mon | 39 | — | unknown | 03:35–05:25 (good, 1.83 h) | 87.2° 09:30 | 7.95 | 94% | 108.5° |
| 2045-04-04 Tue | 38 | — | unknown | 03:30–05:25 (good, 1.92 h) | 87.2° 09:25 | 7.89 | 88% | 101.8° |
| 2045-04-05 Wed | 37 | — | unknown | 03:30–05:20 (good, 1.83 h) | 87.2° 09:20 | 7.84 | 81% | 94.9° |
| 2045-04-06 Thu | 39 | — | unknown | 03:25–05:20 (good, 1.92 h) | 87.2° 09:20 | 7.78 | 72% | 88.0° |
| 2045-04-07 Fri | 39 | — | unknown | 03:15–05:15 (good, 2.0 h) | 87.2° 09:15 | 7.73 | 63% | 81.3° |
| 2045-04-08 Sat | 43 | — | unknown | 02:55–05:15 (good, 2.33 h) | 87.2° 09:10 | 7.67 | 54% | 75.0° |
| 2045-04-09 Sun | 50 | — | unknown | 02:50–05:15 (good, 2.42 h) | 87.2° 09:05 | 7.61 | 44% | 69.3° |
| 2045-04-10 Mon | 53 | — | unknown | 02:45–05:10 (good, 2.42 h) | 87.2° 09:00 | 7.56 | 35% | 64.3° |
| 2045-04-11 Tue | 57 | — | unknown | 02:45–05:10 (good, 2.42 h) | 87.2° 09:00 | 7.5 | 26% | 60.3° |
| 2045-04-12 Wed | 61 | — | unknown | 02:40–05:05 (good, 2.42 h) | 87.2° 08:55 | 7.44 | 18% | 57.6° |
| 2045-04-13 Thu | 63 | — | unknown | 02:35–05:05 (good, 2.5 h) | 87.2° 08:50 | 7.39 | 12% | 56.4° |
| 2045-04-14 Fri | 65 | — | unknown | 02:30–05:05 (good, 2.58 h) | 87.2° 08:45 | 7.33 | 6% | 57.0° |
| 2045-04-15 Sat | 65 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.2° 08:40 | 7.27 | 2% | 59.3° |
| 2045-04-16 Sun | 66 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.2° 08:40 | 7.21 | 0% | 63.3° |
| 2045-04-17 Mon | 66 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:35 | 7.15 | 1% | 68.7° |
| 2045-04-18 Tue | 68 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.2° 08:30 | 7.1 | 3% | 75.1° |
| 2045-04-19 Wed | 69 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.2° 08:25 | 7.04 | 8% | 82.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-03-21&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.