← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-24 Sun | 25 | — | unknown | 03:30–04:45 (good, 1.25 h) | 71.1° 08:10 | 8.49 | 56% | 58.6° |
| 2041-03-25 Mon | 28 | — | unknown | 03:20–04:40 (good, 1.33 h) | 71.1° 08:05 | 8.44 | 44% | 52.4° |
| 2041-03-26 Tue | 36 | — | unknown | 03:00–04:40 (good, 1.67 h) | 71.1° 08:05 | 8.39 | 33% | 48.4° |
| 2041-03-27 Wed | 42 | — | unknown | 03:00–04:40 (good, 1.67 h) | 71.1° 08:00 | 8.33 | 23% | 47.3° |
| 2041-03-28 Thu | 43 | — | unknown | 02:55–04:35 (good, 1.67 h) | 71.1° 07:55 | 8.28 | 14% | 49.6° |
| 2041-03-29 Fri | 44 | — | unknown | 02:50–04:35 (good, 1.75 h) | 71.1° 07:50 | 8.23 | 7% | 54.9° |
| 2041-03-30 Sat | 45 | — | unknown | 02:45–05:35 (good, 1.83 h) | 71.1° 08:50 | 8.17 | 2% | 62.4° |
| 2041-03-31 Sun | 46 | — | unknown | 03:40–05:30 (good, 1.83 h) | 71.1° 08:45 | 8.12 | 0% | 71.2° |
| 2041-04-01 Mon | 47 | — | unknown | 03:40–05:30 (good, 1.83 h) | 71.1° 08:40 | 8.06 | 1% | 80.6° |
| 2041-04-02 Tue | 47 | — | unknown | 03:35–05:25 (good, 1.83 h) | 71.1° 08:35 | 8.01 | 5% | 90.2° |
| 2041-04-03 Wed | 48 | — | unknown | 03:30–05:25 (good, 1.92 h) | 71.1° 08:30 | 7.95 | 10% | 99.5° |
| 2041-04-04 Thu | 50 | — | unknown | 03:25–05:25 (good, 2.0 h) | 71.1° 08:30 | 7.9 | 18% | 108.2° |
| 2041-04-05 Fri | 50 | — | unknown | 03:25–05:20 (good, 1.92 h) | 71.1° 08:25 | 7.84 | 26% | 116.1° |
| 2041-04-06 Sat | 52 | — | unknown | 03:20–05:20 (good, 2.0 h) | 71.1° 08:20 | 7.78 | 36% | 122.7° |
| 2041-04-07 Sun | 51 | — | unknown | 03:15–05:15 (good, 2.0 h) | 71.1° 08:15 | 7.73 | 46% | 128.0° |
| 2041-04-08 Mon | 52 | — | unknown | 03:15–05:15 (good, 2.0 h) | 71.1° 08:10 | 7.67 | 55% | 131.4° |
| 2041-04-09 Tue | 53 | — | unknown | 03:10–05:15 (good, 2.08 h) | 71.1° 08:10 | 7.62 | 64% | 132.6° |
| 2041-04-10 Wed | 51 | — | unknown | 03:10–05:10 (good, 2.0 h) | 71.1° 08:05 | 7.56 | 73% | 131.7° |
| 2041-04-11 Thu | 48 | — | unknown | 03:05–05:10 (good, 2.08 h) | 71.1° 08:00 | 7.5 | 81% | 128.6° |
| 2041-04-12 Fri | 47 | — | unknown | 03:05–05:05 (good, 2.0 h) | 71.1° 07:55 | 7.44 | 88% | 123.8° |
| 2041-04-13 Sat | 46 | — | unknown | 03:05–05:05 (good, 2.0 h) | 71.1° 07:55 | 7.39 | 94% | 117.6° |
| 2041-04-14 Sun | 43 | — | unknown | 03:05–05:05 (good, 2.0 h) | 71.1° 07:50 | 7.33 | 98% | 110.4° |
| 2041-04-15 Mon | 38 | — | unknown | 03:05–05:00 (good, 1.92 h) | 71.1° 07:45 | 7.27 | 100% | 102.4° |
| 2041-04-16 Tue | 35 | — | unknown | 03:20–05:00 (good, 1.67 h) | 71.1° 07:40 | 7.21 | 100% | 94.0° |
| 2041-04-17 Wed | 31 | — | unknown | 03:45–04:55 (good, 1.17 h) | 71.1° 07:35 | 7.16 | 98% | 85.2° |
| 2041-04-18 Thu | 30 | — | unknown | 04:00–04:55 (good, 0.92 h) | 71.1° 07:35 | 7.1 | 94% | 76.5° |
| 2041-04-19 Fri | 29 | — | unknown | 04:00–04:55 (good, 0.92 h) | 71.1° 07:30 | 7.04 | 88% | 68.0° |
| 2041-04-20 Sat | 31 | — | unknown | 03:40–04:50 (good, 1.17 h) | 71.1° 07:25 | 6.98 | 79% | 60.3° |
| 2041-04-21 Sun | 34 | — | unknown | 02:45–04:50 (good, 2.08 h) | 71.1° 07:20 | 6.92 | 70% | 53.8° |
| 2041-04-22 Mon | 47 | — | unknown | 02:15–04:50 (good, 2.58 h) | 71.1° 07:15 | 6.87 | 59% | 49.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-24&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.