← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-03-25 Mon | 93 | — | unknown | 20:50–04:20 (good, 7.5 h) | 50.1° 00:35 | 8.44 | 44% | 96.5° |
| 2041-03-26 Tue | 93 | — | unknown | 20:45–04:20 (good, 7.58 h) | 50.1° 00:35 | 8.39 | 33% | 110.6° |
| 2041-03-27 Wed | 93 | — | unknown | 20:45–04:20 (good, 7.58 h) | 50.1° 00:30 | 8.33 | 23% | 125.0° |
| 2041-03-28 Thu | 93 | — | unknown | 20:40–04:15 (good, 7.58 h) | 50.1° 00:25 | 8.28 | 14% | 139.6° |
| 2041-03-29 Fri | 93 | — | unknown | 20:35–04:15 (good, 7.67 h) | 50.1° 00:20 | 8.23 | 7% | 154.4° |
| 2041-03-30 Sat | 93 | — | unknown | 20:30–05:10 (good, 7.67 h) | 50.1° 00:20 | 8.17 | 2% | 169.2° |
| 2041-03-31 Sun | 93 | — | unknown | 21:25–05:05 (good, 7.67 h) | 50.1° 01:15 | 8.12 | 0% | 175.7° |
| 2041-04-01 Mon | 93 | — | unknown | 21:25–05:00 (good, 7.58 h) | 50.1° 01:10 | 8.06 | 1% | 161.4° |
| 2041-04-02 Tue | 93 | — | unknown | 21:25–04:55 (good, 7.5 h) | 50.1° 01:05 | 8.01 | 5% | 147.2° |
| 2041-04-03 Wed | 93 | — | unknown | 21:30–04:55 (good, 7.42 h) | 50.1° 01:00 | 7.95 | 10% | 133.4° |
| 2041-04-04 Thu | 93 | — | unknown | 21:30–04:50 (good, 7.33 h) | 50.1° 01:00 | 7.9 | 18% | 120.1° |
| 2041-04-05 Fri | 93 | — | unknown | 21:30–04:45 (good, 7.25 h) | 50.1° 00:55 | 7.84 | 26% | 107.1° |
| 2041-04-06 Sat | 91 | — | unknown | 21:30–04:40 (good, 7.17 h) | 50.1° 00:50 | 7.78 | 36% | 94.6° |
| 2041-04-07 Sun | 87 | — | unknown | 21:35–04:40 (good, 7.08 h) | 50.1° 00:45 | 7.73 | 46% | 82.3° |
| 2041-04-08 Mon | 82 | — | unknown | 21:45–04:35 (good, 6.83 h) | 50.1° 00:40 | 7.67 | 55% | 70.3° |
| 2041-04-09 Tue | 66 | — | unknown | 23:30–04:10 (good, 4.67 h) | 50.1° 00:40 | 7.62 | 64% | 58.4° |
| 2041-04-10 Wed | 56 | — | unknown | 21:40–04:55 (marginal, 7.25 h) | 50.1° 00:35 | 7.56 | 73% | 46.6° |
| 2041-04-11 Thu | 38 | — | unknown | 21:40–04:40 (marginal, 7.0 h) | 50.1° 00:30 | 7.5 | 81% | 34.8° |
| 2041-04-12 Fri | 27 | — | unknown | 21:50–04:30 (marginal, 6.67 h) | 50.1° 00:25 | 7.44 | 88% | 22.9° |
| 2041-04-13 Sat | 22 | — | unknown | 23:40–04:15 (marginal, 4.58 h) | 50.1° 00:25 | 7.39 | 94% | 10.9° |
| 2041-04-14 Sun | 19 | — | unknown | 00:40–04:00 (marginal, 3.33 h) | 50.1° 00:20 | 7.33 | 98% | 2.1° |
| 2041-04-15 Mon | 21 | — | unknown | 21:45–03:45 (marginal, 6.0 h) | 50.1° 00:15 | 7.27 | 100% | 14.0° |
| 2041-04-16 Tue | 26 | — | unknown | 21:45–03:40 (marginal, 5.92 h) | 50.1° 00:10 | 7.21 | 100% | 26.7° |
| 2041-04-17 Wed | 41 | — | unknown | 21:50–03:55 (marginal, 6.08 h) | 50.1° 00:05 | 7.16 | 98% | 39.6° |
| 2041-04-18 Thu | 90 | — | unknown | 21:50–23:50 (good, 2.0 h) | 50.1° 00:05 | 7.1 | 94% | 52.7° |
| 2041-04-19 Fri | 93 | — | unknown | 21:50–02:15 (good, 4.42 h) | 50.1° 00:00 | 7.04 | 88% | 66.0° |
| 2041-04-20 Sat | 93 | — | unknown | 21:55–03:20 (good, 5.42 h) | 50.1° 23:55 | 6.98 | 79% | 79.5° |
| 2041-04-21 Sun | 93 | — | unknown | 21:55–03:30 (good, 5.58 h) | 50.1° 23:50 | 6.92 | 70% | 93.2° |
| 2041-04-22 Mon | 93 | — | unknown | 21:55–03:30 (good, 5.58 h) | 50.1° 23:45 | 6.87 | 59% | 107.1° |
| 2041-04-23 Tue | 93 | — | unknown | 21:55–03:35 (good, 5.67 h) | 50.1° 23:45 | 6.81 | 48% | 121.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-03-25&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.