← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-10-19 Sat | 0 | — | unknown | — | 50.1° 11:55 | 10.01 | 22% | 35.3° |
| 2041-10-20 Sun | 0 | — | unknown | — | 50.1° 11:50 | 10.05 | 15% | 23.6° |
| 2041-10-21 Mon | 0 | — | unknown | — | 50.1° 11:50 | 10.09 | 9% | 11.8° |
| 2041-10-22 Tue | 0 | — | unknown | — | 50.1° 11:45 | 10.13 | 4% | 2.1° |
| 2041-10-23 Wed | 0 | — | unknown | — | 50.1° 11:40 | 10.17 | 1% | 12.6° |
| 2041-10-24 Thu | 0 | — | unknown | — | 50.1° 11:35 | 10.21 | 0% | 24.7° |
| 2041-10-25 Fri | 0 | — | unknown | — | 50.1° 11:30 | 10.25 | 1% | 37.1° |
| 2041-10-26 Sat | 0 | — | unknown | — | 50.1° 10:30 | 10.29 | 3% | 49.7° |
| 2041-10-27 Sun | 0 | — | unknown | — | 50.1° 10:25 | 10.33 | 8% | 62.5° |
| 2041-10-28 Mon | 0 | — | unknown | — | 50.1° 10:20 | 10.37 | 15% | 75.5° |
| 2041-10-29 Tue | 0 | — | unknown | — | 50.1° 10:15 | 10.4 | 23% | 88.7° |
| 2041-10-30 Wed | 0 | — | unknown | — | 50.1° 10:10 | 10.44 | 33% | 102.1° |
| 2041-10-31 Thu | 0 | — | unknown | — | 50.1° 10:10 | 10.48 | 44% | 115.7° |
| 2041-11-01 Fri | 0 | — | unknown | — | 50.1° 10:05 | 10.51 | 55% | 129.6° |
| 2041-11-02 Sat | 0 | — | unknown | — | 50.1° 10:00 | 10.55 | 66% | 143.8° |
| 2041-11-03 Sun | 1 | — | unknown | — | 50.1° 09:55 | 10.59 | 76% | 158.1° |
| 2041-11-04 Mon | 1 | — | unknown | — | 50.1° 09:55 | 10.62 | 86% | 172.5° |
| 2041-11-05 Tue | 1 | — | unknown | — | 50.1° 09:50 | 10.66 | 93% | 172.3° |
| 2041-11-06 Wed | 1 | — | unknown | — | 50.1° 09:45 | 10.69 | 98% | 157.9° |
| 2041-11-07 Thu | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:40 | 10.72 | 100% | 143.4° |
| 2041-11-08 Fri | 3 | — | unknown | 05:20–05:30 (marginal, 0.17 h) | 50.1° 09:35 | 10.76 | 99% | 129.1° |
| 2041-11-09 Sat | 3 | — | unknown | 05:20–05:30 (marginal, 0.17 h) | 50.1° 09:35 | 10.79 | 96% | 115.1° |
| 2041-11-10 Sun | 3 | — | unknown | 05:15–05:30 (marginal, 0.25 h) | 50.1° 09:30 | 10.82 | 91% | 101.6° |
| 2041-11-11 Mon | 3 | — | unknown | 05:15–05:35 (marginal, 0.33 h) | 50.1° 09:25 | 10.85 | 84% | 88.4° |
| 2041-11-12 Tue | 3 | — | unknown | 05:15–05:35 (marginal, 0.33 h) | 50.1° 09:20 | 10.88 | 76% | 75.6° |
| 2041-11-13 Wed | 4 | — | unknown | 05:15–05:35 (marginal, 0.33 h) | 50.1° 09:15 | 10.91 | 67% | 63.2° |
| 2041-11-14 Thu | 4 | — | unknown | 05:05–05:35 (marginal, 0.5 h) | 50.1° 09:15 | 10.94 | 57% | 51.0° |
| 2041-11-15 Fri | 6 | — | unknown | 05:00–05:40 (marginal, 0.67 h) | 50.1° 09:10 | 10.97 | 48% | 39.1° |
| 2041-11-16 Sat | 7 | — | unknown | 04:50–05:40 (marginal, 0.83 h) | 50.1° 09:05 | 11.0 | 38% | 27.3° |
| 2041-11-17 Sun | 10 | — | unknown | 05:35–05:40 (good, 0.08 h) | 50.1° 09:00 | 11.03 | 29% | 15.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-10-19&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.