← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-10-20 Fri | 0 | — | unknown | — | 50.1° 11:50 | 10.05 | 78% | 145.5° |
| 2045-10-21 Sat | 0 | — | unknown | — | 50.1° 11:50 | 10.09 | 85% | 156.9° |
| 2045-10-22 Sun | 0 | — | unknown | — | 50.1° 11:45 | 10.13 | 91% | 167.3° |
| 2045-10-23 Mon | 0 | — | unknown | — | 50.1° 11:40 | 10.17 | 96% | 171.2° |
| 2045-10-24 Tue | 0 | — | unknown | — | 50.1° 11:35 | 10.21 | 99% | 162.8° |
| 2045-10-25 Wed | 0 | — | unknown | — | 50.1° 11:30 | 10.25 | 100% | 151.1° |
| 2045-10-26 Thu | 0 | — | unknown | — | 50.1° 11:30 | 10.29 | 99% | 138.6° |
| 2045-10-27 Fri | 0 | — | unknown | — | 50.1° 11:25 | 10.33 | 95% | 125.8° |
| 2045-10-28 Sat | 0 | — | unknown | — | 50.1° 10:20 | 10.37 | 90% | 112.6° |
| 2045-10-29 Sun | 0 | — | unknown | — | 50.1° 10:15 | 10.41 | 82% | 99.3° |
| 2045-10-30 Mon | 0 | — | unknown | — | 50.1° 10:10 | 10.44 | 73% | 85.7° |
| 2045-10-31 Tue | 0 | — | unknown | — | 50.1° 10:10 | 10.48 | 63% | 72.0° |
| 2045-11-01 Wed | 0 | — | unknown | — | 50.1° 10:05 | 10.52 | 52% | 58.2° |
| 2045-11-02 Thu | 0 | — | unknown | — | 50.1° 10:00 | 10.55 | 41% | 44.4° |
| 2045-11-03 Fri | 0 | — | unknown | — | 50.1° 09:55 | 10.59 | 30% | 30.6° |
| 2045-11-04 Sat | 1 | — | unknown | — | 50.1° 09:55 | 10.62 | 20% | 17.3° |
| 2045-11-05 Sun | 1 | — | unknown | — | 50.1° 09:50 | 10.66 | 11% | 8.5° |
| 2045-11-06 Mon | 1 | — | unknown | — | 50.1° 09:45 | 10.69 | 5% | 15.8° |
| 2045-11-07 Tue | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:40 | 10.72 | 1% | 28.8° |
| 2045-11-08 Wed | 3 | — | unknown | 05:50–06:05 (marginal, 0.25 h) | 50.1° 09:35 | 10.76 | 0% | 42.2° |
| 2045-11-09 Thu | 4 | — | unknown | 05:45–06:05 (marginal, 0.33 h) | 50.1° 09:35 | 10.79 | 1% | 55.7° |
| 2045-11-10 Fri | 5 | — | unknown | 05:40–06:05 (marginal, 0.42 h) | 50.1° 09:30 | 10.82 | 5% | 68.8° |
| 2045-11-11 Sat | 6 | — | unknown | 05:10–05:35 (marginal, 0.42 h) | 50.1° 09:25 | 10.85 | 10% | 81.7° |
| 2045-11-12 Sun | 7 | — | unknown | 05:05–06:05 (marginal, 1.0 h) | 50.1° 09:20 | 10.88 | 17% | 94.2° |
| 2045-11-13 Mon | 9 | — | unknown | 05:30–05:35 (good, 0.08 h) | 50.1° 09:15 | 10.91 | 25% | 106.4° |
| 2045-11-14 Tue | 10 | — | unknown | 05:25–05:35 (good, 0.17 h) | 50.1° 09:15 | 10.94 | 34% | 118.4° |
| 2045-11-15 Wed | 12 | — | unknown | 05:25–05:40 (good, 0.25 h) | 50.1° 09:10 | 10.97 | 43% | 130.1° |
| 2045-11-16 Thu | 14 | — | unknown | 05:20–05:40 (good, 0.33 h) | 50.1° 09:05 | 11.0 | 53% | 141.7° |
| 2045-11-17 Fri | 16 | — | unknown | 05:15–05:40 (good, 0.42 h) | 50.1° 09:00 | 11.03 | 62% | 153.0° |
| 2045-11-18 Sat | 17 | — | unknown | 05:10–05:40 (good, 0.5 h) | 50.1° 09:00 | 11.05 | 71% | 163.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-10-20&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.