← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-10-17 Mon | 0 | — | unknown | — | 50.1° 12:05 | 9.93 | 11% | 19.5° |
| 2044-10-18 Tue | 0 | — | unknown | — | 50.1° 12:00 | 9.98 | 5% | 8.3° |
| 2044-10-19 Wed | 0 | — | unknown | — | 50.1° 11:55 | 10.02 | 1% | 11.3° |
| 2044-10-20 Thu | 0 | — | unknown | — | 50.1° 11:50 | 10.06 | 0% | 23.1° |
| 2044-10-21 Fri | 0 | — | unknown | — | 50.1° 11:45 | 10.1 | 1% | 35.7° |
| 2044-10-22 Sat | 0 | — | unknown | — | 50.1° 11:45 | 10.14 | 4% | 48.2° |
| 2044-10-23 Sun | 0 | — | unknown | — | 50.1° 11:40 | 10.18 | 9% | 60.5° |
| 2044-10-24 Mon | 0 | — | unknown | — | 50.1° 11:35 | 10.22 | 15% | 72.6° |
| 2044-10-25 Tue | 0 | — | unknown | — | 50.1° 11:30 | 10.26 | 23% | 84.5° |
| 2044-10-26 Wed | 0 | — | unknown | — | 50.1° 11:25 | 10.3 | 31% | 96.3° |
| 2044-10-27 Thu | 0 | — | unknown | — | 50.1° 11:25 | 10.34 | 40% | 108.0° |
| 2044-10-28 Fri | 0 | — | unknown | — | 50.1° 11:20 | 10.38 | 49% | 119.7° |
| 2044-10-29 Sat | 0 | — | unknown | — | 50.1° 10:15 | 10.41 | 59% | 131.6° |
| 2044-10-30 Sun | 0 | — | unknown | — | 50.1° 10:10 | 10.45 | 68% | 143.5° |
| 2044-10-31 Mon | 0 | — | unknown | — | 50.1° 10:05 | 10.49 | 77% | 155.6° |
| 2044-11-01 Tue | 0 | — | unknown | — | 50.1° 10:05 | 10.52 | 85% | 167.2° |
| 2044-11-02 Wed | 1 | — | unknown | — | 50.1° 10:00 | 10.56 | 92% | 172.6° |
| 2044-11-03 Thu | 1 | — | unknown | — | 50.1° 09:55 | 10.6 | 97% | 162.6° |
| 2044-11-04 Fri | 1 | — | unknown | — | 50.1° 09:50 | 10.63 | 99% | 149.4° |
| 2044-11-05 Sat | 1 | — | unknown | — | 50.1° 09:50 | 10.66 | 100% | 135.4° |
| 2044-11-06 Sun | 1 | — | unknown | — | 50.1° 09:45 | 10.7 | 97% | 121.1° |
| 2044-11-07 Mon | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:40 | 10.73 | 92% | 106.7° |
| 2044-11-08 Tue | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:35 | 10.76 | 84% | 92.2° |
| 2044-11-09 Wed | 2 | — | unknown | 05:25–05:30 (marginal, 0.08 h) | 50.1° 09:30 | 10.8 | 75% | 77.8° |
| 2044-11-10 Thu | 2 | — | unknown | 05:20–05:35 (marginal, 0.25 h) | 50.1° 09:30 | 10.83 | 65% | 63.5° |
| 2044-11-11 Fri | 3 | — | unknown | 05:15–05:35 (marginal, 0.33 h) | 50.1° 09:25 | 10.86 | 53% | 49.5° |
| 2044-11-12 Sat | 4 | — | unknown | 05:10–05:35 (marginal, 0.42 h) | 50.1° 09:20 | 10.89 | 42% | 35.8° |
| 2044-11-13 Sun | 6 | — | unknown | 05:00–05:35 (marginal, 0.58 h) | 50.1° 09:15 | 10.92 | 32% | 22.6° |
| 2044-11-14 Mon | 8 | — | unknown | 04:55–05:35 (marginal, 0.67 h) | 50.1° 09:10 | 10.95 | 22% | 10.7° |
| 2044-11-15 Tue | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 50.1° 09:10 | 10.98 | 14% | 8.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-10-17&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.