← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-08-12 Sat | 0 | — | unknown | — | 42.9° 09:30 | 6.49 | 0% | 64.3° |
| 2045-08-13 Sun | 0 | — | unknown | — | 42.9° 09:25 | 6.55 | 2% | 76.7° |
| 2045-08-14 Mon | 0 | — | unknown | — | 42.9° 09:20 | 6.61 | 7% | 89.2° |
| 2045-08-15 Tue | 0 | — | unknown | — | 42.9° 09:20 | 6.67 | 14% | 101.4° |
| 2045-08-16 Wed | 0 | — | unknown | — | 42.9° 09:15 | 6.72 | 24% | 113.0° |
| 2045-08-17 Thu | 0 | — | unknown | — | 42.9° 09:10 | 6.78 | 34% | 123.8° |
| 2045-08-18 Fri | 0 | — | unknown | — | 42.9° 09:05 | 6.84 | 44% | 133.2° |
| 2045-08-19 Sat | 1 | — | unknown | — | 42.9° 09:05 | 6.9 | 55% | 140.8° |
| 2045-08-20 Sun | 1 | — | unknown | — | 42.9° 09:00 | 6.95 | 64% | 145.6° |
| 2045-08-21 Mon | 1 | — | unknown | — | 42.9° 08:55 | 7.01 | 74% | 146.7° |
| 2045-08-22 Tue | 1 | — | unknown | — | 42.9° 08:50 | 7.07 | 82% | 144.0° |
| 2045-08-23 Wed | 2 | — | unknown | — | 42.9° 08:45 | 7.13 | 88% | 138.3° |
| 2045-08-24 Thu | 2 | — | unknown | 05:30–05:40 (marginal, 0.17 h) | 42.9° 08:45 | 7.18 | 94% | 130.8° |
| 2045-08-25 Fri | 3 | — | unknown | 05:25–05:40 (marginal, 0.25 h) | 42.9° 08:40 | 7.24 | 98% | 122.1° |
| 2045-08-26 Sat | 3 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.3 | 100% | 112.9° |
| 2045-08-27 Sun | 3 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.35 | 100% | 103.2° |
| 2045-08-28 Mon | 4 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:25 | 7.41 | 98% | 93.2° |
| 2045-08-29 Tue | 3 | — | unknown | 04:45–05:10 (marginal, 0.42 h) | 42.9° 08:25 | 7.47 | 95% | 83.1° |
| 2045-08-30 Wed | 3 | — | unknown | 04:50–05:10 (marginal, 0.33 h) | 42.9° 08:20 | 7.52 | 90% | 73.1° |
| 2045-08-31 Thu | 3 | — | unknown | 04:50–05:10 (marginal, 0.33 h) | 42.9° 08:15 | 7.58 | 83% | 63.1° |
| 2045-09-01 Fri | 4 | — | unknown | 04:50–05:15 (marginal, 0.42 h) | 42.9° 08:10 | 7.63 | 75% | 53.5° |
| 2045-09-02 Sat | 5 | — | unknown | 04:45–05:15 (marginal, 0.5 h) | 42.9° 08:10 | 7.69 | 66% | 44.8° |
| 2045-09-03 Sun | 6 | — | unknown | 04:30–05:15 (marginal, 0.75 h) | 42.9° 08:05 | 7.74 | 55% | 37.7° |
| 2045-09-04 Mon | 8 | — | unknown | 04:20–05:15 (marginal, 0.92 h) | 42.9° 08:00 | 7.8 | 44% | 33.6° |
| 2045-09-05 Tue | 13 | — | unknown | 05:10–05:20 (good, 0.17 h) | 42.9° 07:55 | 7.86 | 34% | 34.1° |
| 2045-09-06 Wed | 17 | — | unknown | 04:50–05:20 (good, 0.5 h) | 42.9° 07:50 | 7.91 | 23% | 39.4° |
| 2045-09-07 Thu | 20 | — | unknown | 04:40–05:20 (good, 0.67 h) | 42.9° 07:50 | 7.96 | 14% | 48.1° |
| 2045-09-08 Fri | 23 | — | unknown | 04:30–05:20 (good, 0.83 h) | 42.9° 07:45 | 8.02 | 7% | 59.0° |
| 2045-09-09 Sat | 27 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:40 | 8.07 | 2% | 71.0° |
| 2045-09-10 Sun | 28 | — | unknown | 04:20–05:25 (good, 1.08 h) | 42.9° 07:35 | 8.13 | 0% | 83.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-08-12&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.