← 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. |
|---|---|---|---|---|---|---|---|---|
| 2034-08-16 Wed | 0 | — | unknown | — | 42.9° 09:15 | 6.7 | 8% | 94.1° |
| 2034-08-17 Thu | 0 | — | unknown | — | 42.9° 09:10 | 6.76 | 15% | 105.5° |
| 2034-08-18 Fri | 0 | — | unknown | — | 42.9° 09:05 | 6.82 | 22% | 116.6° |
| 2034-08-19 Sat | 1 | — | unknown | — | 42.9° 09:05 | 6.88 | 31% | 127.2° |
| 2034-08-20 Sun | 1 | — | unknown | — | 42.9° 09:00 | 6.93 | 40% | 137.2° |
| 2034-08-21 Mon | 1 | — | unknown | — | 42.9° 08:55 | 6.99 | 49% | 146.2° |
| 2034-08-22 Tue | 1 | — | unknown | — | 42.9° 08:50 | 7.05 | 58% | 153.3° |
| 2034-08-23 Wed | 1 | — | unknown | — | 42.9° 08:50 | 7.11 | 68% | 156.5° |
| 2034-08-24 Thu | 2 | — | unknown | 05:30–05:40 (marginal, 0.17 h) | 42.9° 08:45 | 7.16 | 77% | 154.3° |
| 2034-08-25 Fri | 3 | — | unknown | 05:25–05:40 (marginal, 0.25 h) | 42.9° 08:40 | 7.22 | 84% | 147.4° |
| 2034-08-26 Sat | 4 | — | unknown | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.28 | 91% | 137.8° |
| 2034-08-27 Sun | 5 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.33 | 96% | 126.8° |
| 2034-08-28 Mon | 5 | — | unknown | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.39 | 99% | 114.9° |
| 2034-08-29 Tue | 5 | — | unknown | 04:40–05:10 (marginal, 0.5 h) | 42.9° 08:25 | 7.45 | 100% | 102.4° |
| 2034-08-30 Wed | 5 | — | unknown | 04:40–05:10 (marginal, 0.5 h) | 42.9° 08:20 | 7.5 | 98% | 89.5° |
| 2034-08-31 Thu | 4 | — | unknown | 04:45–05:10 (marginal, 0.42 h) | 42.9° 08:15 | 7.56 | 94% | 76.4° |
| 2034-09-01 Fri | 4 | — | unknown | 04:50–05:10 (marginal, 0.33 h) | 42.9° 08:10 | 7.61 | 87% | 63.4° |
| 2034-09-02 Sat | 4 | — | unknown | 04:50–05:15 (marginal, 0.42 h) | 42.9° 08:10 | 7.67 | 78% | 50.8° |
| 2034-09-03 Sun | 4 | — | unknown | 04:45–05:15 (marginal, 0.5 h) | 42.9° 08:05 | 7.73 | 68% | 39.0° |
| 2034-09-04 Mon | 6 | — | unknown | 04:30–05:15 (marginal, 0.75 h) | 42.9° 08:00 | 7.78 | 56% | 29.1° |
| 2034-09-05 Tue | 9 | — | unknown | 04:15–05:15 (marginal, 1.0 h) | 42.9° 07:55 | 7.84 | 45% | 23.7° |
| 2034-09-06 Wed | 13 | — | unknown | 05:05–05:20 (good, 0.25 h) | 42.9° 07:55 | 7.89 | 34% | 25.4° |
| 2034-09-07 Thu | 17 | — | unknown | 04:50–05:20 (good, 0.5 h) | 42.9° 07:50 | 7.95 | 24% | 33.0° |
| 2034-09-08 Fri | 21 | — | unknown | 04:35–05:20 (good, 0.75 h) | 42.9° 07:45 | 8.0 | 15% | 43.4° |
| 2034-09-09 Sat | 25 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:40 | 8.05 | 8% | 54.8° |
| 2034-09-10 Sun | 28 | — | unknown | 04:25–05:25 (good, 1.0 h) | 42.9° 07:35 | 8.11 | 3% | 66.6° |
| 2034-09-11 Mon | 29 | — | unknown | 04:20–05:25 (good, 1.08 h) | 42.9° 07:35 | 8.16 | 1% | 78.4° |
| 2034-09-12 Tue | 30 | — | unknown | 04:15–05:25 (good, 1.17 h) | 42.9° 07:30 | 8.22 | 0% | 90.1° |
| 2034-09-13 Wed | 33 | — | unknown | 04:10–05:30 (good, 1.33 h) | 42.9° 07:25 | 8.27 | 2% | 101.6° |
| 2034-09-14 Thu | 35 | — | unknown | 04:05–05:30 (good, 1.42 h) | 42.9° 07:20 | 8.32 | 5% | 112.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2034-08-16&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.