← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-04-28 Tue | 0 | — | unknown | — | 79.2° 12:30 | 6.54 | 82% | 123.9° |
| 2043-04-29 Wed | 0 | — | unknown | — | 79.2° 12:30 | 6.49 | 74% | 112.5° |
| 2043-04-30 Thu | 0 | — | unknown | — | 79.2° 12:25 | 6.43 | 64% | 100.8° |
| 2043-05-01 Fri | 0 | — | unknown | — | 79.2° 12:20 | 6.37 | 55% | 88.8° |
| 2043-05-02 Sat | 0 | — | unknown | — | 79.2° 12:15 | 6.31 | 44% | 76.5° |
| 2043-05-03 Sun | 0 | — | unknown | — | 79.2° 12:15 | 6.25 | 34% | 63.8° |
| 2043-05-04 Mon | 0 | — | unknown | — | 79.2° 12:10 | 6.2 | 24% | 50.9° |
| 2043-05-05 Tue | 0 | — | unknown | — | 79.2° 12:05 | 6.14 | 15% | 37.9° |
| 2043-05-06 Wed | 0 | — | unknown | — | 79.2° 12:00 | 6.08 | 7% | 25.9° |
| 2043-05-07 Thu | 0 | — | unknown | — | 79.2° 11:55 | 6.03 | 2% | 17.7° |
| 2043-05-08 Fri | 0 | — | unknown | — | 79.2° 11:50 | 5.97 | 0% | 20.0° |
| 2043-05-09 Sat | 0 | — | unknown | — | 79.2° 11:45 | 5.91 | 1% | 30.6° |
| 2043-05-10 Sun | 0 | — | unknown | — | 79.2° 11:40 | 5.86 | 5% | 43.8° |
| 2043-05-11 Mon | 0 | — | unknown | — | 79.2° 11:35 | 5.8 | 12% | 57.4° |
| 2043-05-12 Tue | 0 | — | unknown | — | 79.2° 11:35 | 5.75 | 20% | 71.1° |
| 2043-05-13 Wed | 0 | — | unknown | — | 79.2° 11:30 | 5.69 | 30% | 84.4° |
| 2043-05-14 Thu | 0 | — | unknown | — | 79.2° 11:25 | 5.64 | 40% | 97.3° |
| 2043-05-15 Fri | 0 | — | unknown | — | 79.2° 11:20 | 5.58 | 50% | 109.7° |
| 2043-05-16 Sat | 0 | — | unknown | — | 79.2° 11:20 | 5.53 | 61% | 121.7° |
| 2043-05-17 Sun | 0 | — | unknown | — | 79.2° 11:15 | 5.48 | 70% | 133.3° |
| 2043-05-18 Mon | 0 | — | unknown | — | 79.2° 11:10 | 5.43 | 79% | 144.1° |
| 2043-05-19 Tue | 0 | — | unknown | — | 79.2° 11:05 | 5.38 | 86% | 153.9° |
| 2043-05-20 Wed | 0 | — | unknown | — | 79.2° 11:00 | 5.33 | 92% | 161.1° |
| 2043-05-21 Thu | 0 | — | unknown | — | 79.2° 11:00 | 5.28 | 96% | 162.5° |
| 2043-05-22 Fri | 0 | — | unknown | — | 79.2° 10:55 | 5.23 | 99% | 157.0° |
| 2043-05-23 Sat | 0 | — | unknown | — | 79.2° 10:50 | 5.18 | 100% | 148.0° |
| 2043-05-24 Sun | 0 | — | unknown | — | 79.2° 10:45 | 5.13 | 99% | 137.7° |
| 2043-05-25 Mon | 0 | — | unknown | — | 79.2° 10:40 | 5.09 | 96% | 126.7° |
| 2043-05-26 Tue | 0 | — | unknown | — | 79.2° 10:40 | 5.04 | 92% | 115.3° |
| 2043-05-27 Wed | 0 | — | unknown | — | 79.2° 10:35 | 5.0 | 86% | 103.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-04-28&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.