← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-04-09 Thu | 0 | — | unknown | — | 79.2° 13:45 | 7.64 | 0% | 21.3° |
| 2043-04-10 Fri | 0 | — | unknown | — | 79.2° 13:45 | 7.59 | 2% | 17.2° |
| 2043-04-11 Sat | 0 | — | unknown | — | 79.2° 13:40 | 7.53 | 7% | 24.2° |
| 2043-04-12 Sun | 0 | — | unknown | — | 79.2° 13:35 | 7.47 | 14% | 36.1° |
| 2043-04-13 Mon | 0 | — | unknown | — | 79.2° 13:30 | 7.41 | 23% | 49.2° |
| 2043-04-14 Tue | 0 | — | unknown | — | 79.2° 13:25 | 7.36 | 34% | 62.4° |
| 2043-04-15 Wed | 0 | — | unknown | — | 79.2° 13:25 | 7.3 | 45% | 75.5° |
| 2043-04-16 Thu | 0 | — | unknown | — | 79.2° 13:20 | 7.24 | 55% | 88.3° |
| 2043-04-17 Fri | 0 | — | unknown | — | 79.2° 13:15 | 7.18 | 66% | 100.7° |
| 2043-04-18 Sat | 0 | — | unknown | — | 79.2° 13:10 | 7.13 | 75% | 112.9° |
| 2043-04-19 Sun | 0 | — | unknown | — | 79.2° 13:10 | 7.07 | 83% | 124.6° |
| 2043-04-20 Mon | 0 | — | unknown | — | 79.2° 13:05 | 7.01 | 90% | 135.9° |
| 2043-04-21 Tue | 0 | — | unknown | — | 79.2° 13:00 | 6.95 | 95% | 146.6° |
| 2043-04-22 Wed | 0 | — | unknown | — | 79.2° 12:55 | 6.89 | 98% | 156.0° |
| 2043-04-23 Thu | 0 | — | unknown | — | 79.2° 12:50 | 6.84 | 100% | 162.1° |
| 2043-04-24 Fri | 0 | — | unknown | — | 79.2° 12:50 | 6.78 | 100% | 161.7° |
| 2043-04-25 Sat | 0 | — | unknown | — | 79.2° 12:45 | 6.72 | 98% | 155.0° |
| 2043-04-26 Sun | 0 | — | unknown | — | 79.2° 12:40 | 6.66 | 94% | 145.5° |
| 2043-04-27 Mon | 0 | — | unknown | — | 79.2° 12:35 | 6.6 | 88% | 135.0° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-04-09&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.