← 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. |
|---|---|---|---|---|---|---|---|---|
| 2035-05-12 Sat | 0 | — | unknown | — | 79.1° 11:35 | 5.75 | 33% | 90.5° |
| 2035-05-13 Sun | 0 | — | unknown | — | 79.1° 11:30 | 5.7 | 44% | 103.3° |
| 2035-05-14 Mon | 0 | — | unknown | — | 79.1° 11:25 | 5.64 | 55% | 115.6° |
| 2035-05-15 Tue | 0 | — | unknown | — | 79.1° 11:20 | 5.59 | 66% | 127.3° |
| 2035-05-16 Wed | 0 | — | unknown | — | 79.1° 11:15 | 5.53 | 75% | 138.2° |
| 2035-05-17 Thu | 0 | — | unknown | — | 79.1° 11:15 | 5.48 | 83% | 147.7° |
| 2035-05-18 Fri | 0 | — | unknown | — | 79.1° 11:10 | 5.43 | 90% | 154.6° |
| 2035-05-19 Sat | 0 | — | unknown | — | 79.1° 11:05 | 5.38 | 95% | 156.7° |
| 2035-05-20 Sun | 0 | — | unknown | — | 79.1° 11:00 | 5.33 | 98% | 153.1° |
| 2035-05-21 Mon | 0 | — | unknown | — | 79.1° 11:00 | 5.28 | 100% | 145.7° |
| 2035-05-22 Tue | 0 | — | unknown | — | 79.1° 10:55 | 5.23 | 99% | 136.5° |
| 2035-05-23 Wed | 0 | — | unknown | — | 79.1° 10:50 | 5.18 | 97% | 126.4° |
| 2035-05-24 Thu | 0 | — | unknown | — | 79.1° 10:45 | 5.14 | 93% | 116.0° |
| 2035-05-25 Fri | 0 | — | unknown | — | 79.1° 10:40 | 5.09 | 88% | 105.3° |
| 2035-05-26 Sat | 0 | — | unknown | — | 79.1° 10:40 | 5.05 | 81% | 94.4° |
| 2035-05-27 Sun | 0 | — | unknown | — | 79.1° 10:35 | 5.0 | 73% | 83.3° |
| 2035-05-28 Mon | 0 | — | unknown | — | 79.1° 10:30 | 4.96 | 64% | 72.2° |
| 2035-05-29 Tue | 0 | — | unknown | — | 79.1° 10:25 | 4.92 | 54% | 61.0° |
| 2035-05-30 Wed | 0 | — | unknown | — | 79.1° 10:20 | 4.88 | 44% | 49.9° |
| 2035-05-31 Thu | 1 | — | unknown | — | 79.1° 10:20 | 4.84 | 33% | 39.1° |
| 2035-06-01 Fri | 1 | — | unknown | — | 79.1° 10:15 | 4.8 | 24% | 29.6° |
| 2035-06-02 Sat | 1 | — | unknown | — | 79.1° 10:10 | 4.77 | 15% | 23.8° |
| 2035-06-03 Sun | 1 | — | unknown | — | 79.1° 10:05 | 4.73 | 7% | 25.3° |
| 2035-06-04 Mon | 1 | — | unknown | — | 79.1° 10:05 | 4.7 | 2% | 33.6° |
| 2035-06-05 Tue | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.1° 10:00 | 4.67 | 0% | 45.3° |
| 2035-06-06 Wed | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.1° 09:55 | 4.64 | 1% | 58.5° |
| 2035-06-07 Thu | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.1° 09:50 | 4.61 | 5% | 72.1° |
| 2035-06-08 Fri | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:45 | 4.59 | 12% | 85.7° |
| 2035-06-09 Sat | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:45 | 4.56 | 20% | 99.1° |
| 2035-06-10 Sun | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:40 | 4.54 | 30% | 112.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2035-05-12&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.