← 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. |
|---|---|---|---|---|---|---|---|---|
| 2034-04-18 Tue | 0 | — | unknown | — | 89.7° 12:20 | 7.12 | 0% | 35.9° |
| 2034-04-19 Wed | 0 | — | unknown | — | 89.7° 12:15 | 7.06 | 2% | 40.7° |
| 2034-04-20 Thu | 0 | — | unknown | — | 89.6° 12:10 | 7.0 | 7% | 49.1° |
| 2034-04-21 Fri | 0 | — | unknown | — | 89.5° 12:10 | 6.94 | 14% | 59.4° |
| 2034-04-22 Sat | 0 | — | unknown | — | 89.8° 12:00 | 6.88 | 23% | 70.5° |
| 2034-04-23 Sun | 0 | — | unknown | — | 89.8° 12:00 | 6.83 | 33% | 81.7° |
| 2034-04-24 Mon | 0 | — | unknown | — | 89.6° 11:50 | 6.77 | 44% | 92.7° |
| 2034-04-25 Tue | 1 | — | unknown | — | 89.5° 11:50 | 6.71 | 55% | 103.4° |
| 2034-04-26 Wed | 1 | — | unknown | — | 89.7° 11:45 | 6.65 | 65% | 113.5° |
| 2034-04-27 Thu | 1 | — | unknown | — | 89.8° 11:40 | 6.59 | 74% | 122.9° |
| 2034-04-28 Fri | 1 | — | unknown | — | 89.7° 11:35 | 6.53 | 82% | 131.2° |
| 2034-04-29 Sat | 1 | — | unknown | — | 89.5° 11:30 | 6.48 | 89% | 138.2° |
| 2034-04-30 Sun | 1 | — | unknown | — | 89.6° 11:30 | 6.42 | 94% | 142.9° |
| 2034-05-01 Mon | 1 | — | unknown | — | 89.7° 11:25 | 6.36 | 98% | 144.6° |
| 2034-05-02 Tue | 1 | — | unknown | — | 89.8° 11:20 | 6.3 | 100% | 142.9° |
| 2034-05-03 Wed | 1 | — | unknown | — | 89.6° 11:15 | 6.24 | 100% | 138.3° |
| 2034-05-04 Thu | 1 | — | unknown | — | 89.5° 11:15 | 6.19 | 98% | 131.6° |
| 2034-05-05 Fri | 1 | — | unknown | — | 89.6° 11:10 | 6.13 | 95% | 123.5° |
| 2034-05-06 Sat | 1 | — | unknown | — | 89.8° 11:05 | 6.07 | 90% | 114.5° |
| 2034-05-07 Sun | 1 | — | unknown | — | 89.7° 11:00 | 6.02 | 83% | 105.0° |
| 2034-05-08 Mon | 1 | — | unknown | — | 89.6° 10:55 | 5.96 | 75% | 95.1° |
| 2034-05-09 Tue | 1 | — | unknown | — | 89.5° 10:55 | 5.9 | 66% | 84.8° |
| 2034-05-10 Wed | 2 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.7° 10:50 | 5.85 | 56% | 74.5° |
| 2034-05-11 Thu | 2 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.8° 10:45 | 5.79 | 45% | 64.2° |
| 2034-05-12 Fri | 3 | — | unknown | 04:05–04:10 (marginal, 0.08 h) | 89.7° 10:40 | 5.74 | 34% | 54.2° |
| 2034-05-13 Sat | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.5° 10:35 | 5.68 | 24% | 45.2° |
| 2034-05-14 Sun | 5 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.6° 10:35 | 5.63 | 15% | 38.3° |
| 2034-05-15 Mon | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.7° 10:30 | 5.57 | 7% | 35.5° |
| 2034-05-16 Tue | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.52 | 2% | 37.9° |
| 2034-05-17 Wed | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.6° 10:20 | 5.47 | 0% | 44.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2034-04-18&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.