← 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. |
|---|---|---|---|---|---|---|---|---|
| 2033-04-21 Thu | 0 | — | unknown | — | 89.6° 12:05 | 6.93 | 56% | 89.4° |
| 2033-04-22 Fri | 0 | — | unknown | — | 89.7° 12:00 | 6.87 | 45% | 78.1° |
| 2033-04-23 Sat | 0 | — | unknown | — | 89.8° 11:55 | 6.81 | 34% | 66.8° |
| 2033-04-24 Sun | 0 | — | unknown | — | 89.7° 11:50 | 6.75 | 24% | 55.8° |
| 2033-04-25 Mon | 0 | — | unknown | — | 89.6° 11:45 | 6.69 | 14% | 45.7° |
| 2033-04-26 Tue | 1 | — | unknown | — | 89.6° 11:45 | 6.64 | 7% | 37.7° |
| 2033-04-27 Wed | 1 | — | unknown | — | 89.7° 11:40 | 6.58 | 2% | 33.9° |
| 2033-04-28 Thu | 1 | — | unknown | — | 89.8° 11:35 | 6.52 | 0% | 35.7° |
| 2033-04-29 Fri | 1 | — | unknown | — | 89.7° 11:30 | 6.46 | 1% | 42.1° |
| 2033-04-30 Sat | 1 | — | unknown | — | 89.5° 11:25 | 6.4 | 5% | 51.4° |
| 2033-05-01 Sun | 1 | — | unknown | — | 89.6° 11:25 | 6.35 | 11% | 61.8° |
| 2033-05-02 Mon | 1 | — | unknown | — | 89.7° 11:20 | 6.29 | 18% | 72.6° |
| 2033-05-03 Tue | 1 | — | unknown | — | 89.7° 11:15 | 6.23 | 27% | 83.4° |
| 2033-05-04 Wed | 1 | — | unknown | — | 89.6° 11:10 | 6.17 | 37% | 94.0° |
| 2033-05-05 Thu | 2 | — | unknown | — | 89.5° 11:10 | 6.12 | 46% | 104.3° |
| 2033-05-06 Fri | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.7° 11:05 | 6.06 | 56% | 114.1° |
| 2033-05-07 Sat | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.8° 11:00 | 6.0 | 66% | 123.3° |
| 2033-05-08 Sun | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.7° 10:55 | 5.95 | 74% | 131.7° |
| 2033-05-09 Mon | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.6° 10:50 | 5.89 | 82% | 138.9° |
| 2033-05-10 Tue | 3 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.5° 10:50 | 5.83 | 89% | 144.0° |
| 2033-05-11 Wed | 3 | — | unknown | 04:05–04:15 (marginal, 0.17 h) | 89.7° 10:45 | 5.78 | 94% | 146.2° |
| 2033-05-12 Thu | 3 | — | unknown | 04:45–04:55 (marginal, 0.17 h) | 89.8° 10:40 | 5.72 | 98% | 144.6° |
| 2033-05-13 Fri | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.7° 10:35 | 5.67 | 100% | 139.8° |
| 2033-05-14 Sat | 4 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.5° 10:30 | 5.62 | 100% | 132.4° |
| 2033-05-15 Sun | 4 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.6° 10:30 | 5.56 | 98% | 123.5° |
| 2033-05-16 Mon | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.7° 10:25 | 5.51 | 94% | 113.6° |
| 2033-05-17 Tue | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.7° 10:20 | 5.46 | 87% | 103.0° |
| 2033-05-18 Wed | 4 | — | unknown | 03:40–04:00 (marginal, 0.33 h) | 89.6° 10:15 | 5.41 | 80% | 92.0° |
| 2033-05-19 Thu | 4 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.5° 10:15 | 5.35 | 70% | 80.9° |
| 2033-05-20 Fri | 5 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.6° 10:10 | 5.3 | 60% | 69.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2033-04-21&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.