← 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. |
|---|---|---|---|---|---|---|---|---|
| 2033-04-18 Mon | 37 | — | unknown | 02:50–04:55 (good, 2.08 h) | 87.3° 08:30 | 7.1 | 84% | 82.9° |
| 2033-04-19 Tue | 38 | — | unknown | 02:45–04:55 (good, 2.17 h) | 87.3° 08:25 | 7.04 | 76% | 75.6° |
| 2033-04-20 Wed | 40 | — | unknown | 02:35–04:50 (good, 2.25 h) | 87.3° 08:25 | 6.99 | 67% | 68.7° |
| 2033-04-21 Thu | 46 | — | unknown | 02:25–04:50 (good, 2.42 h) | 87.3° 08:20 | 6.93 | 56% | 62.6° |
| 2033-04-22 Fri | 55 | — | unknown | 02:00–04:50 (good, 2.83 h) | 87.3° 08:15 | 6.87 | 45% | 57.6° |
| 2033-04-23 Sat | 62 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.3° 08:10 | 6.81 | 34% | 54.5° |
| 2033-04-24 Sun | 70 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.3° 08:05 | 6.75 | 24% | 53.8° |
| 2033-04-25 Mon | 73 | — | unknown | 01:50–04:40 (good, 2.83 h) | 87.3° 08:05 | 6.69 | 14% | 55.7° |
| 2033-04-26 Tue | 76 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.3° 08:00 | 6.64 | 7% | 60.1° |
| 2033-04-27 Wed | 78 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.3° 07:55 | 6.58 | 2% | 66.5° |
| 2033-04-28 Thu | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:50 | 6.52 | 0% | 74.2° |
| 2033-04-29 Fri | 79 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:45 | 6.46 | 1% | 82.5° |
| 2033-04-30 Sat | 81 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.3° 07:45 | 6.4 | 5% | 91.0° |
| 2033-05-01 Sun | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.3° 07:40 | 6.35 | 11% | 99.3° |
| 2033-05-02 Mon | 82 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.3° 07:35 | 6.29 | 18% | 106.9° |
| 2033-05-03 Tue | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.3° 07:30 | 6.23 | 27% | 113.6° |
| 2033-05-04 Wed | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.3° 07:30 | 6.17 | 37% | 119.1° |
| 2033-05-05 Thu | 85 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.3° 07:25 | 6.12 | 46% | 123.2° |
| 2033-05-06 Fri | 84 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:20 | 6.06 | 56% | 125.6° |
| 2033-05-07 Sat | 85 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:15 | 6.0 | 66% | 126.2° |
| 2033-05-08 Sun | 85 | — | unknown | 01:05–04:20 (good, 3.25 h) | 87.3° 07:10 | 5.95 | 74% | 125.1° |
| 2033-05-09 Mon | 84 | — | unknown | 01:05–04:15 (good, 3.17 h) | 87.3° 07:10 | 5.89 | 82% | 122.3° |
| 2033-05-10 Tue | 76 | — | unknown | 01:05–04:15 (good, 3.17 h) | 87.3° 07:05 | 5.83 | 89% | 118.0° |
| 2033-05-11 Wed | 72 | — | unknown | 01:05–04:15 (good, 3.17 h) | 87.3° 07:00 | 5.78 | 94% | 112.7° |
| 2033-05-12 Thu | 65 | — | unknown | 01:05–04:10 (good, 3.08 h) | 87.3° 06:55 | 5.72 | 98% | 106.4° |
| 2033-05-13 Fri | 60 | — | unknown | 01:10–04:10 (good, 3.0 h) | 87.3° 06:50 | 5.67 | 100% | 99.6° |
| 2033-05-14 Sat | 54 | — | unknown | 01:25–04:10 (good, 2.75 h) | 87.3° 06:50 | 5.62 | 100% | 92.3° |
| 2033-05-15 Sun | 49 | — | unknown | 01:50–04:05 (good, 2.25 h) | 87.3° 06:45 | 5.56 | 98% | 84.8° |
| 2033-05-16 Mon | 47 | — | unknown | 02:05–04:05 (good, 2.0 h) | 87.3° 06:40 | 5.51 | 94% | 77.4° |
| 2033-05-17 Tue | 47 | — | unknown | 01:50–04:05 (good, 2.25 h) | 87.3° 06:35 | 5.46 | 87% | 70.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2033-04-18&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.