← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-03-08 Thu | 83 | — | unknown | 01:55–05:10 (good, 3.25 h) | 87.1° 07:50 | 9.29 | 22% | 65.7° |
| 2040-03-09 Fri | 87 | — | unknown | 01:50–05:10 (good, 3.33 h) | 87.1° 07:45 | 9.24 | 13% | 68.4° |
| 2040-03-10 Sat | 89 | — | unknown | 01:45–05:10 (good, 3.42 h) | 87.1° 07:40 | 9.19 | 6% | 72.5° |
| 2040-03-11 Sun | 89 | — | unknown | 01:45–05:05 (good, 3.33 h) | 87.1° 07:35 | 9.15 | 2% | 77.5° |
| 2040-03-12 Mon | 91 | — | unknown | 01:40–05:05 (good, 3.42 h) | 87.1° 07:35 | 9.1 | 0% | 83.2° |
| 2040-03-13 Tue | 91 | — | unknown | 01:35–05:05 (good, 3.5 h) | 87.1° 07:30 | 9.05 | 1% | 89.1° |
| 2040-03-14 Wed | 92 | — | unknown | 01:30–05:00 (good, 3.5 h) | 87.1° 07:25 | 9.0 | 4% | 94.8° |
| 2040-03-15 Thu | 94 | — | unknown | 01:25–05:00 (good, 3.58 h) | 87.1° 07:20 | 8.95 | 10% | 100.2° |
| 2040-03-16 Fri | 95 | — | unknown | 01:25–05:00 (good, 3.58 h) | 87.1° 07:20 | 8.9 | 16% | 105.1° |
| 2040-03-17 Sat | 94 | — | unknown | 01:20–04:55 (good, 3.58 h) | 87.1° 07:15 | 8.84 | 24% | 109.1° |
| 2040-03-18 Sun | 96 | — | unknown | 01:15–04:55 (good, 3.67 h) | 87.1° 07:10 | 8.79 | 33% | 112.2° |
| 2040-03-19 Mon | 97 | — | unknown | 01:15–04:55 (good, 3.67 h) | 87.1° 07:05 | 8.74 | 42% | 114.3° |
| 2040-03-20 Tue | 96 | — | unknown | 01:15–04:50 (good, 3.58 h) | 87.1° 07:00 | 8.69 | 52% | 115.3° |
| 2040-03-21 Wed | 96 | — | unknown | 01:10–04:50 (good, 3.67 h) | 87.1° 07:00 | 8.64 | 61% | 115.1° |
| 2040-03-22 Thu | 92 | — | unknown | 01:10–04:45 (good, 3.58 h) | 87.1° 06:55 | 8.59 | 70% | 113.8° |
| 2040-03-23 Fri | 90 | — | unknown | 01:10–04:45 (good, 3.58 h) | 87.1° 06:50 | 8.53 | 78% | 111.4° |
| 2040-03-24 Sat | 77 | — | unknown | 01:10–05:45 (good, 3.58 h) | 87.1° 07:45 | 8.48 | 86% | 108.0° |
| 2040-03-25 Sun | 71 | — | unknown | 02:15–05:40 (good, 3.42 h) | 87.1° 07:40 | 8.43 | 92% | 103.7° |
| 2040-03-26 Mon | 65 | — | unknown | 02:25–05:40 (good, 3.25 h) | 87.1° 07:40 | 8.37 | 97% | 98.8° |
| 2040-03-27 Tue | 58 | — | unknown | 02:55–05:40 (good, 2.75 h) | 87.1° 07:35 | 8.32 | 99% | 93.4° |
| 2040-03-28 Wed | 53 | — | unknown | 03:20–05:35 (good, 2.25 h) | 87.1° 07:30 | 8.27 | 100% | 87.7° |
| 2040-03-29 Thu | 50 | — | unknown | 03:35–05:35 (good, 2.0 h) | 87.1° 07:25 | 8.21 | 98% | 82.1° |
| 2040-03-30 Fri | 48 | — | unknown | 03:35–05:30 (good, 1.92 h) | 87.1° 07:25 | 8.16 | 94% | 76.7° |
| 2040-03-31 Sat | 50 | — | unknown | 03:05–05:30 (good, 2.42 h) | 87.1° 07:20 | 8.1 | 87% | 71.9° |
| 2040-04-01 Sun | 55 | — | unknown | 01:50–05:30 (good, 3.67 h) | 87.1° 07:15 | 8.05 | 79% | 68.1° |
| 2040-04-02 Mon | 67 | — | unknown | 01:15–05:25 (good, 4.17 h) | 87.1° 07:10 | 7.99 | 68% | 65.7° |
| 2040-04-03 Tue | 85 | — | unknown | 01:15–05:25 (good, 4.17 h) | 87.1° 07:05 | 7.94 | 57% | 64.8° |
| 2040-04-04 Wed | 95 | — | unknown | 01:10–05:20 (good, 4.17 h) | 87.1° 07:05 | 7.88 | 46% | 65.5° |
| 2040-04-05 Thu | 100 | — | unknown | 01:05–05:20 (good, 4.25 h) | 87.1° 07:00 | 7.83 | 35% | 67.8° |
| 2040-04-06 Fri | 100 | — | unknown | 01:00–05:20 (good, 4.33 h) | 87.1° 06:55 | 7.77 | 24% | 71.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-03-08&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.