← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-04-13 Wed | 44 | — | unknown | 02:55–05:05 (good, 2.17 h) | 87.3° 08:50 | 7.37 | 98% | 107.8° |
| 2044-04-14 Thu | 43 | — | unknown | 02:55–05:05 (good, 2.17 h) | 87.3° 08:45 | 7.31 | 94% | 101.9° |
| 2044-04-15 Fri | 42 | — | unknown | 02:50–05:00 (good, 2.17 h) | 87.2° 08:40 | 7.26 | 88% | 95.7° |
| 2044-04-16 Sat | 42 | — | unknown | 02:45–05:00 (good, 2.25 h) | 87.2° 08:40 | 7.2 | 81% | 89.4° |
| 2044-04-17 Sun | 43 | — | unknown | 02:40–04:55 (good, 2.25 h) | 87.2° 08:35 | 7.14 | 73% | 83.2° |
| 2044-04-18 Mon | 47 | — | unknown | 02:35–04:55 (good, 2.33 h) | 87.3° 08:30 | 7.08 | 65% | 77.2° |
| 2044-04-19 Tue | 54 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.3° 08:25 | 7.02 | 55% | 71.5° |
| 2044-04-20 Wed | 59 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.97 | 46% | 66.5° |
| 2044-04-21 Thu | 64 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.91 | 36% | 62.4° |
| 2044-04-22 Fri | 68 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.3° 08:15 | 6.85 | 27% | 59.4° |
| 2044-04-23 Sat | 72 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.3° 08:10 | 6.79 | 18% | 58.0° |
| 2044-04-24 Sun | 74 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.3° 08:05 | 6.73 | 11% | 58.5° |
| 2044-04-25 Mon | 75 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.67 | 5% | 60.9° |
| 2044-04-26 Tue | 76 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.62 | 1% | 65.2° |
| 2044-04-27 Wed | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.3° 07:55 | 6.56 | 0% | 71.1° |
| 2044-04-28 Thu | 78 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:50 | 6.5 | 2% | 78.1° |
| 2044-04-29 Fri | 80 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.44 | 6% | 85.8° |
| 2044-04-30 Sat | 80 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.38 | 14% | 93.6° |
| 2044-05-01 Sun | 81 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.33 | 23% | 101.2° |
| 2044-05-02 Mon | 82 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.3° 07:35 | 6.27 | 33% | 108.1° |
| 2044-05-03 Tue | 82 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.3° 07:30 | 6.21 | 44% | 114.0° |
| 2044-05-04 Wed | 82 | — | unknown | 01:20–04:25 (good, 3.08 h) | 87.2° 07:25 | 6.15 | 56% | 118.5° |
| 2044-05-05 Thu | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:25 | 6.1 | 66% | 121.2° |
| 2044-05-06 Fri | 82 | — | unknown | 01:15–04:20 (good, 3.08 h) | 87.3° 07:20 | 6.04 | 76% | 122.1° |
| 2044-05-07 Sat | 82 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:15 | 5.98 | 84% | 121.1° |
| 2044-05-08 Sun | 75 | — | unknown | 01:10–04:20 (good, 3.17 h) | 87.3° 07:10 | 5.93 | 91% | 118.4° |
| 2044-05-09 Mon | 71 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.2° 07:05 | 5.87 | 96% | 114.4° |
| 2044-05-10 Tue | 67 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.2° 07:05 | 5.81 | 99% | 109.4° |
| 2044-05-11 Wed | 63 | — | unknown | 01:10–04:15 (good, 3.08 h) | 87.3° 07:00 | 5.76 | 100% | 103.6° |
| 2044-05-12 Thu | 59 | — | unknown | 01:10–04:10 (good, 3.0 h) | 87.3° 06:55 | 5.7 | 99% | 97.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-04-13&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.