← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-05-08 Thu | 48 | — | unknown | 01:45–04:20 (good, 2.58 h) | 87.3° 07:15 | 5.97 | 96% | 87.3° |
| 2031-05-09 Fri | 45 | — | unknown | 01:50–04:15 (good, 2.42 h) | 87.3° 07:10 | 5.92 | 89% | 78.4° |
| 2031-05-10 Sat | 46 | — | unknown | 01:25–04:15 (good, 2.83 h) | 87.3° 07:05 | 5.86 | 81% | 70.0° |
| 2031-05-11 Sun | 51 | — | unknown | 01:15–04:15 (good, 3.0 h) | 87.3° 07:00 | 5.81 | 71% | 62.7° |
| 2031-05-12 Mon | 64 | — | unknown | 00:45–04:10 (good, 3.42 h) | 87.3° 07:00 | 5.75 | 60% | 57.0° |
| 2031-05-13 Tue | 73 | — | unknown | 00:40–04:10 (good, 3.5 h) | 87.3° 06:55 | 5.7 | 48% | 53.4° |
| 2031-05-14 Wed | 81 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.3° 06:50 | 5.64 | 38% | 52.2° |
| 2031-05-15 Thu | 88 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.3° 06:45 | 5.59 | 27% | 53.5° |
| 2031-05-16 Fri | 94 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.3° 06:40 | 5.54 | 18% | 56.9° |
| 2031-05-17 Sat | 99 | — | unknown | 00:25–04:05 (good, 3.67 h) | 87.3° 06:40 | 5.48 | 11% | 61.9° |
| 2031-05-18 Sun | 100 | — | unknown | 00:20–04:05 (good, 3.75 h) | 87.3° 06:35 | 5.43 | 6% | 68.1° |
| 2031-05-19 Mon | 100 | — | unknown | 00:15–04:00 (good, 3.75 h) | 87.3° 06:30 | 5.38 | 2% | 75.1° |
| 2031-05-20 Tue | 100 | — | unknown | 00:10–04:00 (good, 3.83 h) | 87.3° 06:25 | 5.33 | 0% | 82.4° |
| 2031-05-21 Wed | 100 | — | unknown | 00:10–04:00 (good, 3.83 h) | 87.3° 06:25 | 5.28 | 0% | 89.8° |
| 2031-05-22 Thu | 100 | — | unknown | 00:05–03:55 (good, 3.83 h) | 87.3° 06:20 | 5.23 | 2% | 97.1° |
| 2031-05-23 Fri | 100 | — | unknown | 00:00–03:55 (good, 3.92 h) | 87.3° 06:15 | 5.18 | 6% | 104.2° |
| 2031-05-24 Sat | 100 | — | unknown | 23:55–03:55 (good, 4.0 h) | 87.3° 06:10 | 5.14 | 12% | 110.8° |
| 2031-05-25 Sun | 100 | — | unknown | 23:50–03:55 (good, 4.08 h) | 87.3° 06:05 | 5.09 | 18% | 116.7° |
| 2031-05-26 Mon | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 87.3° 06:05 | 5.05 | 26% | 121.7° |
| 2031-05-27 Tue | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 87.3° 06:00 | 5.0 | 35% | 125.4° |
| 2031-05-28 Wed | 100 | — | unknown | 23:45–03:50 (good, 4.08 h) | 87.3° 05:55 | 4.96 | 45% | 127.5° |
| 2031-05-29 Thu | 100 | — | unknown | 23:45–03:50 (good, 4.08 h) | 87.3° 05:50 | 4.92 | 55% | 127.6° |
| 2031-05-30 Fri | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 87.3° 05:45 | 4.88 | 65% | 125.6° |
| 2031-05-31 Sat | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 87.3° 05:45 | 4.84 | 74% | 121.6° |
| 2031-06-01 Sun | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 87.3° 05:40 | 4.8 | 83% | 115.7° |
| 2031-06-02 Mon | 89 | — | unknown | 23:40–03:45 (good, 4.08 h) | 87.3° 05:35 | 4.77 | 91% | 108.4° |
| 2031-06-03 Tue | 80 | — | unknown | 23:45–03:45 (good, 4.0 h) | 87.3° 05:30 | 4.73 | 96% | 100.1° |
| 2031-06-04 Wed | 69 | — | unknown | 00:00–03:45 (good, 3.75 h) | 87.3° 05:30 | 4.7 | 100% | 91.1° |
| 2031-06-05 Thu | 59 | — | unknown | 00:40–03:40 (good, 3.0 h) | 87.3° 05:25 | 4.67 | 100% | 82.0° |
| 2031-06-06 Fri | 53 | — | unknown | 01:10–03:40 (good, 2.5 h) | 87.3° 05:20 | 4.64 | 97% | 73.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-05-08&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.