← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-05-03 Tue | 76 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:35 | 6.21 | 44% | 134.4° |
| 2044-05-04 Wed | 77 | — | unknown | 01:35–04:25 (good, 2.83 h) | 71.1° 06:30 | 6.15 | 56% | 134.0° |
| 2044-05-05 Thu | 78 | — | unknown | 01:30–04:25 (good, 2.92 h) | 71.1° 06:25 | 6.1 | 66% | 130.6° |
| 2044-05-06 Fri | 76 | — | unknown | 01:30–04:20 (good, 2.83 h) | 71.1° 06:20 | 6.04 | 76% | 124.9° |
| 2044-05-07 Sat | 76 | — | unknown | 01:25–04:20 (good, 2.92 h) | 71.1° 06:15 | 5.98 | 84% | 117.8° |
| 2044-05-08 Sun | 66 | — | unknown | 01:25–04:20 (good, 2.92 h) | 71.1° 06:15 | 5.93 | 91% | 109.8° |
| 2044-05-09 Mon | 59 | — | unknown | 01:30–04:15 (good, 2.75 h) | 71.1° 06:10 | 5.87 | 96% | 101.3° |
| 2044-05-10 Tue | 53 | — | unknown | 01:35–04:15 (good, 2.67 h) | 71.1° 06:05 | 5.81 | 99% | 92.6° |
| 2044-05-11 Wed | 47 | — | unknown | 02:05–04:15 (good, 2.17 h) | 71.1° 06:00 | 5.76 | 100% | 84.1° |
| 2044-05-12 Thu | 42 | — | unknown | 02:30–04:10 (good, 1.67 h) | 71.1° 06:00 | 5.7 | 99% | 75.7° |
| 2044-05-13 Fri | 40 | — | unknown | 02:50–04:10 (good, 1.33 h) | 71.1° 05:55 | 5.65 | 96% | 67.8° |
| 2044-05-14 Sat | 38 | — | unknown | 03:00–04:10 (good, 1.17 h) | 71.1° 05:50 | 5.6 | 92% | 60.5° |
| 2044-05-15 Sun | 39 | — | unknown | 02:45–04:05 (good, 1.33 h) | 71.1° 05:45 | 5.54 | 86% | 54.2° |
| 2044-05-16 Mon | 51 | — | unknown | 01:40–04:05 (good, 2.42 h) | 71.1° 05:40 | 5.49 | 79% | 49.2° |
| 2044-05-17 Tue | 61 | — | unknown | 00:35–04:05 (good, 3.5 h) | 71.1° 05:40 | 5.44 | 71% | 46.1° |
| 2044-05-18 Wed | 70 | — | unknown | 00:35–04:00 (good, 3.42 h) | 71.1° 05:35 | 5.39 | 62% | 45.2° |
| 2044-05-19 Thu | 78 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:30 | 5.34 | 52% | 46.9° |
| 2044-05-20 Fri | 85 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.29 | 42% | 51.0° |
| 2044-05-21 Sat | 91 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:20 | 5.24 | 32% | 57.1° |
| 2044-05-22 Sun | 97 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:20 | 5.19 | 23% | 64.8° |
| 2044-05-23 Mon | 100 | — | unknown | 00:15–03:55 (good, 3.67 h) | 71.1° 05:15 | 5.14 | 14% | 73.8° |
| 2044-05-24 Tue | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 71.1° 05:10 | 5.1 | 7% | 83.6° |
| 2044-05-25 Wed | 100 | — | unknown | 00:05–03:50 (good, 3.75 h) | 71.1° 05:05 | 5.05 | 2% | 93.9° |
| 2044-05-26 Thu | 100 | — | unknown | 00:00–03:50 (good, 3.83 h) | 71.1° 05:05 | 5.01 | 0% | 104.4° |
| 2044-05-27 Fri | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 05:00 | 4.97 | 1% | 114.3° |
| 2044-05-28 Sat | 100 | — | unknown | 23:55–03:50 (good, 3.92 h) | 71.1° 04:55 | 4.92 | 5% | 123.2° |
| 2044-05-29 Sun | 100 | — | unknown | 23:50–03:50 (good, 4.0 h) | 71.1° 04:50 | 4.88 | 11% | 130.1° |
| 2044-05-30 Mon | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.85 | 20% | 134.1° |
| 2044-05-31 Tue | 100 | — | unknown | 23:45–03:45 (good, 4.0 h) | 71.1° 04:45 | 4.81 | 30% | 134.7° |
| 2044-06-01 Wed | 100 | — | unknown | 23:40–03:45 (good, 4.08 h) | 71.1° 04:40 | 4.77 | 41% | 132.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-05-03&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.