← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-06-08 Sun | 1 | — | unknown | — | 79.1° 09:45 | 4.59 | 83% | 85.7° |
| 2031-06-09 Mon | 1 | — | unknown | — | 79.1° 09:45 | 4.56 | 74% | 71.8° |
| 2031-06-10 Tue | 1 | — | unknown | — | 79.1° 09:40 | 4.54 | 63% | 58.5° |
| 2031-06-11 Wed | 2 | — | unknown | — | 79.1° 09:35 | 4.52 | 52% | 45.7° |
| 2031-06-12 Thu | 2 | — | unknown | 03:35–03:40 (marginal, 0.08 h) | 79.1° 09:30 | 4.5 | 41% | 33.9° |
| 2031-06-13 Fri | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:25 | 4.48 | 31% | 23.7° |
| 2031-06-14 Sat | 5 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:25 | 4.47 | 22% | 17.5° |
| 2031-06-15 Sun | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.1° 09:20 | 4.46 | 14% | 19.0° |
| 2031-06-16 Mon | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:15 | 4.44 | 8% | 26.7° |
| 2031-06-17 Tue | 8 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.1° 09:10 | 4.44 | 4% | 36.7° |
| 2031-06-18 Wed | 9 | — | unknown | 03:10–04:30 (marginal, 1.33 h) | 79.1° 09:10 | 4.43 | 1% | 47.4° |
| 2031-06-19 Thu | 10 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.1° 09:05 | 4.43 | 0% | 58.5° |
| 2031-06-20 Fri | 12 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 09:00 | 4.42 | 1% | 69.7° |
| 2031-06-21 Sat | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 08:55 | 4.42 | 4% | 80.9° |
| 2031-06-22 Sun | 15 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.1° 08:50 | 4.42 | 8% | 92.2° |
| 2031-06-23 Mon | 16 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.1° 08:50 | 4.43 | 14% | 103.6° |
| 2031-06-24 Tue | 17 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.1° 08:45 | 4.43 | 21% | 115.0° |
| 2031-06-25 Wed | 19 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.1° 08:40 | 4.44 | 30% | 126.3° |
| 2031-06-26 Thu | 22 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.1° 08:35 | 4.45 | 39% | 137.7° |
| 2031-06-27 Fri | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.1° 08:30 | 4.46 | 49% | 148.6° |
| 2031-06-28 Sat | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.1° 08:30 | 4.48 | 60% | 158.2° |
| 2031-06-29 Sun | 25 | — | unknown | 02:55–03:40 (good, 0.75 h) | 79.1° 08:25 | 4.5 | 70% | 162.8° |
| 2031-06-30 Mon | 28 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:20 | 4.51 | 80% | 158.2° |
| 2031-07-01 Tue | 28 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:15 | 4.53 | 88% | 147.4° |
| 2031-07-02 Wed | 26 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:15 | 4.56 | 95% | 134.4° |
| 2031-07-03 Thu | 26 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:10 | 4.58 | 99% | 120.5° |
| 2031-07-04 Fri | 23 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:05 | 4.6 | 100% | 106.0° |
| 2031-07-05 Sat | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 79.1° 08:00 | 4.63 | 98% | 91.5° |
| 2031-07-06 Sun | 16 | — | unknown | 02:10–03:50 (marginal, 1.67 h) | 79.1° 07:55 | 4.66 | 93% | 77.1° |
| 2031-07-07 Mon | 15 | — | unknown | 02:10–03:50 (marginal, 1.67 h) | 79.1° 07:55 | 4.69 | 86% | 63.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-06-08&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.