← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-06-18 Tue | 5 | — | unknown | 03:15–03:40 (marginal, 0.42 h) | 79.1° 09:05 | 4.43 | 86% | 81.3° |
| 2030-06-19 Wed | 5 | — | unknown | 03:10–03:40 (marginal, 0.5 h) | 79.1° 09:05 | 4.42 | 78% | 68.0° |
| 2030-06-20 Thu | 5 | — | unknown | 03:10–03:40 (marginal, 0.5 h) | 79.1° 09:00 | 4.42 | 68% | 55.2° |
| 2030-06-21 Fri | 6 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.1° 08:55 | 4.42 | 58% | 43.2° |
| 2030-06-22 Sat | 8 | — | unknown | 02:55–03:40 (marginal, 0.75 h) | 79.1° 08:50 | 4.42 | 48% | 31.9° |
| 2030-06-23 Sun | 10 | — | unknown | 02:50–04:30 (marginal, 1.67 h) | 79.1° 08:45 | 4.43 | 38% | 22.2° |
| 2030-06-24 Mon | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 08:45 | 4.44 | 29% | 16.2° |
| 2030-06-25 Tue | 16 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.1° 08:40 | 4.44 | 21% | 17.6° |
| 2030-06-26 Wed | 20 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.1° 08:35 | 4.46 | 14% | 25.2° |
| 2030-06-27 Thu | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.1° 08:30 | 4.47 | 8% | 35.1° |
| 2030-06-28 Fri | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.1° 08:25 | 4.48 | 4% | 45.8° |
| 2030-06-29 Sat | 26 | — | unknown | 02:55–03:40 (good, 0.75 h) | 79.1° 08:25 | 4.5 | 1% | 57.0° |
| 2030-06-30 Sun | 28 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:20 | 4.52 | 0% | 68.5° |
| 2030-07-01 Mon | 30 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:15 | 4.54 | 1% | 80.2° |
| 2030-07-02 Tue | 31 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.1° 08:10 | 4.56 | 4% | 92.0° |
| 2030-07-03 Wed | 33 | — | unknown | 02:40–03:45 (good, 1.08 h) | 79.1° 08:10 | 4.58 | 9% | 104.1° |
| 2030-07-04 Thu | 34 | — | unknown | 02:35–03:45 (good, 1.17 h) | 79.1° 08:05 | 4.61 | 16% | 116.3° |
| 2030-07-05 Fri | 37 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.1° 08:00 | 4.64 | 24% | 128.5° |
| 2030-07-06 Sat | 39 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.1° 07:55 | 4.67 | 34% | 140.7° |
| 2030-07-07 Sun | 40 | — | unknown | 02:25–03:50 (good, 1.42 h) | 79.1° 07:50 | 4.7 | 44% | 152.4° |
| 2030-07-08 Mon | 42 | — | unknown | 02:20–03:50 (good, 1.5 h) | 79.1° 07:50 | 4.73 | 55% | 161.8° |
| 2030-07-09 Tue | 43 | — | unknown | 02:15–03:50 (good, 1.58 h) | 79.1° 07:45 | 4.77 | 66% | 163.5° |
| 2030-07-10 Wed | 46 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.1° 07:40 | 4.8 | 77% | 155.2° |
| 2030-07-11 Thu | 47 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.1° 07:35 | 4.84 | 86% | 142.9° |
| 2030-07-12 Fri | 43 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.1° 07:30 | 4.88 | 93% | 129.3° |
| 2030-07-13 Sat | 41 | — | unknown | 02:15–03:55 (good, 1.67 h) | 79.1° 07:30 | 4.92 | 98% | 115.3° |
| 2030-07-14 Sun | 35 | — | unknown | 02:20–04:00 (good, 1.67 h) | 79.1° 07:25 | 4.96 | 100% | 101.1° |
| 2030-07-15 Mon | 29 | — | unknown | 03:05–04:00 (good, 0.92 h) | 79.1° 07:20 | 5.0 | 99% | 87.1° |
| 2030-07-16 Tue | 23 | — | unknown | 01:30–04:00 (marginal, 2.5 h) | 79.1° 07:15 | 5.04 | 95% | 73.4° |
| 2030-07-17 Wed | 20 | — | unknown | 01:30–04:05 (marginal, 2.58 h) | 79.1° 07:15 | 5.09 | 89% | 60.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-06-18&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.