← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-06-19 Mon | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.1° 09:00 | 4.42 | 10% | 24.6° |
| 2028-06-20 Tue | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 08:55 | 4.42 | 4% | 36.1° |
| 2028-06-21 Wed | 14 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.1° 08:55 | 4.42 | 1% | 48.8° |
| 2028-06-22 Thu | 15 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.1° 08:50 | 4.43 | 0% | 62.0° |
| 2028-06-23 Fri | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.1° 08:45 | 4.43 | 2% | 75.7° |
| 2028-06-24 Sat | 19 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.1° 08:40 | 4.44 | 6% | 89.7° |
| 2028-06-25 Sun | 21 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.1° 08:35 | 4.45 | 13% | 103.7° |
| 2028-06-26 Mon | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.1° 08:35 | 4.46 | 22% | 117.7° |
| 2028-06-27 Tue | 24 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.1° 08:30 | 4.47 | 32% | 131.4° |
| 2028-06-28 Wed | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.1° 08:25 | 4.49 | 43% | 144.6° |
| 2028-06-29 Thu | 28 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:20 | 4.51 | 55% | 156.7° |
| 2028-06-30 Fri | 29 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:15 | 4.53 | 66% | 165.1° |
| 2028-07-01 Sat | 31 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.1° 08:15 | 4.55 | 76% | 163.3° |
| 2028-07-02 Sun | 31 | — | unknown | 02:40–03:45 (good, 1.08 h) | 79.1° 08:10 | 4.57 | 85% | 153.6° |
| 2028-07-03 Mon | 32 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.1° 08:05 | 4.6 | 92% | 141.9° |
| 2028-07-04 Tue | 30 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.1° 08:00 | 4.62 | 96% | 129.6° |
| 2028-07-05 Wed | 30 | — | unknown | 02:40–03:50 (good, 1.17 h) | 79.1° 08:00 | 4.65 | 99% | 117.3° |
| 2028-07-06 Thu | 26 | — | unknown | 02:45–03:50 (good, 1.08 h) | 79.1° 07:55 | 4.68 | 100% | 105.1° |
| 2028-07-07 Fri | 23 | — | unknown | 02:55–03:50 (good, 0.92 h) | 79.1° 07:50 | 4.71 | 99% | 93.0° |
| 2028-07-08 Sat | 20 | — | unknown | 01:55–04:40 (marginal, 2.75 h) | 79.1° 07:45 | 4.75 | 95% | 81.2° |
| 2028-07-09 Sun | 18 | — | unknown | 01:55–03:55 (marginal, 2.0 h) | 79.1° 07:40 | 4.78 | 90% | 69.5° |
| 2028-07-10 Mon | 16 | — | unknown | 01:55–03:55 (marginal, 2.0 h) | 79.1° 07:40 | 4.82 | 84% | 58.0° |
| 2028-07-11 Tue | 16 | — | unknown | 01:50–03:55 (marginal, 2.08 h) | 79.1° 07:35 | 4.86 | 77% | 46.7° |
| 2028-07-12 Wed | 17 | — | unknown | 01:45–03:55 (marginal, 2.17 h) | 79.1° 07:30 | 4.9 | 68% | 35.8° |
| 2028-07-13 Thu | 20 | — | unknown | 01:35–04:00 (marginal, 2.42 h) | 79.1° 07:25 | 4.94 | 59% | 25.4° |
| 2028-07-14 Fri | 27 | — | unknown | 03:05–04:00 (good, 0.92 h) | 79.1° 07:20 | 4.98 | 49% | 16.9° |
| 2028-07-15 Sat | 34 | — | unknown | 02:10–04:00 (good, 1.83 h) | 79.1° 07:20 | 5.02 | 40% | 14.5° |
| 2028-07-16 Sun | 41 | — | unknown | 02:00–04:00 (good, 2.0 h) | 79.1° 07:15 | 5.06 | 30% | 20.9° |
| 2028-07-17 Mon | 51 | — | unknown | 01:45–04:05 (good, 2.33 h) | 79.1° 07:10 | 5.11 | 21% | 31.4° |
| 2028-07-18 Tue | 60 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:05 | 5.15 | 13% | 43.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-06-19&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.