← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-06-06 Sat | 87 | 71 | 62 | 23:35–01:00 (good, 1.42 h) | 71.1° 04:20 | 4.63 | 65% | 46.2° |
| 2026-06-07 Sun | 94 | 95 | 89 | 23:30–03:40 (good, 4.17 h) | 71.1° 04:15 | 4.61 | 55% | 50.8° |
| 2026-06-08 Mon | 97 | 0 | 0 | — | 71.1° 04:15 | 4.58 | 45% | 57.3° |
| 2026-06-09 Tue | 100 | 98 | 98 | 23:10–03:40 (good, 4.5 h) | 71.1° 04:10 | 4.56 | 34% | 65.5° |
| 2026-06-10 Wed | 100 | 96 | 96 | 23:15–03:40 (good, 4.42 h) | 71.1° 04:05 | 4.53 | 24% | 74.8° |
| 2026-06-11 Thu | 100 | 48 | 48 | 23:20–02:00 (good, 2.67 h) | 71.1° 04:00 | 4.51 | 15% | 84.9° |
| 2026-06-12 Fri | 100 | 0 | 0 | — | 71.1° 03:55 | 4.49 | 7% | 95.5° |
| 2026-06-13 Sat | 100 | 94 | 94 | 23:10–03:40 (good, 4.5 h) | 71.1° 03:55 | 4.48 | 2% | 106.1° |
| 2026-06-14 Sun | 100 | 91 | 91 | 23:10–03:40 (good, 4.5 h) | 71.1° 03:50 | 4.46 | 0% | 116.2° |
| 2026-06-15 Mon | 100 | 64 | 64 | 02:00–03:40 (good, 1.67 h) | 71.1° 03:45 | 4.45 | 1% | 125.2° |
| 2026-06-16 Tue | 100 | 0 | 0 | — | 71.1° 03:40 | 4.44 | 5% | 131.9° |
| 2026-06-17 Wed | 100 | 35 | 35 | 03:00–03:40 (good, 0.67 h) | 71.1° 03:40 | 4.43 | 12% | 135.6° |
| 2026-06-18 Thu | 100 | 74 | 74 | 23:10–03:40 (good, 4.5 h) | 71.1° 03:35 | 4.43 | 20% | 135.5° |
| 2026-06-19 Fri | 100 | 93 | 93 | 23:10–03:40 (good, 4.5 h) | 71.1° 03:30 | 4.42 | 30% | 132.1° |
| 2026-06-20 Sat | 100 | 98 | 98 | 23:15–03:40 (good, 4.42 h) | 71.1° 03:25 | 4.42 | 40% | 126.3° |
| 2026-06-21 Sun | 100 | 99 | 99 | 23:15–03:40 (good, 4.42 h) | 71.1° 03:20 | 4.42 | 50% | 119.0° |
| 2026-06-22 Mon | 100 | 89 | 89 | 23:15–03:40 (good, 4.42 h) | 71.1° 03:20 | 4.42 | 60% | 110.9° |
| 2026-06-23 Tue | 100 | 60 | 60 | 01:00–03:40 (good, 2.67 h) | 71.1° 03:15 | 4.43 | 70% | 102.4° |
| 2026-06-24 Wed | 100 | 87 | 87 | 23:15–03:40 (good, 4.42 h) | 71.1° 03:10 | 4.43 | 78% | 93.7° |
| 2026-06-25 Thu | 100 | 89 | 89 | 23:35–03:40 (good, 4.08 h) | 71.1° 03:05 | 4.44 | 86% | 85.1° |
| 2026-06-26 Fri | 100 | 96 | 96 | 00:15–03:40 (good, 3.42 h) | 71.1° 03:00 | 4.45 | 92% | 76.7° |
| 2026-06-27 Sat | 69 | 66 | 45 | 00:30–02:00 (good, 1.5 h) | 71.1° 03:00 | 4.47 | 96% | 68.6° |
| 2026-06-28 Sun | 58 | 100 | 58 | 00:40–03:40 (good, 3.0 h) | 71.1° 02:55 | 4.48 | 99% | 61.0° |
| 2026-06-29 Mon | 49 | 89 | 44 | 23:10–03:40 (marginal, 4.5 h) | 71.1° 02:50 | 4.5 | 100% | 54.3° |
| 2026-06-30 Tue | 43 | 96 | 41 | 23:10–03:45 (marginal, 4.58 h) | 71.1° 02:45 | 4.52 | 99% | 48.8° |
| 2026-07-01 Wed | 43 | 27 | 11 | 23:10–00:00 (marginal, 0.83 h) | 71.1° 02:45 | 4.54 | 96% | 45.2° |
| 2026-07-02 Thu | 47 | 74 | 35 | 23:10–03:45 (marginal, 4.58 h) | 71.1° 02:40 | 4.56 | 92% | 43.9° |
| 2026-07-03 Fri | 78 | 31 | 24 | 02:00–03:00 (marginal, 1.0 h) | 71.1° 02:35 | 4.58 | 86% | 45.3° |
| 2026-07-04 Sat | 89 | 72 | 64 | 01:00–01:15 (good, 0.25 h) | 71.1° 02:30 | 4.61 | 78% | 49.3° |
| 2026-07-05 Sun | 96 | 89 | 86 | 23:10–03:00 (good, 3.83 h) | 71.1° 02:25 | 4.64 | 70% | 55.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-06-06&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.