← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-05-19 Tue | 100 | 0 | 0 | — | 87.1° 04:10 | 5.37 | 14% | 114.3° |
| 2026-05-20 Wed | 100 | 74 | 74 | 22:40–04:00 (good, 5.33 h) | 87.1° 04:05 | 5.32 | 23% | 114.6° |
| 2026-05-21 Thu | 100 | 13 | 13 | 22:40–00:00 (marginal, 1.33 h) | 87.1° 04:00 | 5.27 | 33% | 113.2° |
| 2026-05-22 Fri | 100 | 6 | 6 | — | 87.1° 03:55 | 5.22 | 44% | 110.5° |
| 2026-05-23 Sat | 100 | 46 | 46 | 01:00–02:00 (good, 1.0 h) | 87.1° 03:50 | 5.17 | 55% | 106.8° |
| 2026-05-24 Sun | 100 | 81 | 81 | 01:00–03:55 (good, 2.92 h) | 87.1° 03:50 | 5.13 | 65% | 102.4° |
| 2026-05-25 Mon | 100 | 40 | 40 | 01:00–03:00 (marginal, 2.0 h) | 87.1° 03:45 | 5.08 | 74% | 97.5° |
| 2026-05-26 Tue | 100 | 80 | 80 | 00:00–03:00 (good, 3.0 h) | 87.1° 03:40 | 5.04 | 83% | 92.4° |
| 2026-05-27 Wed | 100 | 78 | 78 | 23:05–01:00 (good, 1.92 h) | 87.1° 03:35 | 4.99 | 89% | 87.3° |
| 2026-05-28 Thu | 79 | 99 | 78 | 23:15–03:50 (good, 4.58 h) | 87.1° 03:35 | 4.95 | 94% | 82.4° |
| 2026-05-29 Fri | 75 | 91 | 68 | 01:00–03:50 (good, 2.83 h) | 87.1° 03:30 | 4.91 | 98% | 77.8° |
| 2026-05-30 Sat | 68 | 67 | 45 | 01:00–03:45 (marginal, 2.75 h) | 87.1° 03:25 | 4.87 | 100% | 73.6° |
| 2026-05-31 Sun | 65 | 95 | 61 | 00:00–03:45 (good, 3.75 h) | 87.1° 03:20 | 4.83 | 100% | 70.2° |
| 2026-06-01 Mon | 65 | 37 | 24 | 23:00–01:00 (marginal, 2.0 h) | 87.1° 03:15 | 4.79 | 98% | 67.5° |
| 2026-06-02 Tue | 90 | 88 | 79 | 23:00–01:00 (good, 2.0 h) | 87.1° 03:15 | 4.76 | 94% | 65.8° |
| 2026-06-03 Wed | 95 | 75 | 71 | 23:00–01:00 (good, 2.0 h) | 87.1° 03:10 | 4.73 | 89% | 65.2° |
| 2026-06-04 Thu | 99 | 45 | 44 | 23:00–01:00 (good, 2.0 h) | 87.1° 03:05 | 4.69 | 82% | 65.8° |
| 2026-06-05 Fri | 100 | 78 | 78 | 02:00–03:40 (good, 1.67 h) | 87.1° 03:00 | 4.66 | 74% | 67.5° |
| 2026-06-06 Sat | 100 | 74 | 74 | 23:05–01:15 (good, 2.17 h) | 87.1° 02:55 | 4.63 | 65% | 70.2° |
| 2026-06-07 Sun | 100 | 94 | 94 | 23:05–03:40 (good, 4.58 h) | 87.1° 02:55 | 4.61 | 55% | 74.0° |
| 2026-06-08 Mon | 100 | 0 | 0 | — | 87.1° 02:50 | 4.58 | 45% | 78.6° |
| 2026-06-09 Tue | 100 | 98 | 98 | 23:05–03:40 (good, 4.58 h) | 87.1° 02:45 | 4.56 | 34% | 83.9° |
| 2026-06-10 Wed | 100 | 95 | 95 | 23:05–03:40 (good, 4.58 h) | 87.1° 02:40 | 4.53 | 24% | 89.6° |
| 2026-06-11 Thu | 100 | 50 | 50 | 23:10–02:00 (good, 2.83 h) | 87.1° 02:40 | 4.51 | 15% | 95.6° |
| 2026-06-12 Fri | 100 | 0 | 0 | — | 87.1° 02:35 | 4.49 | 7% | 101.4° |
| 2026-06-13 Sat | 100 | 94 | 94 | 23:10–03:40 (good, 4.5 h) | 87.1° 02:30 | 4.48 | 2% | 106.7° |
| 2026-06-14 Sun | 100 | 92 | 92 | 23:10–03:40 (good, 4.5 h) | 87.1° 02:25 | 4.46 | 0% | 110.9° |
| 2026-06-15 Mon | 100 | 65 | 65 | 02:00–03:40 (good, 1.67 h) | 87.1° 02:20 | 4.45 | 1% | 113.7° |
| 2026-06-16 Tue | 100 | 0 | 0 | — | 87.1° 02:20 | 4.44 | 5% | 114.8° |
| 2026-06-17 Wed | 100 | 32 | 32 | 03:00–03:40 (good, 0.67 h) | 87.1° 02:15 | 4.43 | 12% | 114.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-05-19&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.