← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-06-23 Mon | 0 | 0 | 0 | — | 72.5° 11:00 | 4.43 | 3% | 12.2° |
| 2025-06-24 Tue | 0 | 0 | 0 | — | 72.5° 10:55 | 4.44 | 1% | 26.9° |
| 2025-06-25 Wed | 0 | 0 | 0 | — | 72.5° 10:50 | 4.45 | 0% | 41.4° |
| 2025-06-26 Thu | 0 | 0 | 0 | — | 72.5° 10:45 | 4.46 | 3% | 55.6° |
| 2025-06-27 Fri | 0 | 0 | 0 | — | 72.5° 10:40 | 4.47 | 8% | 69.4° |
| 2025-06-28 Sat | 0 | 0 | 0 | — | 72.5° 10:40 | 4.48 | 15% | 82.8° |
| 2025-06-29 Sun | 0 | 100 | 0 | — | 72.5° 10:35 | 4.5 | 23% | 95.8° |
| 2025-06-30 Mon | 0 | 89 | 0 | — | 72.5° 10:30 | 4.52 | 32% | 108.5° |
| 2025-07-01 Tue | 0 | 100 | 0 | — | 72.5° 10:25 | 4.54 | 42% | 120.8° |
| 2025-07-02 Wed | 0 | 100 | 0 | — | 72.5° 10:25 | 4.56 | 51% | 132.9° |
| 2025-07-03 Thu | 0 | 100 | 0 | — | 72.5° 10:20 | 4.59 | 61% | 144.8° |
| 2025-07-04 Fri | 0 | 100 | 0 | — | 72.5° 10:15 | 4.62 | 70% | 156.6° |
| 2025-07-05 Sat | 0 | 100 | 0 | — | 72.5° 10:10 | 4.64 | 78% | 168.5° |
| 2025-07-06 Sun | 0 | 100 | 0 | — | 72.5° 10:05 | 4.67 | 85% | 179.3° |
| 2025-07-07 Mon | 1 | 100 | 1 | — | 72.5° 10:05 | 4.7 | 91% | 167.5° |
| 2025-07-08 Tue | 1 | 99 | 1 | — | 72.5° 10:00 | 4.74 | 96% | 155.3° |
| 2025-07-09 Wed | 1 | 100 | 1 | — | 72.5° 09:55 | 4.77 | 99% | 142.8° |
| 2025-07-10 Thu | 1 | 69 | 1 | — | 72.5° 09:50 | 4.81 | 100% | 130.1° |
| 2025-07-11 Fri | 1 | 77 | 1 | — | 72.5° 09:45 | 4.85 | 99% | 117.2° |
| 2025-07-12 Sat | 1 | 100 | 1 | — | 72.5° 09:45 | 4.88 | 95% | 104.0° |
| 2025-07-13 Sun | 1 | 100 | 1 | — | 72.5° 09:40 | 4.92 | 90% | 90.6° |
| 2025-07-14 Mon | 1 | 100 | 1 | — | 72.5° 09:35 | 4.97 | 82% | 77.1° |
| 2025-07-15 Tue | 1 | 94 | 1 | — | 72.5° 09:30 | 5.01 | 73% | 63.3° |
| 2025-07-16 Wed | 2 | 98 | 2 | — | 72.5° 09:30 | 5.05 | 62% | 49.4° |
| 2025-07-17 Thu | 2 | 9 | 0 | — | 72.5° 09:25 | 5.1 | 51% | 35.3° |
| 2025-07-18 Fri | 4 | 66 | 3 | 03:50–04:00 (marginal, 0.17 h) | 72.5° 09:20 | 5.14 | 40% | 21.1° |
| 2025-07-19 Sat | 5 | 100 | 5 | 04:25–04:55 (marginal, 0.5 h) | 72.5° 09:15 | 5.19 | 29% | 6.9° |
| 2025-07-20 Sun | 7 | 100 | 7 | 04:15–04:55 (marginal, 0.67 h) | 72.5° 09:10 | 5.24 | 19% | 7.5° |
| 2025-07-21 Mon | 10 | 100 | 10 | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.28 | 11% | 21.8° |
| 2025-07-22 Tue | 12 | 99 | 12 | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.33 | 5% | 36.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-06-23&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.