← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-11-12 Wed | 100 | 79 | 79 | 20:00–03:55 (good, 7.92 h) | 79.1° 22:25 | 10.88 | 43% | 113.7° |
| 2025-11-13 Thu | 100 | 99 | 99 | 18:40–03:50 (good, 9.17 h) | 79.1° 22:25 | 10.91 | 33% | 125.8° |
| 2025-11-14 Fri | 100 | 100 | 100 | 18:40–03:50 (good, 9.17 h) | 79.1° 22:20 | 10.94 | 24% | 137.4° |
| 2025-11-15 Sat | 100 | 62 | 62 | 18:40–23:00 (good, 4.33 h) | 79.1° 22:15 | 10.97 | 16% | 148.2° |
| 2025-11-16 Sun | 100 | 30 | 30 | 18:40–19:00 (good, 0.33 h) | 79.1° 22:10 | 10.99 | 10% | 157.8° |
| 2025-11-17 Mon | 100 | 0 | 0 | — | 79.1° 22:10 | 11.02 | 5% | 163.9° |
| 2025-11-18 Tue | 100 | 0 | 0 | — | 79.1° 22:05 | 11.05 | 2% | 162.5° |
| 2025-11-19 Wed | 100 | 5 | 5 | 02:00–03:00 (marginal, 1.0 h) | 79.1° 22:00 | 11.08 | 0% | 155.1° |
| 2025-11-20 Thu | 100 | 10 | 10 | 21:00–23:00 (marginal, 2.0 h) | 79.1° 21:55 | 11.1 | 0% | 145.2° |
| 2025-11-21 Fri | 100 | 0 | 0 | — | 79.1° 21:50 | 11.13 | 3% | 134.4° |
| 2025-11-22 Sat | 100 | 20 | 20 | 20:00–21:00 (good, 1.0 h) | 79.1° 21:50 | 11.15 | 6% | 123.3° |
| 2025-11-23 Sun | 100 | 99 | 99 | 18:35–03:15 (good, 8.67 h) | 79.1° 21:45 | 11.17 | 12% | 111.8° |
| 2025-11-24 Mon | 100 | 86 | 86 | 18:35–02:00 (good, 7.42 h) | 79.1° 21:40 | 11.2 | 18% | 100.2° |
| 2025-11-25 Tue | 100 | 0 | 0 | — | 79.1° 21:35 | 11.22 | 27% | 88.3° |
| 2025-11-26 Wed | 100 | 4 | 4 | 21:00–22:00 (marginal, 1.0 h) | 79.1° 21:30 | 11.24 | 36% | 76.2° |
| 2025-11-27 Thu | 100 | 0 | 0 | — | 79.1° 21:30 | 11.26 | 46% | 63.9° |
| 2025-11-28 Fri | 94 | 0 | 0 | — | 79.1° 21:25 | 11.28 | 57% | 51.4° |
| 2025-11-29 Sat | 85 | 0 | 0 | — | 79.1° 21:20 | 11.3 | 67% | 38.7° |
| 2025-11-30 Sun | 54 | 0 | 0 | — | 79.1° 21:15 | 11.32 | 78% | 26.6° |
| 2025-12-01 Mon | 37 | 85 | 32 | 18:35–02:00 (marginal, 7.42 h) | 79.1° 21:15 | 11.34 | 86% | 17.1° |
| 2025-12-02 Tue | 26 | 37 | 10 | 02:00–02:25 (marginal, 0.42 h) | 79.1° 21:10 | 11.35 | 94% | 17.3° |
| 2025-12-03 Wed | 23 | 12 | 3 | — | 79.1° 21:05 | 11.37 | 98% | 27.4° |
| 2025-12-04 Thu | 35 | 0 | 0 | — | 79.1° 21:00 | 11.38 | 100% | 40.7° |
| 2025-12-05 Fri | 60 | 0 | 0 | — | 79.1° 20:55 | 11.4 | 98% | 54.9° |
| 2025-12-06 Sat | 74 | 0 | 0 | — | 79.1° 20:55 | 11.41 | 94% | 69.1° |
| 2025-12-07 Sun | 100 | 3 | 3 | — | 79.1° 20:50 | 11.42 | 88% | 83.1° |
| 2025-12-08 Mon | 100 | 18 | 18 | 18:35–20:00 (good, 1.42 h) | 79.1° 20:45 | 11.44 | 79% | 96.8° |
| 2025-12-09 Tue | 100 | 11 | 11 | 23:00–01:00 (marginal, 2.0 h) | 79.1° 20:40 | 11.45 | 70% | 109.9° |
| 2025-12-10 Wed | 100 | 15 | 15 | 23:00–01:00 (marginal, 2.0 h) | 79.1° 20:35 | 11.46 | 60% | 122.5° |
| 2025-12-11 Thu | 100 | 51 | 51 | 18:35–22:00 (good, 3.42 h) | 79.1° 20:35 | 11.47 | 49% | 134.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-11-12&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.