← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-12-15 Mon | 32 | — | unknown | 18:35–19:55 (good, 1.33 h) | 71.1° 14:45 | 11.49 | 11% | 47.2° |
| 2042-12-16 Tue | 28 | — | unknown | 18:35–19:45 (good, 1.17 h) | 71.1° 14:40 | 11.5 | 19% | 47.0° |
| 2042-12-17 Wed | 23 | — | unknown | 18:35–19:35 (good, 1.0 h) | 71.1° 14:40 | 11.5 | 28% | 49.5° |
| 2042-12-18 Thu | 20 | — | unknown | 18:35–19:25 (good, 0.83 h) | 71.1° 14:35 | 11.5 | 38% | 54.6° |
| 2042-12-19 Fri | 17 | — | unknown | 18:35–19:10 (good, 0.58 h) | 71.1° 14:30 | 11.51 | 49% | 61.6° |
| 2042-12-20 Sat | 14 | — | unknown | 18:35–18:45 (good, 0.17 h) | 71.1° 14:25 | 11.51 | 60% | 70.0° |
| 2042-12-21 Sun | 13 | — | unknown | 18:35–19:55 (marginal, 1.33 h) | 71.1° 14:25 | 11.51 | 71% | 79.4° |
| 2042-12-22 Mon | 12 | — | unknown | 18:05–19:50 (marginal, 1.75 h) | 71.1° 14:20 | 11.51 | 81% | 89.2° |
| 2042-12-23 Tue | 12 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 14:15 | 11.51 | 89% | 99.2° |
| 2042-12-24 Wed | 13 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 14:10 | 11.5 | 95% | 108.8° |
| 2042-12-25 Thu | 14 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 14:05 | 11.5 | 99% | 117.7° |
| 2042-12-26 Fri | 14 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 14:05 | 11.5 | 100% | 125.1° |
| 2042-12-27 Sat | 14 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 14:00 | 11.49 | 98% | 130.5° |
| 2042-12-28 Sun | 14 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 13:55 | 11.48 | 94% | 133.1° |
| 2042-12-29 Mon | 12 | — | unknown | 18:40–19:00 (good, 0.33 h) | 71.1° 13:50 | 11.48 | 88% | 132.8° |
| 2042-12-30 Tue | 11 | — | unknown | 18:40–18:55 (good, 0.25 h) | 71.1° 13:45 | 11.47 | 80% | 129.8° |
| 2042-12-31 Wed | 9 | — | unknown | 18:45–18:50 (good, 0.08 h) | 71.1° 13:45 | 11.46 | 72% | 124.8° |
| 2043-01-01 Thu | 8 | — | unknown | 18:10–19:15 (marginal, 1.08 h) | 71.1° 13:40 | 11.45 | 62% | 118.5° |
| 2043-01-02 Fri | 7 | — | unknown | 18:45–19:10 (marginal, 0.42 h) | 71.1° 13:35 | 11.44 | 53% | 111.3° |
| 2043-01-03 Sat | 6 | — | unknown | 18:10–18:40 (marginal, 0.5 h) | 71.1° 13:30 | 11.43 | 44% | 103.7° |
| 2043-01-04 Sun | 5 | — | unknown | 18:10–18:35 (marginal, 0.42 h) | 71.1° 13:30 | 11.42 | 34% | 95.7° |
| 2043-01-05 Mon | 3 | — | unknown | 18:15–18:30 (marginal, 0.25 h) | 71.1° 13:25 | 11.4 | 26% | 87.6° |
| 2043-01-06 Tue | 3 | — | unknown | 18:15–18:25 (marginal, 0.17 h) | 71.1° 13:20 | 11.39 | 18% | 79.4° |
| 2043-01-07 Wed | 2 | — | unknown | 18:15–18:20 (marginal, 0.08 h) | 71.1° 13:15 | 11.38 | 11% | 71.5° |
| 2043-01-08 Thu | 1 | — | unknown | 18:15–18:20 (marginal, 0.08 h) | 71.1° 13:10 | 11.36 | 6% | 63.9° |
| 2043-01-09 Fri | 1 | — | unknown | — | 71.1° 13:10 | 11.34 | 2% | 57.0° |
| 2043-01-10 Sat | 1 | — | unknown | — | 71.1° 13:05 | 11.33 | 0% | 51.4° |
| 2043-01-11 Sun | 1 | — | unknown | — | 71.1° 13:00 | 11.31 | 1% | 47.7° |
| 2043-01-12 Mon | 1 | — | unknown | — | 71.1° 12:55 | 11.29 | 3% | 46.6° |
| 2043-01-13 Tue | 0 | — | unknown | — | 71.1° 12:50 | 11.27 | 8% | 48.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-12-15&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.