← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-03-06 Thu | 17 | — | unknown | 19:50–20:20 (good, 0.5 h) | 79.2° 15:00 | 9.41 | 100% | 129.7° |
| 2042-03-07 Fri | 15 | — | unknown | 19:55–20:20 (good, 0.42 h) | 79.2° 14:55 | 9.36 | 99% | 140.2° |
| 2042-03-08 Sat | 17 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.2° 14:50 | 9.31 | 96% | 150.0° |
| 2042-03-09 Sun | 16 | — | unknown | 19:55–20:20 (good, 0.42 h) | 79.2° 14:50 | 9.27 | 92% | 157.8° |
| 2042-03-10 Mon | 14 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.2° 14:45 | 9.22 | 86% | 161.2° |
| 2042-03-11 Tue | 11 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.2° 14:40 | 9.17 | 78% | 157.9° |
| 2042-03-12 Wed | 10 | — | unknown | 20:00–20:10 (good, 0.17 h) | 79.2° 14:35 | 9.12 | 70% | 149.9° |
| 2042-03-13 Thu | 9 | — | unknown | 20:00–20:05 (good, 0.08 h) | 79.2° 14:30 | 9.07 | 60% | 139.6° |
| 2042-03-14 Fri | 7 | — | unknown | 19:30–20:30 (marginal, 1.0 h) | 79.2° 14:30 | 9.02 | 50% | 128.3° |
| 2042-03-15 Sat | 5 | — | unknown | 20:05–20:25 (marginal, 0.33 h) | 79.2° 14:25 | 8.97 | 40% | 116.2° |
| 2042-03-16 Sun | 5 | — | unknown | 19:30–19:55 (marginal, 0.42 h) | 79.2° 14:20 | 8.92 | 30% | 103.6° |
| 2042-03-17 Mon | 4 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.2° 14:15 | 8.87 | 20% | 90.3° |
| 2042-03-18 Tue | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.2° 14:15 | 8.82 | 11% | 76.7° |
| 2042-03-19 Wed | 2 | — | unknown | 19:35–19:40 (marginal, 0.08 h) | 79.2° 14:10 | 8.77 | 5% | 62.7° |
| 2042-03-20 Thu | 1 | — | unknown | — | 79.2° 14:05 | 8.72 | 1% | 48.8° |
| 2042-03-21 Fri | 1 | — | unknown | — | 79.2° 14:00 | 8.66 | 0% | 35.4° |
| 2042-03-22 Sat | 1 | — | unknown | — | 79.2° 13:55 | 8.61 | 2% | 24.1° |
| 2042-03-23 Sun | 1 | — | unknown | — | 79.2° 13:55 | 8.56 | 7% | 18.7° |
| 2042-03-24 Mon | 0 | — | unknown | — | 79.2° 13:50 | 8.51 | 15% | 23.4° |
| 2042-03-25 Tue | 0 | — | unknown | — | 79.2° 13:45 | 8.45 | 24% | 33.7° |
| 2042-03-26 Wed | 0 | — | unknown | — | 79.2° 13:40 | 8.4 | 34% | 45.5° |
| 2042-03-27 Thu | 0 | — | unknown | — | 79.2° 13:35 | 8.35 | 44% | 57.7° |
| 2042-03-28 Fri | 0 | — | unknown | — | 79.2° 13:35 | 8.29 | 55% | 69.7° |
| 2042-03-29 Sat | 0 | — | unknown | — | 79.2° 13:30 | 8.24 | 64% | 81.6° |
| 2042-03-30 Sun | 0 | — | unknown | — | 79.2° 14:25 | 8.18 | 74% | 93.2° |
| 2042-03-31 Mon | 0 | — | unknown | — | 79.2° 14:20 | 8.13 | 82% | 104.7° |
| 2042-04-01 Tue | 0 | — | unknown | — | 79.2° 14:15 | 8.08 | 88% | 115.9° |
| 2042-04-02 Wed | 0 | — | unknown | — | 79.2° 14:15 | 8.02 | 94% | 126.9° |
| 2042-04-03 Thu | 0 | — | unknown | — | 79.2° 14:10 | 7.97 | 98% | 137.5° |
| 2042-04-04 Fri | 0 | — | unknown | — | 79.2° 14:05 | 7.91 | 100% | 147.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-03-06&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.