← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-06-07 Sat | 1 | — | unknown | — | 79.2° 09:50 | 4.6 | 82% | 88.1° |
| 2042-06-08 Sun | 1 | — | unknown | — | 79.2° 09:45 | 4.58 | 73% | 75.1° |
| 2042-06-09 Mon | 1 | — | unknown | — | 79.2° 09:40 | 4.55 | 62% | 62.1° |
| 2042-06-10 Tue | 2 | — | unknown | — | 79.2° 09:40 | 4.53 | 51% | 49.2° |
| 2042-06-11 Wed | 2 | — | unknown | — | 79.2° 09:35 | 4.51 | 40% | 36.7° |
| 2042-06-12 Thu | 3 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:30 | 4.49 | 29% | 25.6° |
| 2042-06-13 Fri | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:25 | 4.48 | 19% | 18.9° |
| 2042-06-14 Sat | 6 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:25 | 4.46 | 11% | 21.4° |
| 2042-06-15 Sun | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.2° 09:20 | 4.45 | 5% | 30.9° |
| 2042-06-16 Mon | 7 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.2° 09:15 | 4.44 | 1% | 42.9° |
| 2042-06-17 Tue | 8 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.2° 09:10 | 4.43 | 0% | 55.6° |
| 2042-06-18 Wed | 10 | — | unknown | 03:10–04:30 (marginal, 1.33 h) | 79.2° 09:05 | 4.43 | 2% | 68.3° |
| 2042-06-19 Thu | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 09:05 | 4.42 | 6% | 80.9° |
| 2042-06-20 Fri | 12 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 09:00 | 4.42 | 11% | 93.2° |
| 2042-06-21 Sat | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:55 | 4.42 | 18% | 105.2° |
| 2042-06-22 Sun | 15 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:50 | 4.42 | 26% | 116.9° |
| 2042-06-23 Mon | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.2° 08:45 | 4.43 | 36% | 128.1° |
| 2042-06-24 Tue | 18 | — | unknown | 03:15–03:40 (good, 0.42 h) | 79.2° 08:45 | 4.44 | 45% | 138.8° |
| 2042-06-25 Wed | 20 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.2° 08:40 | 4.44 | 54% | 148.8° |
| 2042-06-26 Thu | 22 | — | unknown | 03:10–03:40 (good, 0.5 h) | 79.2° 08:35 | 4.46 | 64% | 157.1° |
| 2042-06-27 Fri | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.2° 08:30 | 4.47 | 72% | 161.4° |
| 2042-06-28 Sat | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.2° 08:30 | 4.48 | 81% | 158.9° |
| 2042-06-29 Sun | 26 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.2° 08:25 | 4.5 | 88% | 151.1° |
| 2042-06-30 Mon | 27 | — | unknown | 03:00–03:45 (good, 0.75 h) | 79.2° 08:20 | 4.52 | 94% | 140.8° |
| 2042-07-01 Tue | 25 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.2° 08:15 | 4.54 | 98% | 129.3° |
| 2042-07-02 Wed | 25 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.2° 08:10 | 4.56 | 100% | 117.2° |
| 2042-07-03 Thu | 22 | — | unknown | 03:00–03:45 (good, 0.75 h) | 79.2° 08:10 | 4.59 | 99% | 104.5° |
| 2042-07-04 Fri | 19 | — | unknown | 03:05–03:45 (good, 0.67 h) | 79.2° 08:05 | 4.61 | 97% | 91.5° |
| 2042-07-05 Sat | 18 | — | unknown | 02:05–03:50 (marginal, 1.75 h) | 79.2° 08:00 | 4.64 | 92% | 78.3° |
| 2042-07-06 Sun | 16 | — | unknown | 02:05–03:50 (marginal, 1.75 h) | 79.2° 07:55 | 4.67 | 84% | 65.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-06-07&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.