← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-04-03 Sun | 51 | — | unknown | 03:25–05:25 (good, 2.0 h) | 87.2° 09:30 | 7.98 | 70% | 113.8° |
| 2039-04-04 Mon | 51 | — | unknown | 03:25–05:25 (good, 2.0 h) | 87.2° 09:30 | 7.93 | 79% | 116.4° |
| 2039-04-05 Tue | 45 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.2° 09:25 | 7.87 | 87% | 117.6° |
| 2039-04-06 Wed | 45 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.2° 09:20 | 7.81 | 93% | 117.2° |
| 2039-04-07 Thu | 44 | — | unknown | 03:20–05:20 (good, 2.0 h) | 87.2° 09:15 | 7.76 | 98% | 115.0° |
| 2039-04-08 Fri | 41 | — | unknown | 03:20–05:15 (good, 1.92 h) | 87.2° 09:10 | 7.7 | 100% | 111.1° |
| 2039-04-09 Sat | 39 | — | unknown | 03:20–05:15 (good, 1.92 h) | 87.2° 09:10 | 7.64 | 99% | 105.8° |
| 2039-04-10 Sun | 37 | — | unknown | 03:20–05:10 (good, 1.83 h) | 87.2° 09:05 | 7.59 | 95% | 99.6° |
| 2039-04-11 Mon | 36 | — | unknown | 03:15–05:10 (good, 1.92 h) | 87.2° 09:00 | 7.53 | 89% | 92.8° |
| 2039-04-12 Tue | 38 | — | unknown | 03:10–05:10 (good, 2.0 h) | 87.2° 08:55 | 7.47 | 80% | 86.0° |
| 2039-04-13 Wed | 39 | — | unknown | 03:00–05:05 (good, 2.08 h) | 87.2° 08:50 | 7.42 | 70% | 79.5° |
| 2039-04-14 Thu | 44 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.2° 08:50 | 7.36 | 59% | 73.7° |
| 2039-04-15 Fri | 52 | — | unknown | 02:30–05:00 (good, 2.5 h) | 87.2° 08:45 | 7.3 | 48% | 68.9° |
| 2039-04-16 Sat | 59 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.2° 08:40 | 7.24 | 37% | 65.3° |
| 2039-04-17 Sun | 65 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.2° 08:35 | 7.19 | 27% | 63.1° |
| 2039-04-18 Mon | 67 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.2° 08:30 | 7.13 | 19% | 62.4° |
| 2039-04-19 Tue | 68 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.2° 08:30 | 7.07 | 12% | 63.2° |
| 2039-04-20 Wed | 70 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.2° 08:25 | 7.01 | 6% | 65.3° |
| 2039-04-21 Thu | 70 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.2° 08:20 | 6.95 | 2% | 68.6° |
| 2039-04-22 Fri | 72 | — | unknown | 02:00–04:50 (good, 2.83 h) | 87.2° 08:15 | 6.9 | 0% | 72.7° |
| 2039-04-23 Sat | 71 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.2° 08:15 | 6.84 | 0% | 77.5° |
| 2039-04-24 Sun | 73 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.2° 08:10 | 6.78 | 2% | 82.7° |
| 2039-04-25 Mon | 75 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.2° 08:05 | 6.72 | 6% | 88.1° |
| 2039-04-26 Tue | 75 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.2° 08:00 | 6.66 | 11% | 93.6° |
| 2039-04-27 Wed | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.2° 07:55 | 6.6 | 17% | 98.9° |
| 2039-04-28 Thu | 76 | — | unknown | 01:40–04:35 (good, 2.92 h) | 87.2° 07:55 | 6.55 | 25% | 104.0° |
| 2039-04-29 Fri | 78 | — | unknown | 01:40–04:35 (good, 2.92 h) | 87.2° 07:50 | 6.49 | 34% | 108.5° |
| 2039-04-30 Sat | 79 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:45 | 6.43 | 43% | 112.4° |
| 2039-05-01 Sun | 78 | — | unknown | 01:35–04:30 (good, 2.92 h) | 87.2° 07:40 | 6.37 | 53% | 115.4° |
| 2039-05-02 Mon | 78 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:35 | 6.31 | 64% | 117.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-04-03&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.