← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-04-12 Tue | 37 | — | unknown | 03:10–05:10 (good, 2.0 h) | 87.3° 08:55 | 7.47 | 80% | 86.0° |
| 2039-04-13 Wed | 39 | — | unknown | 03:00–05:05 (good, 2.08 h) | 87.3° 08:50 | 7.42 | 70% | 79.5° |
| 2039-04-14 Thu | 44 | — | unknown | 02:50–05:05 (good, 2.25 h) | 87.3° 08:50 | 7.36 | 59% | 73.7° |
| 2039-04-15 Fri | 52 | — | unknown | 02:30–05:00 (good, 2.5 h) | 87.3° 08:45 | 7.3 | 48% | 68.8° |
| 2039-04-16 Sat | 59 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.3° 08:40 | 7.24 | 37% | 65.2° |
| 2039-04-17 Sun | 65 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.3° 08:35 | 7.19 | 27% | 63.0° |
| 2039-04-18 Mon | 66 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:35 | 7.13 | 19% | 62.3° |
| 2039-04-19 Tue | 68 | — | unknown | 02:15–04:55 (good, 2.67 h) | 87.3° 08:30 | 7.07 | 12% | 63.1° |
| 2039-04-20 Wed | 70 | — | unknown | 02:10–04:55 (good, 2.75 h) | 87.3° 08:25 | 7.01 | 6% | 65.3° |
| 2039-04-21 Thu | 70 | — | unknown | 02:05–04:50 (good, 2.75 h) | 87.3° 08:20 | 6.95 | 2% | 68.6° |
| 2039-04-22 Fri | 71 | — | unknown | 02:00–04:50 (good, 2.83 h) | 87.3° 08:15 | 6.9 | 0% | 72.7° |
| 2039-04-23 Sat | 71 | — | unknown | 02:00–04:45 (good, 2.75 h) | 87.3° 08:15 | 6.84 | 0% | 77.5° |
| 2039-04-24 Sun | 73 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.3° 08:10 | 6.78 | 2% | 82.7° |
| 2039-04-25 Mon | 75 | — | unknown | 01:50–04:45 (good, 2.92 h) | 87.3° 08:05 | 6.72 | 6% | 88.1° |
| 2039-04-26 Tue | 75 | — | unknown | 01:45–04:40 (good, 2.92 h) | 87.3° 08:00 | 6.66 | 11% | 93.6° |
| 2039-04-27 Wed | 77 | — | unknown | 01:40–04:40 (good, 3.0 h) | 87.3° 07:55 | 6.6 | 17% | 98.9° |
| 2039-04-28 Thu | 76 | — | unknown | 01:40–04:35 (good, 2.92 h) | 87.3° 07:55 | 6.55 | 25% | 104.0° |
| 2039-04-29 Fri | 77 | — | unknown | 01:40–04:35 (good, 2.92 h) | 87.3° 07:50 | 6.49 | 34% | 108.6° |
| 2039-04-30 Sat | 79 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.3° 07:45 | 6.43 | 43% | 112.5° |
| 2039-05-01 Sun | 77 | — | unknown | 01:35–04:30 (good, 2.92 h) | 87.3° 07:40 | 6.37 | 53% | 115.5° |
| 2039-05-02 Mon | 77 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.2° 07:40 | 6.31 | 64% | 117.2° |
| 2039-05-03 Tue | 77 | — | unknown | 01:30–04:30 (good, 3.0 h) | 87.3° 07:35 | 6.26 | 74% | 117.5° |
| 2039-05-04 Wed | 69 | — | unknown | 01:30–04:25 (good, 2.92 h) | 87.3° 07:30 | 6.2 | 83% | 116.1° |
| 2039-05-05 Thu | 66 | — | unknown | 01:30–04:25 (good, 2.92 h) | 87.3° 07:25 | 6.14 | 91% | 113.0° |
| 2039-05-06 Fri | 61 | — | unknown | 01:30–04:20 (good, 2.83 h) | 87.3° 07:20 | 6.08 | 96% | 108.3° |
| 2039-05-07 Sat | 56 | — | unknown | 01:30–04:20 (good, 2.83 h) | 87.3° 07:20 | 6.03 | 100% | 102.5° |
| 2039-05-08 Sun | 52 | — | unknown | 01:30–04:20 (good, 2.83 h) | 87.3° 07:15 | 5.97 | 100% | 95.8° |
| 2039-05-09 Mon | 49 | — | unknown | 01:40–04:15 (good, 2.58 h) | 87.3° 07:10 | 5.91 | 97% | 88.8° |
| 2039-05-10 Tue | 49 | — | unknown | 01:25–04:15 (good, 2.83 h) | 87.3° 07:05 | 5.86 | 91% | 82.0° |
| 2039-05-11 Wed | 51 | — | unknown | 01:15–04:15 (good, 3.0 h) | 87.3° 07:00 | 5.8 | 83% | 75.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-04-12&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.