← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-04-14 Sat | 65 | — | unknown | 02:30–05:05 (good, 2.58 h) | 87.2° 08:45 | 7.32 | 11% | 87.4° |
| 2040-04-15 Sun | 65 | — | unknown | 02:25–05:00 (good, 2.58 h) | 87.2° 08:40 | 7.26 | 18% | 93.0° |
| 2040-04-16 Mon | 67 | — | unknown | 02:20–05:00 (good, 2.67 h) | 87.2° 08:35 | 7.2 | 26% | 98.4° |
| 2040-04-17 Tue | 66 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:35 | 7.14 | 35% | 103.5° |
| 2040-04-18 Wed | 67 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:30 | 7.08 | 44% | 108.0° |
| 2040-04-19 Thu | 67 | — | unknown | 02:20–04:55 (good, 2.58 h) | 87.2° 08:25 | 7.03 | 54% | 111.9° |
| 2040-04-20 Fri | 67 | — | unknown | 02:15–04:50 (good, 2.58 h) | 87.2° 08:20 | 6.97 | 63% | 114.8° |
| 2040-04-21 Sat | 67 | — | unknown | 02:15–04:50 (good, 2.58 h) | 87.2° 08:20 | 6.91 | 72% | 116.7° |
| 2040-04-22 Sun | 60 | — | unknown | 02:10–04:45 (good, 2.58 h) | 87.2° 08:15 | 6.85 | 81% | 117.3° |
| 2040-04-23 Mon | 59 | — | unknown | 02:10–04:45 (good, 2.58 h) | 87.2° 08:10 | 6.79 | 88% | 116.5° |
| 2040-04-24 Tue | 57 | — | unknown | 02:10–04:45 (good, 2.58 h) | 87.2° 08:05 | 6.74 | 94% | 114.2° |
| 2040-04-25 Wed | 54 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 08:00 | 6.68 | 98% | 110.4° |
| 2040-04-26 Thu | 51 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 08:00 | 6.62 | 100% | 105.5° |
| 2040-04-27 Fri | 48 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 07:55 | 6.56 | 99% | 99.6° |
| 2040-04-28 Sat | 46 | — | unknown | 02:05–04:35 (good, 2.5 h) | 87.2° 07:50 | 6.5 | 96% | 93.2° |
| 2040-04-29 Sun | 46 | — | unknown | 02:00–04:35 (good, 2.58 h) | 87.2° 07:45 | 6.44 | 90% | 86.5° |
| 2040-04-30 Mon | 47 | — | unknown | 01:55–04:30 (good, 2.58 h) | 87.2° 07:40 | 6.39 | 81% | 80.1° |
| 2040-05-01 Tue | 52 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.33 | 71% | 74.2° |
| 2040-05-02 Wed | 64 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.27 | 60% | 69.2° |
| 2040-05-03 Thu | 72 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:30 | 6.21 | 49% | 65.5° |
| 2040-05-04 Fri | 79 | — | unknown | 01:10–04:25 (good, 3.25 h) | 87.2° 07:25 | 6.16 | 38% | 63.3° |
| 2040-05-05 Sat | 86 | — | unknown | 01:05–04:25 (good, 3.33 h) | 87.2° 07:25 | 6.1 | 27% | 62.7° |
| 2040-05-06 Sun | 86 | — | unknown | 01:05–04:20 (good, 3.25 h) | 87.2° 07:20 | 6.04 | 18% | 63.9° |
| 2040-05-07 Mon | 88 | — | unknown | 01:00–04:20 (good, 3.33 h) | 87.2° 07:15 | 5.98 | 11% | 66.4° |
| 2040-05-08 Tue | 90 | — | unknown | 00:55–04:20 (good, 3.42 h) | 87.2° 07:10 | 5.93 | 5% | 70.2° |
| 2040-05-09 Wed | 91 | — | unknown | 00:50–04:15 (good, 3.42 h) | 87.2° 07:05 | 5.87 | 2% | 74.9° |
| 2040-05-10 Thu | 91 | — | unknown | 00:50–04:15 (good, 3.42 h) | 87.2° 07:05 | 5.82 | 0% | 80.1° |
| 2040-05-11 Fri | 94 | — | unknown | 00:45–04:15 (good, 3.5 h) | 87.2° 07:00 | 5.76 | 1% | 85.6° |
| 2040-05-12 Sat | 94 | — | unknown | 00:40–04:10 (good, 3.5 h) | 87.2° 06:55 | 5.71 | 3% | 91.2° |
| 2040-05-13 Sun | 97 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.2° 06:50 | 5.65 | 7% | 96.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-04-14&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.