← 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. |
|---|---|---|---|---|---|---|---|---|
| 2035-04-19 Thu | 56 | — | unknown | 02:25–04:55 (good, 2.5 h) | 87.2° 08:30 | 7.07 | 93% | 119.1° |
| 2035-04-20 Fri | 53 | — | unknown | 02:30–04:55 (good, 2.42 h) | 87.2° 08:25 | 7.01 | 97% | 114.7° |
| 2035-04-21 Sat | 49 | — | unknown | 02:30–04:50 (good, 2.33 h) | 87.2° 08:20 | 6.96 | 100% | 109.3° |
| 2035-04-22 Sun | 46 | — | unknown | 02:30–04:50 (good, 2.33 h) | 87.2° 08:15 | 6.9 | 100% | 103.2° |
| 2035-04-23 Mon | 42 | — | unknown | 02:30–04:45 (good, 2.25 h) | 87.2° 08:15 | 6.84 | 98% | 96.8° |
| 2035-04-24 Tue | 40 | — | unknown | 02:45–04:45 (good, 2.0 h) | 87.2° 08:10 | 6.78 | 94% | 90.2° |
| 2035-04-25 Wed | 39 | — | unknown | 02:50–04:45 (good, 1.92 h) | 87.2° 08:05 | 6.72 | 90% | 83.7° |
| 2035-04-26 Thu | 39 | — | unknown | 02:30–04:40 (good, 2.17 h) | 87.2° 08:00 | 6.67 | 83% | 77.4° |
| 2035-04-27 Fri | 42 | — | unknown | 02:10–04:40 (good, 2.5 h) | 87.2° 07:55 | 6.61 | 75% | 71.6° |
| 2035-04-28 Sat | 45 | — | unknown | 02:05–04:35 (good, 2.5 h) | 87.2° 07:55 | 6.55 | 67% | 66.4° |
| 2035-04-29 Sun | 55 | — | unknown | 01:35–04:35 (good, 3.0 h) | 87.2° 07:50 | 6.49 | 57% | 62.0° |
| 2035-04-30 Mon | 63 | — | unknown | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.43 | 48% | 58.8° |
| 2035-05-01 Tue | 70 | — | unknown | 01:25–04:30 (good, 3.08 h) | 87.2° 07:40 | 6.37 | 38% | 57.1° |
| 2035-05-02 Wed | 77 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.32 | 28% | 57.1° |
| 2035-05-03 Thu | 83 | — | unknown | 01:20–04:30 (good, 3.17 h) | 87.2° 07:35 | 6.26 | 19% | 59.0° |
| 2035-05-04 Fri | 83 | — | unknown | 01:15–04:25 (good, 3.17 h) | 87.2° 07:30 | 6.2 | 11% | 62.9° |
| 2035-05-05 Sat | 85 | — | unknown | 01:10–04:25 (good, 3.25 h) | 87.2° 07:25 | 6.14 | 5% | 68.4° |
| 2035-05-06 Sun | 87 | — | unknown | 01:05–04:25 (good, 3.33 h) | 87.2° 07:20 | 6.09 | 1% | 75.2° |
| 2035-05-07 Mon | 87 | — | unknown | 01:05–04:20 (good, 3.25 h) | 87.2° 07:20 | 6.03 | 0% | 82.9° |
| 2035-05-08 Tue | 89 | — | unknown | 01:00–04:20 (good, 3.33 h) | 87.2° 07:15 | 5.97 | 2% | 91.0° |
| 2035-05-09 Wed | 89 | — | unknown | 00:55–04:15 (good, 3.33 h) | 87.2° 07:10 | 5.92 | 7% | 99.2° |
| 2035-05-10 Thu | 91 | — | unknown | 00:50–04:15 (good, 3.42 h) | 87.2° 07:05 | 5.86 | 14% | 106.7° |
| 2035-05-11 Fri | 93 | — | unknown | 00:45–04:15 (good, 3.5 h) | 87.2° 07:00 | 5.81 | 23% | 113.3° |
| 2035-05-12 Sat | 92 | — | unknown | 00:45–04:10 (good, 3.42 h) | 87.2° 07:00 | 5.75 | 33% | 118.5° |
| 2035-05-13 Sun | 93 | — | unknown | 00:45–04:10 (good, 3.42 h) | 87.2° 06:55 | 5.7 | 44% | 121.8° |
| 2035-05-14 Mon | 94 | — | unknown | 00:40–04:10 (good, 3.5 h) | 87.2° 06:50 | 5.64 | 55% | 123.0° |
| 2035-05-15 Tue | 92 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:45 | 5.59 | 66% | 122.3° |
| 2035-05-16 Wed | 92 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:40 | 5.53 | 75% | 119.7° |
| 2035-05-17 Thu | 83 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:40 | 5.48 | 83% | 115.7° |
| 2035-05-18 Fri | 78 | — | unknown | 00:40–04:05 (good, 3.42 h) | 87.2° 06:35 | 5.43 | 90% | 110.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2035-04-19&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.