← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-03-13 Fri | 31 | — | unknown | 03:55–05:05 (good, 1.17 h) | 71.1° 08:55 | 9.06 | 8% | 44.7° |
| 2037-03-14 Sat | 33 | — | unknown | 03:50–05:05 (good, 1.25 h) | 71.1° 08:50 | 9.01 | 4% | 49.3° |
| 2037-03-15 Sun | 32 | — | unknown | 03:45–05:00 (good, 1.25 h) | 71.1° 08:45 | 8.96 | 1% | 55.5° |
| 2037-03-16 Mon | 33 | — | unknown | 03:40–05:00 (good, 1.33 h) | 71.1° 08:45 | 8.91 | 0% | 62.9° |
| 2037-03-17 Tue | 34 | — | unknown | 03:35–04:55 (good, 1.33 h) | 71.1° 08:40 | 8.86 | 1% | 71.1° |
| 2037-03-18 Wed | 35 | — | unknown | 03:35–04:55 (good, 1.33 h) | 71.1° 08:35 | 8.81 | 4% | 79.8° |
| 2037-03-19 Thu | 36 | — | unknown | 03:30–04:55 (good, 1.42 h) | 71.1° 08:30 | 8.76 | 8% | 88.7° |
| 2037-03-20 Fri | 36 | — | unknown | 03:25–04:50 (good, 1.42 h) | 71.1° 08:25 | 8.7 | 14% | 97.9° |
| 2037-03-21 Sat | 38 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:25 | 8.65 | 22% | 107.0° |
| 2037-03-22 Sun | 39 | — | unknown | 03:20–04:50 (good, 1.5 h) | 71.1° 08:20 | 8.6 | 31% | 115.8° |
| 2037-03-23 Mon | 39 | — | unknown | 03:15–04:45 (good, 1.5 h) | 71.1° 08:15 | 8.55 | 41% | 124.0° |
| 2037-03-24 Tue | 40 | — | unknown | 03:10–04:45 (good, 1.58 h) | 71.1° 08:10 | 8.5 | 52% | 131.0° |
| 2037-03-25 Wed | 40 | — | unknown | 03:05–04:40 (good, 1.58 h) | 71.1° 08:05 | 8.44 | 63% | 136.0° |
| 2037-03-26 Thu | 40 | — | unknown | 03:10–04:40 (good, 1.5 h) | 71.1° 08:05 | 8.39 | 73% | 137.8° |
| 2037-03-27 Fri | 40 | — | unknown | 03:05–04:40 (good, 1.58 h) | 71.1° 08:00 | 8.34 | 83% | 135.7° |
| 2037-03-28 Sat | 36 | — | unknown | 04:05–05:35 (good, 1.5 h) | 71.1° 08:55 | 8.28 | 91% | 130.0° |
| 2037-03-29 Sun | 36 | — | unknown | 04:00–05:35 (good, 1.58 h) | 71.1° 08:50 | 8.23 | 97% | 121.8° |
| 2037-03-30 Mon | 33 | — | unknown | 04:05–05:35 (good, 1.5 h) | 71.1° 08:50 | 8.17 | 100% | 111.9° |
| 2037-03-31 Tue | 28 | — | unknown | 04:05–05:30 (good, 1.42 h) | 71.1° 08:45 | 8.12 | 99% | 101.2° |
| 2037-04-01 Wed | 25 | — | unknown | 04:35–05:30 (good, 0.92 h) | 71.1° 08:40 | 8.06 | 96% | 90.3° |
| 2037-04-02 Thu | 23 | — | unknown | 05:00–05:25 (good, 0.42 h) | 71.1° 08:35 | 8.01 | 91% | 79.7° |
| 2037-04-03 Fri | 22 | — | unknown | 05:10–05:25 (good, 0.25 h) | 71.1° 08:30 | 7.95 | 84% | 69.8° |
| 2037-04-04 Sat | 23 | — | unknown | 05:00–05:25 (good, 0.42 h) | 71.1° 08:30 | 7.9 | 75% | 60.7° |
| 2037-04-05 Sun | 25 | — | unknown | 04:15–05:20 (good, 1.08 h) | 71.1° 08:25 | 7.84 | 65% | 53.0° |
| 2037-04-06 Mon | 29 | — | unknown | 03:40–05:20 (good, 1.67 h) | 71.1° 08:20 | 7.79 | 55% | 47.1° |
| 2037-04-07 Tue | 34 | — | unknown | 03:30–05:15 (good, 1.75 h) | 71.1° 08:15 | 7.73 | 46% | 43.4° |
| 2037-04-08 Wed | 43 | — | unknown | 03:10–05:15 (good, 2.08 h) | 71.1° 08:10 | 7.67 | 36% | 42.3° |
| 2037-04-09 Thu | 50 | — | unknown | 03:05–05:15 (good, 2.17 h) | 71.1° 08:10 | 7.62 | 27% | 44.0° |
| 2037-04-10 Fri | 53 | — | unknown | 03:05–05:10 (good, 2.08 h) | 71.1° 08:05 | 7.56 | 19% | 48.0° |
| 2037-04-11 Sat | 56 | — | unknown | 03:00–05:10 (good, 2.17 h) | 71.1° 08:00 | 7.5 | 12% | 53.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-03-13&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.