← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-02-18 Wed | 65 | — | unknown | 03:05–05:40 (good, 2.58 h) | 87.1° 09:00 | 10.11 | 12% | 92.1° |
| 2037-02-19 Thu | 66 | — | unknown | 03:05–05:40 (good, 2.58 h) | 87.1° 08:55 | 10.07 | 19% | 98.2° |
| 2037-02-20 Fri | 68 | — | unknown | 03:00–05:40 (good, 2.67 h) | 87.1° 08:55 | 10.03 | 27% | 104.0° |
| 2037-02-21 Sat | 68 | — | unknown | 02:55–05:35 (good, 2.67 h) | 87.1° 08:50 | 9.98 | 36% | 109.4° |
| 2037-02-22 Sun | 69 | — | unknown | 02:50–05:35 (good, 2.75 h) | 87.1° 08:45 | 9.94 | 46% | 114.2° |
| 2037-02-23 Mon | 71 | — | unknown | 02:45–05:35 (good, 2.83 h) | 87.1° 08:40 | 9.9 | 57% | 117.9° |
| 2037-02-24 Tue | 71 | — | unknown | 02:50–05:30 (good, 2.67 h) | 87.1° 08:35 | 9.86 | 68% | 120.1° |
| 2037-02-25 Wed | 71 | — | unknown | 02:45–05:30 (good, 2.75 h) | 87.1° 08:35 | 9.81 | 78% | 120.5° |
| 2037-02-26 Thu | 69 | — | unknown | 02:45–05:30 (good, 2.75 h) | 87.1° 08:30 | 9.77 | 86% | 118.9° |
| 2037-02-27 Fri | 59 | — | unknown | 02:45–05:25 (good, 2.67 h) | 87.1° 08:25 | 9.72 | 94% | 115.2° |
| 2037-02-28 Sat | 55 | — | unknown | 02:50–05:25 (good, 2.58 h) | 87.1° 08:20 | 9.68 | 98% | 109.7° |
| 2037-03-01 Sun | 49 | — | unknown | 02:55–05:25 (good, 2.5 h) | 87.1° 08:20 | 9.63 | 100% | 103.0° |
| 2037-03-02 Mon | 44 | — | unknown | 03:20–05:25 (good, 2.08 h) | 87.1° 08:15 | 9.59 | 99% | 95.6° |
| 2037-03-03 Tue | 40 | — | unknown | 03:45–05:20 (good, 1.58 h) | 87.1° 08:10 | 9.54 | 94% | 88.0° |
| 2037-03-04 Wed | 39 | — | unknown | 03:55–05:20 (good, 1.42 h) | 87.1° 08:05 | 9.49 | 88% | 80.6° |
| 2037-03-05 Thu | 40 | — | unknown | 03:35–05:20 (good, 1.75 h) | 87.1° 08:00 | 9.45 | 79% | 73.9° |
| 2037-03-06 Fri | 44 | — | unknown | 02:45–05:15 (good, 2.5 h) | 87.1° 08:00 | 9.4 | 69% | 68.2° |
| 2037-03-07 Sat | 49 | — | unknown | 02:25–05:15 (good, 2.83 h) | 87.1° 07:55 | 9.35 | 59% | 63.8° |
| 2037-03-08 Sun | 58 | — | unknown | 02:10–05:15 (good, 3.08 h) | 87.1° 07:50 | 9.3 | 49% | 60.9° |
| 2037-03-09 Mon | 67 | — | unknown | 01:50–05:10 (good, 3.33 h) | 87.1° 07:45 | 9.26 | 39% | 59.5° |
| 2037-03-10 Tue | 75 | — | unknown | 01:50–05:10 (good, 3.33 h) | 87.1° 07:40 | 9.21 | 29% | 59.8° |
| 2037-03-11 Wed | 84 | — | unknown | 01:45–05:10 (good, 3.42 h) | 87.1° 07:40 | 9.16 | 21% | 61.4° |
| 2037-03-12 Thu | 90 | — | unknown | 01:40–05:05 (good, 3.42 h) | 87.1° 07:35 | 9.11 | 14% | 64.4° |
| 2037-03-13 Fri | 91 | — | unknown | 01:35–05:05 (good, 3.5 h) | 87.1° 07:30 | 9.06 | 8% | 68.4° |
| 2037-03-14 Sat | 92 | — | unknown | 01:30–05:05 (good, 3.58 h) | 87.1° 07:25 | 9.01 | 4% | 73.3° |
| 2037-03-15 Sun | 93 | — | unknown | 01:30–05:00 (good, 3.5 h) | 87.1° 07:25 | 8.96 | 1% | 78.7° |
| 2037-03-16 Mon | 93 | — | unknown | 01:25–05:00 (good, 3.58 h) | 87.1° 07:20 | 8.91 | 0% | 84.5° |
| 2037-03-17 Tue | 94 | — | unknown | 01:20–04:55 (good, 3.58 h) | 87.1° 07:15 | 8.86 | 1% | 90.6° |
| 2037-03-18 Wed | 96 | — | unknown | 01:15–04:55 (good, 3.67 h) | 87.1° 07:10 | 8.81 | 4% | 96.6° |
| 2037-03-19 Thu | 97 | — | unknown | 01:15–04:55 (good, 3.67 h) | 87.1° 07:05 | 8.76 | 8% | 102.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-02-18&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.