← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-05-25 Mon | 0 | — | unknown | — | 79.2° 10:40 | 5.07 | 87% | 153.3° |
| 2037-05-26 Tue | 0 | — | unknown | — | 79.2° 10:35 | 5.02 | 93% | 155.4° |
| 2037-05-27 Wed | 0 | — | unknown | — | 79.1° 10:30 | 4.98 | 98% | 150.4° |
| 2037-05-28 Thu | 0 | — | unknown | — | 79.2° 10:30 | 4.94 | 100% | 141.1° |
| 2037-05-29 Fri | 0 | — | unknown | — | 79.2° 10:25 | 4.9 | 99% | 130.2° |
| 2037-05-30 Sat | 0 | — | unknown | — | 79.2° 10:20 | 4.86 | 96% | 118.7° |
| 2037-05-31 Sun | 1 | — | unknown | — | 79.2° 10:15 | 4.82 | 92% | 107.1° |
| 2037-06-01 Mon | 1 | — | unknown | — | 79.1° 10:15 | 4.78 | 85% | 95.7° |
| 2037-06-02 Tue | 1 | — | unknown | — | 79.2° 10:10 | 4.75 | 77% | 84.4° |
| 2037-06-03 Wed | 1 | — | unknown | — | 79.2° 10:05 | 4.72 | 69% | 73.4° |
| 2037-06-04 Thu | 1 | — | unknown | — | 79.2° 10:00 | 4.68 | 60% | 62.7° |
| 2037-06-05 Fri | 1 | — | unknown | — | 79.2° 09:55 | 4.65 | 50% | 52.4° |
| 2037-06-06 Sat | 1 | — | unknown | — | 79.1° 09:55 | 4.62 | 41% | 42.6° |
| 2037-06-07 Sun | 1 | — | unknown | — | 79.2° 09:50 | 4.6 | 32% | 33.8° |
| 2037-06-08 Mon | 2 | — | unknown | — | 79.2° 09:45 | 4.57 | 23% | 27.1° |
| 2037-06-09 Tue | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:40 | 4.55 | 15% | 24.5° |
| 2037-06-10 Wed | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:35 | 4.53 | 9% | 27.5° |
| 2037-06-11 Thu | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:35 | 4.51 | 4% | 35.0° |
| 2037-06-12 Fri | 4 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:30 | 4.49 | 1% | 45.0° |
| 2037-06-13 Sat | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:25 | 4.47 | 0% | 56.3° |
| 2037-06-14 Sun | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:20 | 4.46 | 2% | 68.5° |
| 2037-06-15 Mon | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:20 | 4.45 | 6% | 81.2° |
| 2037-06-16 Tue | 8 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.2° 09:15 | 4.44 | 13% | 94.0° |
| 2037-06-17 Wed | 9 | — | unknown | 03:15–04:30 (marginal, 1.25 h) | 79.2° 09:10 | 4.43 | 21% | 106.9° |
| 2037-06-18 Thu | 10 | — | unknown | 03:10–04:30 (marginal, 1.33 h) | 79.2° 09:05 | 4.43 | 32% | 119.6° |
| 2037-06-19 Fri | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 09:00 | 4.42 | 43% | 131.9° |
| 2037-06-20 Sat | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 09:00 | 4.42 | 54% | 143.0° |
| 2037-06-21 Sun | 14 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:55 | 4.42 | 65% | 151.7° |
| 2037-06-22 Mon | 15 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:50 | 4.43 | 76% | 155.4° |
| 2037-06-23 Tue | 16 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:45 | 4.43 | 85% | 152.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-05-25&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.