← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-05-05 Mon | 2 | — | unknown | — | 89.6° 11:05 | 6.1 | 78% | 130.1° |
| 2036-05-06 Tue | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.5° 11:05 | 6.04 | 87% | 137.2° |
| 2036-05-07 Wed | 2 | — | unknown | — | 89.7° 11:00 | 5.99 | 93% | 141.4° |
| 2036-05-08 Thu | 2 | — | unknown | — | 89.8° 10:55 | 5.93 | 98% | 141.8° |
| 2036-05-09 Fri | 2 | — | unknown | — | 89.7° 10:50 | 5.87 | 100% | 138.4° |
| 2036-05-10 Sat | 3 | — | unknown | 04:10–04:15 (marginal, 0.08 h) | 89.6° 10:45 | 5.82 | 99% | 132.3° |
| 2036-05-11 Sun | 3 | — | unknown | 04:05–04:15 (marginal, 0.17 h) | 89.6° 10:45 | 5.76 | 97% | 124.5° |
| 2036-05-12 Mon | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.7° 10:40 | 5.71 | 93% | 115.7° |
| 2036-05-13 Tue | 3 | — | unknown | 04:00–04:10 (marginal, 0.17 h) | 89.8° 10:35 | 5.65 | 87% | 106.6° |
| 2036-05-14 Wed | 3 | — | unknown | 03:55–04:10 (marginal, 0.25 h) | 89.7° 10:30 | 5.6 | 80% | 97.2° |
| 2036-05-15 Thu | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.5° 10:25 | 5.55 | 72% | 87.8° |
| 2036-05-16 Fri | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.6° 10:25 | 5.49 | 63% | 78.5° |
| 2036-05-17 Sat | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.8° 10:20 | 5.44 | 54% | 69.4° |
| 2036-05-18 Sun | 5 | — | unknown | 03:40–04:00 (marginal, 0.33 h) | 89.7° 10:15 | 5.39 | 45% | 60.6° |
| 2036-05-19 Mon | 5 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.6° 10:10 | 5.34 | 35% | 52.5° |
| 2036-05-20 Tue | 7 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.5° 10:10 | 5.29 | 26% | 45.4° |
| 2036-05-21 Wed | 8 | — | unknown | 04:00–04:45 (marginal, 0.75 h) | 89.7° 10:05 | 5.24 | 18% | 40.2° |
| 2036-05-22 Thu | 9 | — | unknown | 03:25–04:45 (marginal, 1.33 h) | 89.8° 10:00 | 5.19 | 10% | 38.0° |
| 2036-05-23 Fri | 10 | — | unknown | 03:50–03:55 (good, 0.08 h) | 89.7° 09:55 | 5.15 | 5% | 39.6° |
| 2036-05-24 Sat | 11 | — | unknown | 03:50–03:55 (good, 0.08 h) | 89.6° 09:50 | 5.1 | 1% | 45.0° |
| 2036-05-25 Sun | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.6° 09:50 | 5.06 | 0% | 53.1° |
| 2036-05-26 Mon | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.7° 09:45 | 5.01 | 2% | 63.1° |
| 2036-05-27 Tue | 14 | — | unknown | 03:35–03:50 (good, 0.25 h) | 89.8° 09:40 | 4.97 | 6% | 74.0° |
| 2036-05-28 Wed | 15 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.7° 09:35 | 4.93 | 13% | 85.4° |
| 2036-05-29 Thu | 16 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.5° 09:30 | 4.89 | 22% | 96.9° |
| 2036-05-30 Fri | 17 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:30 | 4.85 | 33% | 108.1° |
| 2036-05-31 Sat | 18 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.8° 09:25 | 4.81 | 44% | 118.6° |
| 2036-06-01 Sun | 19 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.8° 09:20 | 4.78 | 55% | 128.0° |
| 2036-06-02 Mon | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.6° 09:15 | 4.74 | 66% | 135.6° |
| 2036-06-03 Tue | 22 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.5° 09:15 | 4.71 | 76% | 140.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-05-05&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.