← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-08-05 Tue | 0 | 0 | 0 | — | 42.9° 09:55 | 6.08 | 88% | 145.0° |
| 2025-08-06 Wed | 0 | 0 | 0 | — | 42.9° 09:55 | 6.14 | 94% | 140.3° |
| 2025-08-07 Thu | 0 | 0 | 0 | — | 42.9° 09:50 | 6.2 | 98% | 132.8° |
| 2025-08-08 Fri | 0 | 0 | 0 | — | 42.9° 09:45 | 6.25 | 100% | 123.5° |
| 2025-08-09 Sat | 0 | 0 | 0 | — | 42.9° 09:40 | 6.31 | 100% | 113.0° |
| 2025-08-10 Sun | 0 | 100 | 0 | — | 42.9° 09:40 | 6.37 | 97% | 101.9° |
| 2025-08-11 Mon | 0 | 100 | 0 | — | 42.9° 09:35 | 6.43 | 92% | 90.3° |
| 2025-08-12 Tue | 0 | 100 | 0 | — | 42.9° 09:30 | 6.48 | 84% | 78.6° |
| 2025-08-13 Wed | 0 | 100 | 0 | — | 42.9° 09:25 | 6.54 | 75% | 67.1° |
| 2025-08-14 Thu | 0 | 0 | 0 | — | 42.9° 09:20 | 6.6 | 65% | 56.1° |
| 2025-08-15 Fri | 0 | 100 | 0 | — | 42.9° 09:20 | 6.66 | 53% | 46.2° |
| 2025-08-16 Sat | 0 | 95 | 0 | — | 42.9° 09:15 | 6.71 | 42% | 38.5° |
| 2025-08-17 Sun | 0 | 84 | 0 | — | 42.9° 09:10 | 6.77 | 31% | 34.3° |
| 2025-08-18 Mon | 0 | 5 | 0 | — | 42.9° 09:05 | 6.83 | 21% | 34.9° |
| 2025-08-19 Tue | 1 | 0 | 0 | — | 42.9° 09:00 | 6.89 | 13% | 39.9° |
| 2025-08-20 Wed | 1 | 100 | 1 | — | 42.9° 09:00 | 6.94 | 6% | 47.9° |
| 2025-08-21 Thu | 1 | 100 | 1 | — | 42.9° 08:55 | 7.0 | 2% | 57.5° |
| 2025-08-22 Fri | 1 | 100 | 1 | — | 42.9° 08:50 | 7.06 | 0% | 67.8° |
| 2025-08-23 Sat | 2 | 100 | 2 | 05:30–05:35 (marginal, 0.08 h) | 42.9° 08:45 | 7.12 | 0% | 78.3° |
| 2025-08-24 Sun | 3 | 76 | 2 | 04:55–05:00 (marginal, 0.08 h) | 42.9° 08:45 | 7.17 | 3% | 88.8° |
| 2025-08-25 Mon | 4 | 99 | 4 | 05:25–05:40 (marginal, 0.25 h) | 42.9° 08:40 | 7.23 | 7% | 99.2° |
| 2025-08-26 Tue | 4 | 100 | 4 | 04:50–05:05 (marginal, 0.25 h) | 42.9° 08:35 | 7.29 | 13% | 109.1° |
| 2025-08-27 Wed | 5 | 100 | 5 | 04:45–05:05 (marginal, 0.33 h) | 42.9° 08:30 | 7.34 | 20% | 118.7° |
| 2025-08-28 Thu | 7 | 100 | 7 | 04:40–05:05 (marginal, 0.42 h) | 42.9° 08:25 | 7.4 | 28% | 127.5° |
| 2025-08-29 Fri | 8 | 100 | 8 | 04:40–05:45 (marginal, 1.08 h) | 42.9° 08:25 | 7.46 | 37% | 135.4° |
| 2025-08-30 Sat | 9 | 0 | 0 | — | 42.9° 08:20 | 7.51 | 47% | 141.6° |
| 2025-08-31 Sun | 10 | 100 | 10 | 05:00–05:10 (good, 0.17 h) | 42.9° 08:15 | 7.57 | 56% | 145.4° |
| 2025-09-01 Mon | 12 | 100 | 12 | 04:55–05:10 (good, 0.25 h) | 42.9° 08:10 | 7.62 | 66% | 145.7° |
| 2025-09-02 Tue | 15 | 100 | 15 | 04:55–05:15 (good, 0.33 h) | 42.9° 08:05 | 7.68 | 75% | 142.4° |
| 2025-09-03 Wed | 16 | 48 | 8 | 04:30–05:00 (marginal, 0.5 h) | 42.9° 08:05 | 7.74 | 83% | 135.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-08-05&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.