← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-07-22 Tue | 12 | 99 | 12 | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.33 | 5% | 36.1° |
| 2025-07-23 Wed | 15 | 100 | 15 | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.38 | 1% | 50.2° |
| 2025-07-24 Thu | 17 | 100 | 17 | 03:50–04:15 (good, 0.42 h) | 72.5° 08:55 | 5.43 | 0% | 64.1° |
| 2025-07-25 Fri | 19 | 100 | 19 | 03:45–04:15 (good, 0.5 h) | 72.5° 08:50 | 5.48 | 2% | 77.7° |
| 2025-07-26 Sat | 20 | 100 | 20 | 03:45–04:15 (good, 0.5 h) | 72.5° 08:50 | 5.54 | 5% | 91.0° |
| 2025-07-27 Sun | 23 | 92 | 21 | 03:55–04:20 (good, 0.42 h) | 72.5° 08:45 | 5.59 | 11% | 103.9° |
| 2025-07-28 Mon | 25 | 99 | 25 | 03:35–04:20 (good, 0.75 h) | 72.5° 08:40 | 5.64 | 18% | 116.5° |
| 2025-07-29 Tue | 26 | 99 | 26 | 03:30–04:20 (good, 0.83 h) | 72.5° 08:35 | 5.7 | 26% | 128.8° |
| 2025-07-30 Wed | 28 | 0 | 0 | — | 72.5° 08:35 | 5.75 | 35% | 140.9° |
| 2025-07-31 Thu | 30 | 33 | 10 | 04:00–04:25 (marginal, 0.42 h) | 72.5° 08:30 | 5.81 | 44% | 152.8° |
| 2025-08-01 Fri | 32 | 87 | 28 | 03:35–04:25 (good, 0.83 h) | 72.5° 08:25 | 5.86 | 54% | 164.6° |
| 2025-08-02 Sat | 33 | 100 | 33 | 03:15–04:25 (good, 1.17 h) | 72.5° 08:20 | 5.92 | 63% | 176.4° |
| 2025-08-03 Sun | 35 | 97 | 34 | 03:10–04:30 (good, 1.33 h) | 72.5° 08:15 | 5.97 | 72% | 171.5° |
| 2025-08-04 Mon | 38 | 52 | 20 | 03:15–04:00 (good, 0.75 h) | 72.5° 08:15 | 6.03 | 80% | 159.4° |
| 2025-08-05 Tue | 39 | 64 | 25 | 04:00–04:30 (good, 0.5 h) | 72.5° 08:10 | 6.08 | 88% | 147.1° |
| 2025-08-06 Wed | 41 | 77 | 32 | 03:30–04:35 (good, 1.08 h) | 72.5° 08:05 | 6.14 | 94% | 134.4° |
| 2025-08-07 Thu | 37 | 70 | 26 | 04:00–04:35 (good, 0.58 h) | 72.5° 08:00 | 6.2 | 98% | 121.5° |
| 2025-08-08 Fri | 33 | 100 | 33 | 03:10–04:35 (good, 1.42 h) | 72.5° 07:55 | 6.25 | 100% | 108.2° |
| 2025-08-09 Sat | 28 | 100 | 28 | 03:20–04:40 (good, 1.33 h) | 72.5° 07:55 | 6.31 | 100% | 94.7° |
| 2025-08-10 Sun | 23 | 100 | 23 | 04:30–04:40 (good, 0.17 h) | 72.5° 07:50 | 6.37 | 97% | 80.9° |
| 2025-08-11 Mon | 18 | 100 | 18 | 02:30–04:40 (marginal, 2.17 h) | 72.5° 07:45 | 6.43 | 92% | 66.9° |
| 2025-08-12 Tue | 15 | 100 | 15 | 02:30–04:45 (marginal, 2.25 h) | 72.5° 07:40 | 6.48 | 84% | 52.8° |
| 2025-08-13 Wed | 14 | 100 | 14 | 02:25–04:45 (marginal, 2.33 h) | 72.5° 07:40 | 6.54 | 75% | 38.6° |
| 2025-08-14 Thu | 17 | 59 | 10 | 02:15–04:00 (marginal, 1.75 h) | 72.5° 07:35 | 6.6 | 65% | 24.3° |
| 2025-08-15 Fri | 24 | 100 | 24 | 02:00–04:50 (marginal, 2.83 h) | 72.5° 07:30 | 6.66 | 53% | 10.2° |
| 2025-08-16 Sat | 34 | 97 | 33 | 03:40–04:50 (good, 1.17 h) | 72.5° 07:25 | 6.71 | 42% | 4.1° |
| 2025-08-17 Sun | 44 | 94 | 41 | 02:35–04:50 (good, 2.25 h) | 72.5° 07:20 | 6.77 | 31% | 18.1° |
| 2025-08-18 Mon | 54 | 26 | 14 | 01:50–02:00 (marginal, 0.17 h) | 72.5° 07:20 | 6.83 | 21% | 32.1° |
| 2025-08-19 Tue | 66 | 0 | 0 | — | 72.5° 07:15 | 6.89 | 13% | 45.9° |
| 2025-08-20 Wed | 74 | 100 | 74 | 02:05–04:55 (good, 2.83 h) | 72.5° 07:10 | 6.94 | 6% | 59.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-07-22&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.