← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-07-13 Sun | 39 | — | unknown | 02:10–03:55 (good, 1.75 h) | 79.1° 07:30 | 4.91 | 26% | 24.7° |
| 2031-07-14 Mon | 47 | — | unknown | 02:00–04:00 (good, 2.0 h) | 79.1° 07:25 | 4.95 | 18% | 34.3° |
| 2031-07-15 Tue | 53 | — | unknown | 01:55–04:00 (good, 2.08 h) | 79.1° 07:20 | 4.99 | 12% | 44.8° |
| 2031-07-16 Wed | 58 | — | unknown | 01:50–04:00 (good, 2.17 h) | 79.1° 07:15 | 5.03 | 6% | 55.8° |
| 2031-07-17 Thu | 60 | — | unknown | 01:45–04:00 (good, 2.25 h) | 79.1° 07:15 | 5.08 | 2% | 66.9° |
| 2031-07-18 Fri | 63 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:10 | 5.12 | 0% | 78.2° |
| 2031-07-19 Sat | 65 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:05 | 5.17 | 0% | 89.5° |
| 2031-07-20 Sun | 68 | — | unknown | 01:35–04:05 (good, 2.5 h) | 79.1° 07:00 | 5.21 | 2% | 100.8° |
| 2031-07-21 Mon | 71 | — | unknown | 01:30–04:10 (good, 2.67 h) | 79.1° 07:00 | 5.26 | 5% | 112.2° |
| 2031-07-22 Tue | 73 | — | unknown | 01:25–04:10 (good, 2.75 h) | 79.1° 06:55 | 5.31 | 10% | 123.5° |
| 2031-07-23 Wed | 75 | — | unknown | 01:25–04:10 (good, 2.75 h) | 79.1° 06:50 | 5.36 | 17% | 134.8° |
| 2031-07-24 Thu | 79 | — | unknown | 01:20–04:15 (good, 2.92 h) | 79.1° 06:45 | 5.41 | 25% | 145.8° |
| 2031-07-25 Fri | 82 | — | unknown | 01:15–04:15 (good, 3.0 h) | 79.1° 06:40 | 5.46 | 34% | 155.7° |
| 2031-07-26 Sat | 84 | — | unknown | 01:10–04:15 (good, 3.08 h) | 79.1° 06:40 | 5.51 | 45% | 162.1° |
| 2031-07-27 Sun | 85 | — | unknown | 01:05–04:15 (good, 3.17 h) | 79.1° 06:35 | 5.57 | 55% | 160.4° |
| 2031-07-28 Mon | 89 | — | unknown | 01:10–04:20 (good, 3.17 h) | 79.1° 06:30 | 5.62 | 66% | 151.5° |
| 2031-07-29 Tue | 90 | — | unknown | 01:05–04:20 (good, 3.25 h) | 79.1° 06:25 | 5.67 | 77% | 139.6° |
| 2031-07-30 Wed | 89 | — | unknown | 01:05–04:20 (good, 3.25 h) | 79.1° 06:20 | 5.73 | 86% | 126.3° |
| 2031-07-31 Thu | 86 | — | unknown | 01:05–04:25 (good, 3.33 h) | 79.1° 06:20 | 5.78 | 93% | 112.3° |
| 2031-08-01 Fri | 64 | — | unknown | 01:10–04:25 (good, 3.25 h) | 79.1° 06:15 | 5.84 | 98% | 98.0° |
| 2031-08-02 Sat | 50 | — | unknown | 02:20–04:25 (good, 2.08 h) | 79.1° 06:10 | 5.89 | 100% | 83.5° |
| 2031-08-03 Sun | 37 | — | unknown | 04:05–04:30 (good, 0.42 h) | 79.1° 06:05 | 5.95 | 99% | 69.1° |
| 2031-08-04 Mon | 28 | — | unknown | 00:25–04:30 (marginal, 4.08 h) | 79.1° 06:05 | 6.0 | 95% | 55.2° |
| 2031-08-05 Tue | 22 | — | unknown | 00:25–04:30 (marginal, 4.08 h) | 79.1° 06:00 | 6.06 | 88% | 42.0° |
| 2031-08-06 Wed | 22 | — | unknown | 00:20–04:35 (marginal, 4.25 h) | 79.1° 05:55 | 6.12 | 80% | 30.0° |
| 2031-08-07 Thu | 30 | — | unknown | 00:05–04:35 (marginal, 4.5 h) | 79.1° 05:50 | 6.17 | 71% | 20.7° |
| 2031-08-08 Fri | 41 | — | unknown | 23:50–04:35 (marginal, 4.75 h) | 79.1° 05:45 | 6.23 | 61% | 17.6° |
| 2031-08-09 Sat | 56 | — | unknown | 00:40–04:40 (good, 4.0 h) | 79.1° 05:45 | 6.29 | 51% | 22.6° |
| 2031-08-10 Sun | 76 | — | unknown | 00:10–04:40 (good, 4.5 h) | 79.1° 05:40 | 6.34 | 41% | 31.7° |
| 2031-08-11 Mon | 86 | — | unknown | 00:10–04:40 (good, 4.5 h) | 79.1° 05:35 | 6.4 | 32% | 42.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-07-13&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.