← 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. |
|---|---|---|---|---|---|---|---|---|
| 2028-07-09 Sun | 1 | — | unknown | — | 72.5° 09:55 | 4.78 | 90% | 95.5° |
| 2028-07-10 Mon | 1 | — | unknown | — | 72.5° 09:50 | 4.82 | 84% | 83.6° |
| 2028-07-11 Tue | 1 | — | unknown | — | 72.5° 09:45 | 4.86 | 77% | 71.7° |
| 2028-07-12 Wed | 1 | — | unknown | — | 72.5° 09:40 | 4.9 | 68% | 59.9° |
| 2028-07-13 Thu | 1 | — | unknown | — | 72.5° 09:40 | 4.94 | 59% | 48.0° |
| 2028-07-14 Fri | 1 | — | unknown | — | 72.5° 09:35 | 4.98 | 49% | 36.0° |
| 2028-07-15 Sat | 2 | — | unknown | 03:55–04:00 (marginal, 0.08 h) | 72.5° 09:30 | 5.02 | 40% | 23.7° |
| 2028-07-16 Sun | 3 | — | unknown | 04:40–04:50 (marginal, 0.17 h) | 72.5° 09:25 | 5.06 | 30% | 11.2° |
| 2028-07-17 Mon | 4 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:25 | 5.11 | 21% | 1.7° |
| 2028-07-18 Tue | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:20 | 5.15 | 13% | 15.0° |
| 2028-07-19 Wed | 8 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.2 | 6% | 28.7° |
| 2028-07-20 Thu | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.25 | 2% | 42.9° |
| 2028-07-21 Fri | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.3 | 0% | 57.4° |
| 2028-07-22 Sat | 13 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:05 | 5.35 | 1% | 72.2° |
| 2028-07-23 Sun | 15 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.4 | 5% | 87.1° |
| 2028-07-24 Mon | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.5° 08:55 | 5.45 | 11% | 101.9° |
| 2028-07-25 Tue | 19 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.5° 08:50 | 5.5 | 20% | 116.6° |
| 2028-07-26 Wed | 21 | — | unknown | 03:40–04:15 (good, 0.58 h) | 72.5° 08:45 | 5.55 | 30% | 131.1° |
| 2028-07-27 Thu | 23 | — | unknown | 03:40–04:20 (good, 0.67 h) | 72.5° 08:45 | 5.6 | 41% | 145.3° |
| 2028-07-28 Fri | 25 | — | unknown | 03:35–04:20 (good, 0.75 h) | 72.5° 08:40 | 5.66 | 52% | 159.2° |
| 2028-07-29 Sat | 27 | — | unknown | 03:30–04:20 (good, 0.83 h) | 72.5° 08:35 | 5.71 | 63% | 172.8° |
| 2028-07-30 Sun | 28 | — | unknown | 03:25–04:25 (good, 1.0 h) | 72.5° 08:30 | 5.77 | 73% | 174.0° |
| 2028-07-31 Mon | 30 | — | unknown | 03:20–04:25 (good, 1.08 h) | 72.5° 08:30 | 5.82 | 82% | 161.0° |
| 2028-08-01 Tue | 32 | — | unknown | 03:20–04:25 (good, 1.08 h) | 72.5° 08:25 | 5.88 | 89% | 148.2° |
| 2028-08-02 Wed | 33 | — | unknown | 03:20–04:30 (good, 1.17 h) | 72.5° 08:20 | 5.93 | 94% | 135.6° |
| 2028-08-03 Thu | 30 | — | unknown | 03:20–04:30 (good, 1.17 h) | 72.5° 08:15 | 5.99 | 98% | 123.2° |
| 2028-08-04 Fri | 28 | — | unknown | 03:20–04:30 (good, 1.17 h) | 72.5° 08:10 | 6.04 | 100% | 111.0° |
| 2028-08-05 Sat | 25 | — | unknown | 03:25–04:35 (good, 1.17 h) | 72.5° 08:10 | 6.1 | 100% | 99.0° |
| 2028-08-06 Sun | 21 | — | unknown | 04:15–04:35 (good, 0.33 h) | 72.5° 08:05 | 6.16 | 98% | 87.0° |
| 2028-08-07 Mon | 17 | — | unknown | 02:40–04:35 (marginal, 1.92 h) | 72.5° 08:00 | 6.21 | 94% | 75.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2028-07-09&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.