← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-07-09 Mon | 1 | — | unknown | — | 72.5° 09:55 | 4.79 | 0% | 54.4° |
| 2040-07-10 Tue | 1 | — | unknown | — | 72.5° 09:50 | 4.82 | 2% | 66.1° |
| 2040-07-11 Wed | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:45 | 4.86 | 6% | 78.0° |
| 2040-07-12 Thu | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:45 | 4.9 | 11% | 89.9° |
| 2040-07-13 Fri | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:40 | 4.94 | 18% | 101.9° |
| 2040-07-14 Sat | 3 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:35 | 4.98 | 26% | 114.1° |
| 2040-07-15 Sun | 3 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:30 | 5.02 | 35% | 126.5° |
| 2040-07-16 Mon | 4 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:25 | 5.07 | 45% | 139.1° |
| 2040-07-17 Tue | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 72.5° 09:25 | 5.11 | 56% | 152.1° |
| 2040-07-18 Wed | 7 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 72.5° 09:20 | 5.16 | 66% | 165.3° |
| 2040-07-19 Thu | 8 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.21 | 77% | 175.7° |
| 2040-07-20 Fri | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.25 | 86% | 165.1° |
| 2040-07-21 Sat | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.3 | 93% | 150.6° |
| 2040-07-22 Sun | 11 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:05 | 5.35 | 98% | 135.6° |
| 2040-07-23 Mon | 12 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:00 | 5.4 | 100% | 120.4° |
| 2040-07-24 Tue | 12 | — | unknown | 04:10–04:15 (good, 0.08 h) | 72.5° 08:55 | 5.45 | 99% | 105.3° |
| 2040-07-25 Wed | 10 | — | unknown | 03:20–04:15 (marginal, 0.92 h) | 72.5° 08:50 | 5.5 | 95% | 90.3° |
| 2040-07-26 Thu | 9 | — | unknown | 03:20–04:15 (marginal, 0.92 h) | 72.5° 08:50 | 5.56 | 88% | 75.6° |
| 2040-07-27 Fri | 9 | — | unknown | 03:20–04:20 (marginal, 1.0 h) | 72.5° 08:45 | 5.61 | 80% | 61.4° |
| 2040-07-28 Sat | 9 | — | unknown | 03:20–04:20 (marginal, 1.0 h) | 72.5° 08:40 | 5.66 | 70% | 47.6° |
| 2040-07-29 Sun | 10 | — | unknown | 03:10–04:20 (marginal, 1.17 h) | 72.5° 08:35 | 5.72 | 60% | 34.4° |
| 2040-07-30 Mon | 13 | — | unknown | 03:00–04:25 (marginal, 1.42 h) | 72.5° 08:30 | 5.77 | 49% | 21.6° |
| 2040-07-31 Tue | 17 | — | unknown | 03:45–04:25 (good, 0.67 h) | 72.5° 08:30 | 5.83 | 39% | 9.6° |
| 2040-08-01 Wed | 22 | — | unknown | 03:35–04:25 (good, 0.83 h) | 72.5° 08:25 | 5.88 | 30% | 5.6° |
| 2040-08-02 Thu | 27 | — | unknown | 03:25–04:30 (good, 1.08 h) | 72.5° 08:20 | 5.94 | 22% | 16.3° |
| 2040-08-03 Fri | 31 | — | unknown | 03:15–04:30 (good, 1.25 h) | 72.5° 08:15 | 5.99 | 14% | 28.0° |
| 2040-08-04 Sat | 36 | — | unknown | 03:05–04:30 (good, 1.42 h) | 72.5° 08:10 | 6.05 | 8% | 39.7° |
| 2040-08-05 Sun | 40 | — | unknown | 03:05–04:35 (good, 1.5 h) | 72.5° 08:10 | 6.1 | 4% | 51.4° |
| 2040-08-06 Mon | 43 | — | unknown | 03:00–04:35 (good, 1.58 h) | 72.5° 08:05 | 6.16 | 1% | 63.2° |
| 2040-08-07 Tue | 44 | — | unknown | 02:55–04:35 (good, 1.67 h) | 72.5° 08:00 | 6.22 | 0% | 75.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-07-09&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.