← 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. |
|---|---|---|---|---|---|---|---|---|
| 2045-07-02 Sun | 0 | — | unknown | — | 72.6° 10:25 | 4.57 | 88% | 98.5° |
| 2045-07-03 Mon | 0 | — | unknown | — | 72.6° 10:20 | 4.59 | 82% | 86.7° |
| 2045-07-04 Tue | 0 | — | unknown | — | 72.6° 10:15 | 4.62 | 74% | 74.8° |
| 2045-07-05 Wed | 0 | — | unknown | — | 72.6° 10:10 | 4.65 | 65% | 62.8° |
| 2045-07-06 Thu | 0 | — | unknown | — | 72.6° 10:10 | 4.68 | 55% | 50.6° |
| 2045-07-07 Fri | 0 | — | unknown | — | 72.6° 10:05 | 4.71 | 45% | 38.2° |
| 2045-07-08 Sat | 0 | — | unknown | — | 72.6° 10:00 | 4.74 | 35% | 25.4° |
| 2045-07-09 Sun | 1 | — | unknown | — | 72.6° 09:55 | 4.78 | 26% | 12.2° |
| 2045-07-10 Mon | 1 | — | unknown | — | 72.6° 09:50 | 4.81 | 17% | 1.8° |
| 2045-07-11 Tue | 1 | — | unknown | — | 72.6° 09:50 | 4.85 | 9% | 15.6° |
| 2045-07-12 Wed | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.6° 09:45 | 4.89 | 3% | 30.1° |
| 2045-07-13 Thu | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.6° 09:40 | 4.93 | 0% | 45.0° |
| 2045-07-14 Fri | 3 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.6° 09:35 | 4.97 | 0% | 60.1° |
| 2045-07-15 Sat | 3 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.6° 09:30 | 5.02 | 3% | 75.2° |
| 2045-07-16 Sun | 4 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.6° 09:30 | 5.06 | 9% | 90.3° |
| 2045-07-17 Mon | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.6° 09:25 | 5.1 | 17% | 105.1° |
| 2045-07-18 Tue | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 72.6° 09:20 | 5.15 | 27% | 119.5° |
| 2045-07-19 Wed | 7 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.6° 09:15 | 5.2 | 38% | 133.5° |
| 2045-07-20 Thu | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.6° 09:10 | 5.24 | 48% | 147.2° |
| 2045-07-21 Fri | 11 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.6° 09:10 | 5.29 | 59% | 160.4° |
| 2045-07-22 Sat | 12 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.6° 09:05 | 5.34 | 69% | 173.3° |
| 2045-07-23 Sun | 14 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.6° 09:00 | 5.39 | 78% | 173.9° |
| 2045-07-24 Mon | 17 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.6° 08:55 | 5.44 | 86% | 161.6° |
| 2045-07-25 Tue | 19 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.6° 08:55 | 5.49 | 92% | 149.4° |
| 2045-07-26 Wed | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.6° 08:50 | 5.55 | 96% | 137.3° |
| 2045-07-27 Thu | 19 | — | unknown | 03:50–04:20 (good, 0.5 h) | 72.6° 08:45 | 5.6 | 99% | 125.3° |
| 2045-07-28 Fri | 18 | — | unknown | 03:50–04:20 (good, 0.5 h) | 72.6° 08:40 | 5.65 | 100% | 113.4° |
| 2045-07-29 Sat | 16 | — | unknown | 03:55–04:20 (good, 0.42 h) | 72.6° 08:35 | 5.71 | 99% | 101.6° |
| 2045-07-30 Sun | 14 | — | unknown | 04:20–04:25 (good, 0.08 h) | 72.6° 08:35 | 5.76 | 96% | 89.8° |
| 2045-07-31 Mon | 13 | — | unknown | 03:05–04:25 (marginal, 1.33 h) | 72.6° 08:30 | 5.81 | 92% | 77.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2045-07-02&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.