← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-05-16 Thu | 4 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 89.7° 10:25 | 5.52 | 100% | 143.6° |
| 2030-05-17 Fri | 5 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 89.6° 10:20 | 5.47 | 100% | 133.6° |
| 2030-05-18 Sat | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.5° 10:15 | 5.42 | 97% | 121.7° |
| 2030-05-19 Sun | 5 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.6° 10:15 | 5.37 | 91% | 109.1° |
| 2030-05-20 Mon | 5 | — | unknown | 03:35–04:00 (marginal, 0.42 h) | 89.7° 10:10 | 5.32 | 83% | 96.5° |
| 2030-05-21 Tue | 5 | — | unknown | 03:30–04:00 (marginal, 0.5 h) | 89.7° 10:05 | 5.27 | 74% | 84.1° |
| 2030-05-22 Wed | 5 | — | unknown | 03:25–03:55 (marginal, 0.5 h) | 89.6° 10:00 | 5.22 | 64% | 72.2° |
| 2030-05-23 Thu | 6 | — | unknown | 03:20–03:55 (marginal, 0.58 h) | 89.5° 10:00 | 5.17 | 53% | 61.0° |
| 2030-05-24 Fri | 7 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.7° 09:55 | 5.13 | 43% | 50.7° |
| 2030-05-25 Sat | 8 | — | unknown | 03:15–03:55 (marginal, 0.67 h) | 89.7° 09:50 | 5.08 | 33% | 41.5° |
| 2030-05-26 Sun | 10 | — | unknown | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:45 | 5.04 | 24% | 34.2° |
| 2030-05-27 Mon | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.5° 09:40 | 4.99 | 16% | 30.0° |
| 2030-05-28 Tue | 15 | — | unknown | 03:35–03:50 (good, 0.25 h) | 89.6° 09:40 | 4.95 | 10% | 29.8° |
| 2030-05-29 Wed | 16 | — | unknown | 03:30–03:50 (good, 0.33 h) | 89.7° 09:35 | 4.91 | 5% | 33.7° |
| 2030-05-30 Thu | 16 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.7° 09:30 | 4.87 | 2% | 40.5° |
| 2030-05-31 Fri | 17 | — | unknown | 03:25–03:45 (good, 0.33 h) | 89.6° 09:25 | 4.83 | 0% | 48.9° |
| 2030-06-01 Sat | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 89.5° 09:20 | 4.79 | 0% | 58.3° |
| 2030-06-02 Sun | 21 | — | unknown | 03:15–03:45 (good, 0.5 h) | 89.6° 09:20 | 4.76 | 2% | 68.2° |
| 2030-06-03 Mon | 22 | — | unknown | 03:10–03:45 (good, 0.58 h) | 89.7° 09:15 | 4.73 | 6% | 78.6° |
| 2030-06-04 Tue | 23 | — | unknown | 03:05–03:45 (good, 0.67 h) | 89.7° 09:10 | 4.69 | 12% | 89.1° |
| 2030-06-05 Wed | 24 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.6° 09:05 | 4.66 | 19% | 99.8° |
| 2030-06-06 Thu | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 89.5° 09:05 | 4.63 | 28% | 110.6° |
| 2030-06-07 Fri | 26 | — | unknown | 02:55–03:40 (good, 0.75 h) | 89.7° 09:00 | 4.61 | 37% | 121.3° |
| 2030-06-08 Sat | 27 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.7° 08:55 | 4.58 | 48% | 131.7° |
| 2030-06-09 Sun | 28 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.7° 08:50 | 4.56 | 58% | 141.1° |
| 2030-06-10 Mon | 30 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.5° 08:45 | 4.53 | 69% | 148.2° |
| 2030-06-11 Tue | 31 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.6° 08:45 | 4.51 | 79% | 150.7° |
| 2030-06-12 Wed | 31 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.7° 08:40 | 4.5 | 88% | 146.9° |
| 2030-06-13 Thu | 29 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:35 | 4.48 | 95% | 138.4° |
| 2030-06-14 Fri | 29 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:30 | 4.46 | 99% | 127.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-05-16&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.