← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-05-03 Fri | 1 | — | unknown | — | 89.6° 11:15 | 6.25 | 2% | 42.5° |
| 2030-05-04 Sat | 1 | — | unknown | — | 89.5° 11:10 | 6.19 | 5% | 51.2° |
| 2030-05-05 Sun | 2 | — | unknown | — | 89.6° 11:10 | 6.13 | 10% | 60.7° |
| 2030-05-06 Mon | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.7° 11:05 | 6.07 | 16% | 70.7° |
| 2030-05-07 Tue | 2 | — | unknown | 04:55–05:05 (marginal, 0.17 h) | 89.7° 11:00 | 6.02 | 24% | 81.1° |
| 2030-05-08 Wed | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.6° 10:55 | 5.96 | 32% | 91.7° |
| 2030-05-09 Thu | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.5° 10:55 | 5.9 | 42% | 102.5° |
| 2030-05-10 Fri | 3 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.7° 10:50 | 5.85 | 52% | 113.4° |
| 2030-05-11 Sat | 3 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.7° 10:45 | 5.79 | 63% | 124.3° |
| 2030-05-12 Sun | 3 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.7° 10:40 | 5.74 | 73% | 134.7° |
| 2030-05-13 Mon | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.5° 10:35 | 5.68 | 82% | 143.9° |
| 2030-05-14 Tue | 4 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.6° 10:35 | 5.63 | 90% | 149.8° |
| 2030-05-15 Wed | 4 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 89.7° 10:30 | 5.58 | 96% | 149.8° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-05-03&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.