← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-05-28 Fri | 0 | — | unknown | — | 79.2° 10:30 | 4.95 | 22% | 32.5° |
| 2038-05-29 Sat | 0 | — | unknown | — | 79.2° 10:25 | 4.91 | 15% | 26.3° |
| 2038-05-30 Sun | 1 | — | unknown | — | 79.2° 10:20 | 4.87 | 9% | 24.2° |
| 2038-05-31 Mon | 1 | — | unknown | — | 79.2° 10:20 | 4.83 | 4% | 27.3° |
| 2038-06-01 Tue | 1 | — | unknown | — | 79.2° 10:15 | 4.79 | 1% | 34.3° |
| 2038-06-02 Wed | 1 | — | unknown | — | 79.2° 10:10 | 4.76 | 0% | 43.5° |
| 2038-06-03 Thu | 1 | — | unknown | — | 79.2° 10:05 | 4.72 | 1% | 53.8° |
| 2038-06-04 Fri | 1 | — | unknown | — | 79.2° 10:00 | 4.69 | 4% | 64.8° |
| 2038-06-05 Sat | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.2° 10:00 | 4.66 | 8% | 76.3° |
| 2038-06-06 Sun | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.2° 09:55 | 4.63 | 15% | 88.1° |
| 2038-06-07 Mon | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.2° 09:50 | 4.6 | 23% | 100.2° |
| 2038-06-08 Tue | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:45 | 4.58 | 33% | 112.3° |
| 2038-06-09 Wed | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.2° 09:40 | 4.55 | 44% | 124.4° |
| 2038-06-10 Thu | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.2° 09:40 | 4.53 | 55% | 136.1° |
| 2038-06-11 Fri | 3 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:35 | 4.51 | 66% | 146.7° |
| 2038-06-12 Sat | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:30 | 4.49 | 77% | 154.2° |
| 2038-06-13 Sun | 4 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:25 | 4.48 | 86% | 155.2° |
| 2038-06-14 Mon | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:20 | 4.46 | 93% | 148.9° |
| 2038-06-15 Tue | 6 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:20 | 4.45 | 98% | 138.5° |
| 2038-06-16 Wed | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:15 | 4.44 | 100% | 126.4° |
| 2038-06-17 Thu | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:10 | 4.43 | 99% | 113.8° |
| 2038-06-18 Fri | 6 | — | unknown | 03:10–03:40 (marginal, 0.5 h) | 79.2° 09:05 | 4.43 | 96% | 101.2° |
| 2038-06-19 Sat | 6 | — | unknown | 03:05–03:40 (marginal, 0.58 h) | 79.2° 09:05 | 4.42 | 90% | 88.8° |
| 2038-06-20 Sun | 6 | — | unknown | 03:05–03:40 (marginal, 0.58 h) | 79.2° 09:00 | 4.42 | 83% | 76.8° |
| 2038-06-21 Mon | 7 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.2° 08:55 | 4.42 | 74% | 65.3° |
| 2038-06-22 Tue | 8 | — | unknown | 02:55–03:40 (marginal, 0.75 h) | 79.2° 08:50 | 4.43 | 65% | 54.3° |
| 2038-06-23 Wed | 9 | — | unknown | 02:50–03:40 (marginal, 0.83 h) | 79.2° 08:45 | 4.43 | 56% | 44.1° |
| 2038-06-24 Thu | 11 | — | unknown | 02:45–04:30 (marginal, 1.75 h) | 79.2° 08:45 | 4.44 | 46% | 35.0° |
| 2038-06-25 Fri | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:40 | 4.45 | 37% | 27.9° |
| 2038-06-26 Sat | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.2° 08:35 | 4.46 | 28% | 24.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-05-28&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.