← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-06-30 Wed | 0 | — | unknown | — | 72.5° 10:30 | 4.52 | 3% | 21.2° |
| 2038-07-01 Thu | 0 | — | unknown | — | 72.5° 10:30 | 4.54 | 0% | 33.3° |
| 2038-07-02 Fri | 0 | — | unknown | — | 72.5° 10:25 | 4.56 | 0% | 45.9° |
| 2038-07-03 Sat | 0 | — | unknown | — | 72.5° 10:20 | 4.59 | 2% | 58.8° |
| 2038-07-04 Sun | 0 | — | unknown | — | 72.5° 10:15 | 4.61 | 6% | 72.0° |
| 2038-07-05 Mon | 0 | — | unknown | — | 72.5° 10:10 | 4.64 | 13% | 85.4° |
| 2038-07-06 Tue | 0 | — | unknown | — | 72.5° 10:10 | 4.67 | 21% | 99.0° |
| 2038-07-07 Wed | 1 | — | unknown | — | 72.5° 10:05 | 4.7 | 31% | 112.8° |
| 2038-07-08 Thu | 1 | — | unknown | — | 72.5° 10:00 | 4.73 | 42% | 126.7° |
| 2038-07-09 Fri | 1 | — | unknown | — | 72.5° 09:55 | 4.77 | 53% | 140.6° |
| 2038-07-10 Sat | 1 | — | unknown | — | 72.5° 09:55 | 4.8 | 64% | 154.3° |
| 2038-07-11 Sun | 2 | — | unknown | — | 72.5° 09:50 | 4.84 | 75% | 167.3° |
| 2038-07-12 Mon | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:45 | 4.88 | 84% | 171.5° |
| 2038-07-13 Tue | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:40 | 4.92 | 92% | 160.3° |
| 2038-07-14 Wed | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:35 | 4.96 | 97% | 146.9° |
| 2038-07-15 Thu | 3 | — | unknown | 04:35–04:50 (marginal, 0.25 h) | 72.5° 09:35 | 5.0 | 100% | 133.2° |
| 2038-07-16 Fri | 3 | — | unknown | 04:35–04:50 (marginal, 0.25 h) | 72.5° 09:30 | 5.05 | 100% | 119.7° |
| 2038-07-17 Sat | 4 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:25 | 5.09 | 98% | 106.5° |
| 2038-07-18 Sun | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:20 | 5.14 | 93% | 93.5° |
| 2038-07-19 Mon | 4 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:15 | 5.18 | 87% | 80.9° |
| 2038-07-20 Tue | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 72.5° 09:15 | 5.23 | 80% | 68.6° |
| 2038-07-21 Wed | 4 | — | unknown | 03:45–04:10 (marginal, 0.42 h) | 72.5° 09:10 | 5.28 | 71% | 56.5° |
| 2038-07-22 Thu | 5 | — | unknown | 03:40–04:10 (marginal, 0.5 h) | 72.5° 09:05 | 5.33 | 62% | 44.7° |
| 2038-07-23 Fri | 6 | — | unknown | 03:35–04:10 (marginal, 0.58 h) | 72.5° 09:00 | 5.38 | 53% | 33.1° |
| 2038-07-24 Sat | 9 | — | unknown | 03:25–04:15 (marginal, 0.83 h) | 72.5° 09:00 | 5.43 | 43% | 21.8° |
| 2038-07-25 Sun | 12 | — | unknown | 04:10–04:15 (good, 0.08 h) | 72.5° 08:55 | 5.48 | 34% | 11.4° |
| 2038-07-26 Mon | 15 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 08:50 | 5.53 | 25% | 8.3° |
| 2038-07-27 Tue | 19 | — | unknown | 03:45–04:20 (good, 0.58 h) | 72.5° 08:45 | 5.58 | 17% | 17.3° |
| 2038-07-28 Wed | 22 | — | unknown | 03:40–04:20 (good, 0.67 h) | 72.5° 08:40 | 5.64 | 10% | 29.1° |
| 2038-07-29 Thu | 25 | — | unknown | 03:30–04:20 (good, 0.83 h) | 72.5° 08:40 | 5.69 | 5% | 41.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-06-30&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.