← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-01-19 Tue | 0 | — | unknown | — | 71.1° 12:30 | 11.13 | 98% | 132.9° |
| 2038-01-20 Wed | 0 | — | unknown | — | 71.1° 12:25 | 11.11 | 100% | 136.0° |
| 2038-01-21 Thu | 0 | — | unknown | — | 71.1° 12:20 | 11.08 | 99% | 135.7° |
| 2038-01-22 Fri | 0 | — | unknown | — | 71.1° 12:15 | 11.05 | 96% | 131.9° |
| 2038-01-23 Sat | 0 | — | unknown | — | 71.1° 12:10 | 11.03 | 90% | 125.3° |
| 2038-01-24 Sun | 0 | — | unknown | — | 71.1° 12:10 | 11.0 | 82% | 116.8° |
| 2038-01-25 Mon | 0 | — | unknown | — | 71.1° 12:00 | 10.97 | 72% | 107.2° |
| 2038-01-26 Tue | 0 | — | unknown | — | 71.1° 12:00 | 10.94 | 61% | 97.1° |
| 2038-01-27 Wed | 0 | — | unknown | — | 71.1° 11:50 | 10.91 | 50% | 86.9° |
| 2038-01-28 Thu | 1 | — | unknown | — | 71.1° 11:50 | 10.88 | 39% | 77.0° |
| 2038-01-29 Fri | 1 | — | unknown | — | 71.1° 11:45 | 10.85 | 28% | 67.5° |
| 2038-01-30 Sat | 1 | — | unknown | — | 71.1° 11:40 | 10.82 | 19% | 59.0° |
| 2038-01-31 Sun | 1 | — | unknown | — | 71.1° 11:35 | 10.79 | 11% | 51.8° |
| 2038-02-01 Mon | 1 | — | unknown | — | 71.1° 11:35 | 10.75 | 6% | 46.6° |
| 2038-02-02 Tue | 1 | — | unknown | 06:25–06:30 (marginal, 0.08 h) | 71.1° 11:30 | 10.72 | 2% | 43.9° |
| 2038-02-03 Wed | 2 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 71.1° 11:25 | 10.69 | 0% | 44.2° |
| 2038-02-04 Thu | 3 | — | unknown | 06:20–06:30 (marginal, 0.17 h) | 71.1° 11:20 | 10.65 | 0% | 47.3° |
| 2038-02-05 Fri | 3 | — | unknown | 06:15–06:30 (marginal, 0.25 h) | 71.1° 11:15 | 10.62 | 3% | 52.4° |
| 2038-02-06 Sat | 3 | — | unknown | 06:10–06:25 (marginal, 0.25 h) | 71.1° 11:15 | 10.58 | 7% | 59.1° |
| 2038-02-07 Sun | 4 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.55 | 13% | 66.6° |
| 2038-02-08 Mon | 5 | — | unknown | 05:35–05:55 (marginal, 0.33 h) | 71.1° 11:05 | 10.51 | 20% | 74.6° |
| 2038-02-09 Tue | 5 | — | unknown | 06:00–06:25 (marginal, 0.42 h) | 71.1° 11:00 | 10.47 | 28% | 83.0° |
| 2038-02-10 Wed | 6 | — | unknown | 05:55–06:25 (marginal, 0.5 h) | 71.1° 10:55 | 10.44 | 36% | 91.5° |
| 2038-02-11 Thu | 6 | — | unknown | 05:25–06:20 (marginal, 0.92 h) | 71.1° 10:55 | 10.4 | 46% | 100.1° |
| 2038-02-12 Fri | 8 | — | unknown | 05:20–06:20 (marginal, 1.0 h) | 71.1° 10:50 | 10.36 | 55% | 108.6° |
| 2038-02-13 Sat | 8 | — | unknown | 05:15–06:20 (marginal, 1.08 h) | 71.1° 10:45 | 10.32 | 65% | 116.7° |
| 2038-02-14 Sun | 8 | — | unknown | 05:40–05:45 (good, 0.08 h) | 71.1° 10:40 | 10.28 | 74% | 124.3° |
| 2038-02-15 Mon | 9 | — | unknown | 05:35–05:45 (good, 0.17 h) | 71.1° 10:40 | 10.24 | 83% | 130.6° |
| 2038-02-16 Tue | 10 | — | unknown | 05:40–05:45 (good, 0.08 h) | 71.1° 10:35 | 10.2 | 90% | 135.0° |
| 2038-02-17 Wed | 9 | — | unknown | 05:35–05:40 (good, 0.08 h) | 71.1° 10:30 | 10.16 | 96% | 136.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-01-19&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.