← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-06-15 Tue | 10 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.1° 20:15 | 4.45 | 98% | 63.0° |
| 2038-06-16 Wed | 13 | — | unknown | 23:10–00:25 (marginal, 1.25 h) | 50.1° 20:10 | 4.44 | 100% | 77.6° |
| 2038-06-17 Thu | 17 | — | unknown | 23:10–23:35 (good, 0.42 h) | 50.1° 20:10 | 4.43 | 99% | 91.9° |
| 2038-06-18 Fri | 20 | — | unknown | 23:10–23:40 (good, 0.5 h) | 50.1° 20:05 | 4.43 | 96% | 105.9° |
| 2038-06-19 Sat | 23 | — | unknown | 23:10–23:45 (good, 0.58 h) | 50.1° 20:00 | 4.42 | 90% | 119.5° |
| 2038-06-20 Sun | 22 | — | unknown | 23:15–23:50 (good, 0.58 h) | 50.1° 19:55 | 4.42 | 83% | 132.7° |
| 2038-06-21 Mon | 20 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.1° 19:50 | 4.42 | 74% | 145.5° |
| 2038-06-22 Tue | 19 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.1° 19:50 | 4.43 | 65% | 157.9° |
| 2038-06-23 Wed | 17 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.1° 19:45 | 4.43 | 56% | 170.1° |
| 2038-06-24 Thu | 16 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.1° 19:40 | 4.44 | 46% | 177.9° |
| 2038-06-25 Fri | 14 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.1° 19:35 | 4.45 | 37% | 166.0° |
| 2038-06-26 Sat | 13 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.1° 19:30 | 4.46 | 28% | 154.2° |
| 2038-06-27 Sun | 12 | — | unknown | 23:15–23:20 (good, 0.08 h) | 50.1° 19:30 | 4.47 | 20% | 142.3° |
| 2038-06-28 Mon | 10 | — | unknown | 22:20–23:45 (marginal, 1.42 h) | 50.1° 19:25 | 4.48 | 13% | 130.3° |
| 2038-06-29 Tue | 10 | — | unknown | 22:20–23:40 (marginal, 1.33 h) | 50.1° 19:20 | 4.5 | 7% | 118.2° |
| 2038-06-30 Wed | 9 | — | unknown | 22:20–23:35 (marginal, 1.25 h) | 50.1° 19:15 | 4.52 | 3% | 105.8° |
| 2038-07-01 Thu | 8 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.1° 19:15 | 4.54 | 0% | 93.2° |
| 2038-07-02 Fri | 7 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.1° 19:10 | 4.56 | 0% | 80.3° |
| 2038-07-03 Sat | 6 | — | unknown | 22:20–22:55 (marginal, 0.58 h) | 50.1° 19:05 | 4.59 | 2% | 67.2° |
| 2038-07-04 Sun | 5 | — | unknown | 22:20–22:55 (marginal, 0.58 h) | 50.1° 19:00 | 4.61 | 6% | 53.9° |
| 2038-07-05 Mon | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 18:55 | 4.64 | 13% | 40.3° |
| 2038-07-06 Tue | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:55 | 4.67 | 21% | 26.6° |
| 2038-07-07 Wed | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:50 | 4.7 | 31% | 12.7° |
| 2038-07-08 Thu | 2 | — | unknown | — | 50.1° 18:45 | 4.73 | 42% | 1.4° |
| 2038-07-09 Fri | 1 | — | unknown | — | 50.1° 18:40 | 4.77 | 53% | 15.5° |
| 2038-07-10 Sat | 1 | — | unknown | — | 50.1° 18:35 | 4.8 | 64% | 29.7° |
| 2038-07-11 Sun | 1 | — | unknown | — | 50.1° 18:35 | 4.84 | 75% | 44.0° |
| 2038-07-12 Mon | 1 | — | unknown | — | 50.1° 18:30 | 4.88 | 84% | 58.3° |
| 2038-07-13 Tue | 1 | — | unknown | — | 50.1° 18:25 | 4.92 | 92% | 72.5° |
| 2038-07-14 Wed | 1 | — | unknown | — | 50.1° 18:20 | 4.96 | 97% | 86.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-06-15&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.