← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-06-21 Tue | 21 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.1° 19:55 | 4.42 | 0% | 93.1° |
| 2039-06-22 Wed | 19 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.1° 19:50 | 4.42 | 1% | 81.1° |
| 2039-06-23 Thu | 17 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.1° 19:45 | 4.43 | 4% | 69.0° |
| 2039-06-24 Fri | 16 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.1° 19:40 | 4.43 | 10% | 56.7° |
| 2039-06-25 Sat | 13 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.1° 19:35 | 4.44 | 16% | 44.3° |
| 2039-06-26 Sun | 10 | — | unknown | 22:20–23:55 (marginal, 1.58 h) | 50.1° 19:35 | 4.45 | 24% | 31.6° |
| 2039-06-27 Mon | 8 | — | unknown | 23:15–23:50 (marginal, 0.58 h) | 50.1° 19:30 | 4.47 | 34% | 18.7° |
| 2039-06-28 Tue | 6 | — | unknown | 23:15–23:45 (marginal, 0.5 h) | 50.1° 19:25 | 4.48 | 44% | 5.5° |
| 2039-06-29 Wed | 5 | — | unknown | 23:10–23:35 (marginal, 0.42 h) | 50.1° 19:20 | 4.5 | 55% | 8.1° |
| 2039-06-30 Thu | 3 | — | unknown | 23:10–23:25 (marginal, 0.25 h) | 50.1° 19:20 | 4.51 | 66% | 22.0° |
| 2039-07-01 Fri | 3 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.1° 19:15 | 4.53 | 77% | 36.3° |
| 2039-07-02 Sat | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.1° 19:10 | 4.56 | 86% | 50.9° |
| 2039-07-03 Sun | 2 | — | unknown | 23:10–23:15 (marginal, 0.08 h) | 50.1° 19:05 | 4.58 | 93% | 65.8° |
| 2039-07-04 Mon | 3 | — | unknown | 23:10–23:20 (marginal, 0.17 h) | 50.1° 19:00 | 4.61 | 98% | 80.9° |
| 2039-07-05 Tue | 3 | — | unknown | 23:10–23:20 (marginal, 0.17 h) | 50.1° 19:00 | 4.63 | 100% | 95.9° |
| 2039-07-06 Wed | 3 | — | unknown | 22:20–22:35 (marginal, 0.25 h) | 50.1° 18:55 | 4.66 | 99% | 110.8° |
| 2039-07-07 Thu | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:50 | 4.69 | 95% | 125.4° |
| 2039-07-08 Fri | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:45 | 4.73 | 89% | 139.6° |
| 2039-07-09 Sat | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:40 | 4.76 | 81% | 153.4° |
| 2039-07-10 Sun | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.1° 18:40 | 4.79 | 72% | 166.6° |
| 2039-07-11 Mon | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.83 | 62% | 179.4° |
| 2039-07-12 Tue | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:30 | 4.87 | 52% | 168.0° |
| 2039-07-13 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:25 | 4.91 | 42% | 155.7° |
| 2039-07-14 Thu | 2 | — | unknown | 22:10–22:15 (marginal, 0.08 h) | 50.1° 18:25 | 4.95 | 33% | 143.7° |
| 2039-07-15 Fri | 1 | — | unknown | — | 50.1° 18:20 | 4.99 | 24% | 131.8° |
| 2039-07-16 Sat | 1 | — | unknown | — | 50.1° 18:15 | 5.03 | 17% | 120.0° |
| 2039-07-17 Sun | 1 | — | unknown | — | 50.1° 18:10 | 5.08 | 10% | 108.2° |
| 2039-07-18 Mon | 1 | — | unknown | — | 50.1° 18:05 | 5.12 | 5% | 96.3° |
| 2039-07-19 Tue | 1 | — | unknown | — | 50.1° 18:05 | 5.17 | 2% | 84.3° |
| 2039-07-20 Wed | 1 | — | unknown | — | 50.1° 18:00 | 5.22 | 0% | 72.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-06-21&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.