← 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. |
|---|---|---|---|---|---|---|---|---|
| 2044-06-27 Mon | 0 | — | unknown | — | 72.6° 10:40 | 4.48 | 9% | 72.4° |
| 2044-06-28 Tue | 0 | — | unknown | — | 72.6° 10:40 | 4.49 | 17% | 86.9° |
| 2044-06-29 Wed | 0 | — | unknown | — | 72.6° 10:35 | 4.51 | 26% | 101.0° |
| 2044-06-30 Thu | 0 | — | unknown | — | 72.6° 10:30 | 4.53 | 37% | 114.6° |
| 2044-07-01 Fri | 0 | — | unknown | — | 72.6° 10:25 | 4.55 | 47% | 127.8° |
| 2044-07-02 Sat | 0 | — | unknown | — | 72.5° 10:20 | 4.58 | 57% | 140.6° |
| 2044-07-03 Sun | 0 | — | unknown | — | 72.6° 10:20 | 4.6 | 67% | 153.1° |
| 2044-07-04 Mon | 0 | — | unknown | — | 72.6° 10:15 | 4.63 | 76% | 165.3° |
| 2044-07-05 Tue | 0 | — | unknown | — | 72.6° 10:10 | 4.66 | 84% | 177.3° |
| 2044-07-06 Wed | 0 | — | unknown | — | 72.6° 10:05 | 4.69 | 90% | 170.7° |
| 2044-07-07 Thu | 1 | — | unknown | — | 72.5° 10:05 | 4.72 | 95% | 158.8° |
| 2044-07-08 Fri | 1 | — | unknown | — | 72.6° 10:00 | 4.75 | 98% | 147.0° |
| 2044-07-09 Sat | 1 | — | unknown | — | 72.6° 09:55 | 4.79 | 100% | 135.2° |
| 2044-07-10 Sun | 1 | — | unknown | — | 72.6° 09:50 | 4.82 | 100% | 123.3° |
| 2044-07-11 Mon | 1 | — | unknown | — | 72.6° 09:45 | 4.86 | 97% | 111.3° |
| 2044-07-12 Tue | 1 | — | unknown | — | 72.6° 09:45 | 4.9 | 94% | 99.3° |
| 2044-07-13 Wed | 1 | — | unknown | — | 72.6° 09:40 | 4.94 | 88% | 87.0° |
| 2044-07-14 Thu | 1 | — | unknown | — | 72.6° 09:35 | 4.98 | 81% | 74.6° |
| 2044-07-15 Fri | 1 | — | unknown | — | 72.6° 09:30 | 5.03 | 72% | 62.0° |
| 2044-07-16 Sat | 2 | — | unknown | — | 72.6° 09:25 | 5.07 | 62% | 49.2° |
| 2044-07-17 Sun | 2 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.6° 09:25 | 5.11 | 52% | 36.0° |
| 2044-07-18 Mon | 4 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 72.6° 09:20 | 5.16 | 41% | 22.4° |
| 2044-07-19 Tue | 5 | — | unknown | 03:40–04:05 (marginal, 0.42 h) | 72.6° 09:15 | 5.21 | 30% | 8.5° |
| 2044-07-20 Wed | 8 | — | unknown | 03:40–04:10 (marginal, 0.5 h) | 72.6° 09:10 | 5.26 | 20% | 6.0° |
| 2044-07-21 Thu | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.3 | 12% | 20.7° |
| 2044-07-22 Fri | 12 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.6° 09:05 | 5.35 | 5% | 35.7° |
| 2044-07-23 Sat | 15 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.6° 09:00 | 5.4 | 1% | 50.8° |
| 2044-07-24 Sun | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.6° 08:55 | 5.45 | 0% | 65.9° |
| 2044-07-25 Mon | 19 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.6° 08:50 | 5.51 | 2% | 80.8° |
| 2044-07-26 Tue | 21 | — | unknown | 03:40–04:15 (good, 0.58 h) | 72.6° 08:50 | 5.56 | 7% | 95.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-06-27&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.