← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-06-26 Thu | 0 | — | unknown | — | 72.5° 10:50 | 4.45 | 39% | 112.9° |
| 2031-06-27 Fri | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 49% | 125.5° |
| 2031-06-28 Sat | 0 | — | unknown | — | 72.5° 10:40 | 4.48 | 60% | 138.5° |
| 2031-06-29 Sun | 0 | — | unknown | — | 72.5° 10:35 | 4.5 | 70% | 151.8° |
| 2031-06-30 Mon | 0 | — | unknown | — | 72.5° 10:35 | 4.51 | 80% | 165.4° |
| 2031-07-01 Tue | 0 | — | unknown | — | 72.5° 10:30 | 4.53 | 88% | 175.7° |
| 2031-07-02 Wed | 0 | — | unknown | — | 72.5° 10:25 | 4.56 | 95% | 164.2° |
| 2031-07-03 Thu | 0 | — | unknown | — | 72.5° 10:20 | 4.58 | 99% | 149.5° |
| 2031-07-04 Fri | 0 | — | unknown | — | 72.5° 10:15 | 4.6 | 100% | 134.3° |
| 2031-07-05 Sat | 0 | — | unknown | — | 72.5° 10:15 | 4.63 | 98% | 119.1° |
| 2031-07-06 Sun | 0 | — | unknown | — | 72.5° 10:10 | 4.66 | 93% | 104.1° |
| 2031-07-07 Mon | 0 | — | unknown | — | 72.5° 10:05 | 4.69 | 86% | 89.4° |
| 2031-07-08 Tue | 0 | — | unknown | — | 72.5° 10:00 | 4.72 | 77% | 75.1° |
| 2031-07-09 Wed | 0 | — | unknown | — | 72.5° 09:55 | 4.76 | 66% | 61.3° |
| 2031-07-10 Thu | 1 | — | unknown | — | 72.5° 09:55 | 4.79 | 56% | 47.9° |
| 2031-07-11 Fri | 1 | — | unknown | — | 72.5° 09:50 | 4.83 | 45% | 35.0° |
| 2031-07-12 Sat | 1 | — | unknown | — | 72.5° 09:45 | 4.87 | 36% | 22.5° |
| 2031-07-13 Sun | 1 | — | unknown | — | 72.5° 09:40 | 4.91 | 26% | 10.7° |
| 2031-07-14 Mon | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:40 | 4.95 | 18% | 5.0° |
| 2031-07-15 Tue | 3 | — | unknown | 04:35–04:50 (marginal, 0.25 h) | 72.5° 09:35 | 4.99 | 12% | 15.0° |
| 2031-07-16 Wed | 4 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:30 | 5.03 | 6% | 26.6° |
| 2031-07-17 Thu | 4 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:25 | 5.08 | 2% | 38.3° |
| 2031-07-18 Fri | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 72.5° 09:20 | 5.12 | 0% | 50.1° |
| 2031-07-19 Sat | 7 | — | unknown | 04:10–04:50 (marginal, 0.67 h) | 72.5° 09:20 | 5.17 | 0% | 61.8° |
| 2031-07-20 Sun | 8 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.21 | 2% | 73.7° |
| 2031-07-21 Mon | 11 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.26 | 5% | 85.6° |
| 2031-07-22 Tue | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.31 | 10% | 97.7° |
| 2031-07-23 Wed | 13 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.36 | 17% | 109.9° |
| 2031-07-24 Thu | 16 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.5° 09:00 | 5.41 | 25% | 122.3° |
| 2031-07-25 Fri | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.5° 08:55 | 5.46 | 34% | 134.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-06-26&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.