← 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. |
|---|---|---|---|---|---|---|---|---|
| 2039-07-08 Fri | 0 | — | unknown | — | 72.5° 10:00 | 4.73 | 89% | 94.7° |
| 2039-07-09 Sat | 0 | — | unknown | — | 72.5° 10:00 | 4.76 | 81% | 81.1° |
| 2039-07-10 Sun | 1 | — | unknown | — | 72.5° 09:55 | 4.79 | 72% | 67.8° |
| 2039-07-11 Mon | 1 | — | unknown | — | 72.5° 09:50 | 4.83 | 62% | 55.1° |
| 2039-07-12 Tue | 1 | — | unknown | — | 72.5° 09:45 | 4.87 | 52% | 42.7° |
| 2039-07-13 Wed | 1 | — | unknown | — | 72.5° 09:40 | 4.91 | 42% | 30.7° |
| 2039-07-14 Thu | 1 | — | unknown | — | 72.5° 09:40 | 4.95 | 33% | 19.0° |
| 2039-07-15 Fri | 2 | — | unknown | 04:40–04:50 (marginal, 0.17 h) | 72.5° 09:35 | 4.99 | 24% | 8.7° |
| 2039-07-16 Sat | 3 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:30 | 5.03 | 17% | 8.3° |
| 2039-07-17 Sun | 4 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:25 | 5.08 | 10% | 18.5° |
| 2039-07-18 Mon | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:20 | 5.12 | 5% | 29.9° |
| 2039-07-19 Tue | 7 | — | unknown | 04:10–04:50 (marginal, 0.67 h) | 72.5° 09:20 | 5.17 | 2% | 41.7° |
| 2039-07-20 Wed | 8 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.22 | 0% | 53.8° |
| 2039-07-21 Thu | 10 | — | unknown | 04:05–04:10 (good, 0.08 h) | 72.5° 09:10 | 5.27 | 0% | 66.0° |
| 2039-07-22 Fri | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.31 | 3% | 78.4° |
| 2039-07-23 Sat | 13 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.36 | 7% | 91.1° |
| 2039-07-24 Sun | 16 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 09:00 | 5.41 | 13% | 103.9° |
| 2039-07-25 Mon | 18 | — | unknown | 03:50–04:15 (good, 0.42 h) | 72.5° 08:55 | 5.47 | 21% | 117.0° |
| 2039-07-26 Tue | 20 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.5° 08:50 | 5.52 | 30% | 130.2° |
| 2039-07-27 Wed | 21 | — | unknown | 03:40–04:15 (good, 0.58 h) | 72.5° 08:45 | 5.57 | 41% | 143.7° |
| 2039-07-28 Thu | 24 | — | unknown | 03:35–04:20 (good, 0.75 h) | 72.5° 08:45 | 5.62 | 52% | 157.2° |
| 2039-07-29 Fri | 25 | — | unknown | 03:35–04:20 (good, 0.75 h) | 72.5° 08:40 | 5.68 | 64% | 170.1° |
| 2039-07-30 Sat | 27 | — | unknown | 03:30–04:20 (good, 0.83 h) | 72.5° 08:35 | 5.73 | 74% | 171.2° |
| 2039-07-31 Sun | 28 | — | unknown | 03:25–04:25 (good, 1.0 h) | 72.5° 08:30 | 5.78 | 84% | 158.2° |
| 2039-08-01 Mon | 30 | — | unknown | 03:30–04:25 (good, 0.92 h) | 72.5° 08:25 | 5.84 | 92% | 143.9° |
| 2039-08-02 Tue | 28 | — | unknown | 03:25–04:25 (good, 1.0 h) | 72.5° 08:25 | 5.89 | 97% | 129.4° |
| 2039-08-03 Wed | 27 | — | unknown | 03:25–04:30 (good, 1.08 h) | 72.5° 08:20 | 5.95 | 100% | 114.9° |
| 2039-08-04 Thu | 23 | — | unknown | 03:30–04:30 (good, 1.0 h) | 72.5° 08:15 | 6.01 | 100% | 100.6° |
| 2039-08-05 Fri | 19 | — | unknown | 04:10–04:30 (good, 0.33 h) | 72.5° 08:10 | 6.06 | 97% | 86.6° |
| 2039-08-06 Sat | 17 | — | unknown | 02:45–04:35 (marginal, 1.83 h) | 72.5° 08:05 | 6.12 | 92% | 73.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2039-07-08&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.