← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-06-19 Thu | 0 | — | unknown | — | 72.5° 11:15 | 4.42 | 22% | 27.9° |
| 2036-06-20 Fri | 0 | — | unknown | — | 72.5° 11:10 | 4.42 | 14% | 15.8° |
| 2036-06-21 Sat | 0 | — | unknown | — | 72.5° 11:05 | 4.42 | 7% | 9.2° |
| 2036-06-22 Sun | 0 | — | unknown | — | 72.5° 11:00 | 4.43 | 2% | 17.9° |
| 2036-06-23 Mon | 0 | — | unknown | — | 72.5° 10:55 | 4.43 | 0% | 31.5° |
| 2036-06-24 Tue | 0 | — | unknown | — | 72.5° 10:55 | 4.44 | 1% | 45.9° |
| 2036-06-25 Wed | 0 | — | unknown | — | 72.5° 10:50 | 4.45 | 5% | 60.7° |
| 2036-06-26 Thu | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 11% | 75.4° |
| 2036-06-27 Fri | 0 | — | unknown | — | 72.5° 10:40 | 4.48 | 20% | 89.9° |
| 2036-06-28 Sat | 0 | — | unknown | — | 72.5° 10:40 | 4.49 | 30% | 104.2° |
| 2036-06-29 Sun | 0 | — | unknown | — | 72.5° 10:35 | 4.51 | 41% | 118.0° |
| 2036-06-30 Mon | 0 | — | unknown | — | 72.5° 10:30 | 4.53 | 52% | 131.5° |
| 2036-07-01 Tue | 0 | — | unknown | — | 72.5° 10:25 | 4.55 | 63% | 144.4° |
| 2036-07-02 Wed | 0 | — | unknown | — | 72.5° 10:20 | 4.57 | 72% | 156.7° |
| 2036-07-03 Thu | 0 | — | unknown | — | 72.5° 10:20 | 4.6 | 81% | 167.4° |
| 2036-07-04 Fri | 0 | — | unknown | — | 72.5° 10:15 | 4.63 | 88% | 170.0° |
| 2036-07-05 Sat | 0 | — | unknown | — | 72.5° 10:10 | 4.65 | 94% | 161.4° |
| 2036-07-06 Sun | 0 | — | unknown | — | 72.5° 10:05 | 4.69 | 98% | 150.3° |
| 2036-07-07 Mon | 1 | — | unknown | — | 72.5° 10:00 | 4.72 | 100% | 138.7° |
| 2036-07-08 Tue | 1 | — | unknown | — | 72.5° 10:00 | 4.75 | 100% | 127.0° |
| 2036-07-09 Wed | 1 | — | unknown | — | 72.5° 09:55 | 4.79 | 98% | 115.3° |
| 2036-07-10 Thu | 1 | — | unknown | — | 72.5° 09:50 | 4.82 | 95% | 103.7° |
| 2036-07-11 Fri | 1 | — | unknown | — | 72.5° 09:45 | 4.86 | 90% | 92.0° |
| 2036-07-12 Sat | 1 | — | unknown | — | 72.5° 09:45 | 4.9 | 83% | 80.3° |
| 2036-07-13 Sun | 1 | — | unknown | — | 72.5° 09:40 | 4.94 | 75% | 68.5° |
| 2036-07-14 Mon | 1 | — | unknown | — | 72.5° 09:35 | 4.98 | 66% | 56.5° |
| 2036-07-15 Tue | 1 | — | unknown | — | 72.5° 09:30 | 5.02 | 57% | 44.4° |
| 2036-07-16 Wed | 2 | — | unknown | 03:55–04:00 (marginal, 0.08 h) | 72.5° 09:25 | 5.07 | 47% | 32.2° |
| 2036-07-17 Thu | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:25 | 5.11 | 36% | 20.1° |
| 2036-07-18 Fri | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:20 | 5.16 | 26% | 10.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-06-19&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.