← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-07-05 Sun | 4 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.2° 18:55 | 4.65 | 47% | 168.7° |
| 2037-07-06 Mon | 4 | — | unknown | 22:15–22:45 (marginal, 0.5 h) | 50.1° 18:50 | 4.68 | 38% | 156.6° |
| 2037-07-07 Tue | 4 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.2° 18:50 | 4.71 | 28% | 144.3° |
| 2037-07-08 Wed | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.2° 18:45 | 4.74 | 20% | 131.7° |
| 2037-07-09 Thu | 3 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.2° 18:40 | 4.78 | 12% | 118.7° |
| 2037-07-10 Fri | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.2° 18:35 | 4.81 | 6% | 105.3° |
| 2037-07-11 Sat | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.85 | 2% | 91.5° |
| 2037-07-12 Sun | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:30 | 4.89 | 0% | 77.4° |
| 2037-07-13 Mon | 2 | — | unknown | — | 50.2° 18:25 | 4.93 | 1% | 62.9° |
| 2037-07-14 Tue | 2 | — | unknown | 22:10–22:15 (marginal, 0.08 h) | 50.2° 18:20 | 4.97 | 5% | 48.3° |
| 2037-07-15 Wed | 1 | — | unknown | — | 50.2° 18:15 | 5.01 | 11% | 33.7° |
| 2037-07-16 Thu | 1 | — | unknown | — | 50.1° 18:15 | 5.06 | 19% | 19.1° |
| 2037-07-17 Fri | 1 | — | unknown | — | 50.2° 18:10 | 5.1 | 29% | 4.6° |
| 2037-07-18 Sat | 0 | — | unknown | — | 50.2° 18:05 | 5.15 | 40% | 9.7° |
| 2037-07-19 Sun | 0 | — | unknown | — | 50.2° 18:00 | 5.19 | 52% | 23.8° |
| 2037-07-20 Mon | 0 | — | unknown | — | 50.1° 17:55 | 5.24 | 63% | 37.6° |
| 2037-07-21 Tue | 0 | — | unknown | — | 50.2° 17:55 | 5.29 | 73% | 51.1° |
| 2037-07-22 Wed | 0 | — | unknown | — | 50.2° 17:50 | 5.34 | 82% | 64.4° |
| 2037-07-23 Thu | 0 | — | unknown | — | 50.2° 17:45 | 5.39 | 90% | 77.5° |
| 2037-07-24 Fri | 0 | — | unknown | — | 50.2° 17:40 | 5.44 | 95% | 90.4° |
| 2037-07-25 Sat | 0 | — | unknown | — | 50.1° 17:35 | 5.49 | 98% | 103.1° |
| 2037-07-26 Sun | 0 | — | unknown | — | 50.2° 17:35 | 5.54 | 100% | 115.6° |
| 2037-07-27 Mon | 0 | — | unknown | — | 50.2° 17:30 | 5.6 | 99% | 127.9° |
| 2037-07-28 Tue | 0 | — | unknown | — | 50.2° 17:25 | 5.65 | 97% | 140.0° |
| 2037-07-29 Wed | 0 | — | unknown | — | 50.2° 17:20 | 5.7 | 93% | 152.0° |
| 2037-07-30 Thu | 0 | — | unknown | — | 50.1° 17:20 | 5.76 | 87% | 163.9° |
| 2037-07-31 Fri | 0 | — | unknown | — | 50.2° 17:15 | 5.81 | 80% | 175.7° |
| 2037-08-01 Sat | 0 | — | unknown | — | 50.2° 17:10 | 5.87 | 72% | 172.5° |
| 2037-08-02 Sun | 0 | — | unknown | — | 50.2° 17:05 | 5.92 | 63% | 160.5° |
| 2037-08-03 Mon | 0 | — | unknown | — | 50.1° 17:00 | 5.98 | 54% | 148.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-07-05&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.