← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-06-30 Tue | 0 | — | unknown | — | 72.5° 10:30 | 4.52 | 89% | 102.3° |
| 2037-07-01 Wed | 0 | — | unknown | — | 72.5° 10:25 | 4.55 | 83% | 90.4° |
| 2037-07-02 Thu | 0 | — | unknown | — | 72.5° 10:25 | 4.57 | 75% | 78.6° |
| 2037-07-03 Fri | 0 | — | unknown | — | 72.5° 10:20 | 4.59 | 66% | 66.9° |
| 2037-07-04 Sat | 0 | — | unknown | — | 72.5° 10:15 | 4.62 | 57% | 55.2° |
| 2037-07-05 Sun | 0 | — | unknown | — | 72.5° 10:10 | 4.65 | 47% | 43.5° |
| 2037-07-06 Mon | 0 | — | unknown | — | 72.5° 10:05 | 4.68 | 38% | 31.8° |
| 2037-07-07 Tue | 0 | — | unknown | — | 72.5° 10:05 | 4.71 | 28% | 20.3° |
| 2037-07-08 Wed | 1 | — | unknown | — | 72.5° 10:00 | 4.74 | 20% | 10.4° |
| 2037-07-09 Thu | 1 | — | unknown | — | 72.5° 09:55 | 4.78 | 12% | 11.2° |
| 2037-07-10 Fri | 1 | — | unknown | — | 72.5° 09:50 | 4.81 | 6% | 22.3° |
| 2037-07-11 Sat | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:50 | 4.85 | 2% | 35.3° |
| 2037-07-12 Sun | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:45 | 4.89 | 0% | 49.1° |
| 2037-07-13 Mon | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:40 | 4.93 | 1% | 63.3° |
| 2037-07-14 Tue | 2 | — | unknown | 04:30–04:45 (marginal, 0.25 h) | 72.5° 09:35 | 4.97 | 5% | 77.7° |
| 2037-07-15 Wed | 3 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:30 | 5.01 | 11% | 92.2° |
| 2037-07-16 Thu | 4 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:30 | 5.06 | 19% | 106.6° |
| 2037-07-17 Fri | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 72.5° 09:25 | 5.1 | 29% | 120.9° |
| 2037-07-18 Sat | 7 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 72.5° 09:20 | 5.15 | 40% | 134.9° |
| 2037-07-19 Sun | 7 | — | unknown | 04:10–04:55 (marginal, 0.75 h) | 72.5° 09:15 | 5.19 | 52% | 148.6° |
| 2037-07-20 Mon | 9 | — | unknown | 03:40–04:55 (marginal, 1.25 h) | 72.5° 09:10 | 5.24 | 63% | 161.4° |
| 2037-07-21 Tue | 11 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:10 | 5.29 | 73% | 170.9° |
| 2037-07-22 Wed | 12 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:05 | 5.34 | 82% | 166.5° |
| 2037-07-23 Thu | 14 | — | unknown | 03:55–04:10 (good, 0.25 h) | 72.5° 09:00 | 5.39 | 90% | 155.1° |
| 2037-07-24 Fri | 15 | — | unknown | 04:00–04:15 (good, 0.25 h) | 72.5° 08:55 | 5.44 | 95% | 142.8° |
| 2037-07-25 Sat | 16 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 08:55 | 5.49 | 98% | 130.4° |
| 2037-07-26 Sun | 16 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 08:50 | 5.54 | 100% | 118.2° |
| 2037-07-27 Mon | 16 | — | unknown | 03:55–04:20 (good, 0.42 h) | 72.5° 08:45 | 5.6 | 99% | 106.0° |
| 2037-07-28 Tue | 14 | — | unknown | 04:05–04:20 (good, 0.25 h) | 72.5° 08:40 | 5.65 | 97% | 94.0° |
| 2037-07-29 Wed | 12 | — | unknown | 03:10–04:20 (marginal, 1.17 h) | 72.5° 08:35 | 5.7 | 93% | 82.2° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-06-30&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.