← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-06-09 Tue | 39 | — | unknown | 23:05–00:30 (good, 1.42 h) | 50.2° 20:40 | 4.55 | 15% | 152.3° |
| 2037-06-10 Wed | 38 | — | unknown | 23:05–00:25 (good, 1.33 h) | 50.2° 20:35 | 4.53 | 9% | 139.7° |
| 2037-06-11 Thu | 35 | — | unknown | 23:10–00:20 (good, 1.17 h) | 50.2° 20:30 | 4.51 | 4% | 126.9° |
| 2037-06-12 Fri | 33 | — | unknown | 23:10–00:20 (good, 1.17 h) | 50.2° 20:25 | 4.49 | 1% | 113.6° |
| 2037-06-13 Sat | 33 | — | unknown | 23:10–00:15 (good, 1.08 h) | 50.1° 20:25 | 4.47 | 0% | 100.1° |
| 2037-06-14 Sun | 30 | — | unknown | 23:10–00:10 (good, 1.0 h) | 50.2° 20:20 | 4.46 | 2% | 86.3° |
| 2037-06-15 Mon | 29 | — | unknown | 23:10–00:05 (good, 0.92 h) | 50.2° 20:15 | 4.45 | 6% | 72.3° |
| 2037-06-16 Tue | 26 | — | unknown | 23:10–00:05 (good, 0.92 h) | 50.2° 20:10 | 4.44 | 13% | 58.1° |
| 2037-06-17 Wed | 22 | — | unknown | 23:10–23:50 (good, 0.67 h) | 50.2° 20:05 | 4.43 | 21% | 43.9° |
| 2037-06-18 Thu | 18 | — | unknown | 23:10–23:40 (good, 0.5 h) | 50.1° 20:05 | 4.43 | 32% | 29.6° |
| 2037-06-19 Fri | 14 | — | unknown | 23:10–23:25 (good, 0.25 h) | 50.2° 20:00 | 4.42 | 43% | 15.4° |
| 2037-06-20 Sat | 10 | — | unknown | 23:15–00:10 (marginal, 0.92 h) | 50.2° 19:55 | 4.42 | 54% | 1.2° |
| 2037-06-21 Sun | 7 | — | unknown | 23:15–00:00 (marginal, 0.75 h) | 50.2° 19:50 | 4.42 | 65% | 12.9° |
| 2037-06-22 Mon | 5 | — | unknown | 23:15–23:45 (marginal, 0.5 h) | 50.1° 19:45 | 4.43 | 76% | 26.9° |
| 2037-06-23 Tue | 5 | — | unknown | 23:15–23:40 (marginal, 0.42 h) | 50.2° 19:45 | 4.43 | 85% | 40.7° |
| 2037-06-24 Wed | 5 | — | unknown | 23:15–23:40 (marginal, 0.42 h) | 50.2° 19:40 | 4.44 | 92% | 54.4° |
| 2037-06-25 Thu | 5 | — | unknown | 23:15–23:45 (marginal, 0.5 h) | 50.2° 19:35 | 4.45 | 97% | 67.8° |
| 2037-06-26 Fri | 6 | — | unknown | 23:15–23:45 (marginal, 0.5 h) | 50.2° 19:30 | 4.46 | 99% | 81.1° |
| 2037-06-27 Sat | 7 | — | unknown | 23:15–23:50 (marginal, 0.58 h) | 50.1° 19:30 | 4.47 | 100% | 94.1° |
| 2037-06-28 Sun | 8 | — | unknown | 23:10–23:45 (marginal, 0.58 h) | 50.2° 19:25 | 4.49 | 98% | 106.8° |
| 2037-06-29 Mon | 8 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.2° 19:20 | 4.51 | 95% | 119.4° |
| 2037-06-30 Tue | 8 | — | unknown | 22:20–23:35 (marginal, 1.25 h) | 50.2° 19:15 | 4.52 | 89% | 131.6° |
| 2037-07-01 Wed | 7 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.2° 19:10 | 4.55 | 83% | 143.7° |
| 2037-07-02 Thu | 7 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.1° 19:10 | 4.57 | 75% | 155.6° |
| 2037-07-03 Fri | 6 | — | unknown | 22:20–22:55 (marginal, 0.58 h) | 50.2° 19:05 | 4.59 | 66% | 167.5° |
| 2037-07-04 Sat | 5 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.2° 19:00 | 4.62 | 57% | 179.4° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-06-09&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.