← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-05-12 Tue | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.8° 10:40 | 5.72 | 6% | 38.4° |
| 2037-05-13 Wed | 4 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.7° 10:35 | 5.67 | 2% | 39.5° |
| 2037-05-14 Thu | 5 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.5° 10:30 | 5.61 | 0% | 43.8° |
| 2037-05-15 Fri | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.6° 10:30 | 5.56 | 1% | 50.5° |
| 2037-05-16 Sat | 5 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.8° 10:25 | 5.51 | 3% | 59.1° |
| 2037-05-17 Sun | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.8° 10:20 | 5.46 | 8% | 68.7° |
| 2037-05-18 Mon | 7 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.6° 10:15 | 5.4 | 15% | 79.0° |
| 2037-05-19 Tue | 7 | — | unknown | 04:10–04:45 (marginal, 0.58 h) | 89.5° 10:15 | 5.35 | 24% | 89.8° |
| 2037-05-20 Wed | 8 | — | unknown | 04:05–04:45 (marginal, 0.67 h) | 89.7° 10:10 | 5.3 | 34% | 100.6° |
| 2037-05-21 Thu | 9 | — | unknown | 03:30–04:45 (marginal, 1.25 h) | 89.8° 10:05 | 5.25 | 45% | 111.3° |
| 2037-05-22 Fri | 9 | — | unknown | 03:25–04:45 (marginal, 1.33 h) | 89.7° 10:00 | 5.21 | 56% | 121.5° |
| 2037-05-23 Sat | 10 | — | unknown | 03:20–04:40 (marginal, 1.33 h) | 89.6° 09:55 | 5.16 | 68% | 130.5° |
| 2037-05-24 Sun | 11 | — | unknown | 03:50–03:55 (good, 0.08 h) | 89.6° 09:55 | 5.11 | 78% | 137.5° |
| 2037-05-25 Mon | 10 | — | unknown | 03:10–03:50 (marginal, 0.67 h) | 89.7° 09:50 | 5.07 | 87% | 141.3° |
| 2037-05-26 Tue | 10 | — | unknown | 03:10–04:40 (marginal, 1.5 h) | 89.8° 09:45 | 5.02 | 93% | 140.7° |
| 2037-05-27 Wed | 11 | — | unknown | 03:05–04:40 (marginal, 1.58 h) | 89.7° 09:40 | 4.98 | 98% | 136.2° |
| 2037-05-28 Thu | 12 | — | unknown | 03:45–03:50 (good, 0.08 h) | 89.5° 09:35 | 4.94 | 100% | 128.8° |
| 2037-05-29 Fri | 13 | — | unknown | 03:40–03:50 (good, 0.17 h) | 89.6° 09:35 | 4.9 | 99% | 119.9° |
| 2037-05-30 Sat | 12 | — | unknown | 02:50–04:35 (marginal, 1.75 h) | 89.8° 09:30 | 4.86 | 96% | 110.2° |
| 2037-05-31 Sun | 11 | — | unknown | 02:50–04:35 (marginal, 1.75 h) | 89.8° 09:25 | 4.82 | 92% | 100.3° |
| 2037-06-01 Mon | 12 | — | unknown | 02:45–04:35 (marginal, 1.83 h) | 89.6° 09:20 | 4.78 | 85% | 90.5° |
| 2037-06-02 Tue | 12 | — | unknown | 02:40–04:35 (marginal, 1.92 h) | 89.5° 09:20 | 4.75 | 77% | 80.8° |
| 2037-06-03 Wed | 13 | — | unknown | 03:40–03:45 (good, 0.08 h) | 89.7° 09:15 | 4.72 | 69% | 71.5° |
| 2037-06-04 Thu | 14 | — | unknown | 03:35–03:40 (good, 0.08 h) | 89.8° 09:10 | 4.68 | 60% | 62.7° |
| 2037-06-05 Fri | 16 | — | unknown | 03:25–03:40 (good, 0.25 h) | 89.7° 09:05 | 4.65 | 50% | 54.6° |
| 2037-06-06 Sat | 18 | — | unknown | 03:15–03:40 (good, 0.42 h) | 89.6° 09:00 | 4.62 | 41% | 47.5° |
| 2037-06-07 Sun | 21 | — | unknown | 02:55–03:40 (good, 0.75 h) | 89.6° 09:00 | 4.6 | 32% | 42.1° |
| 2037-06-08 Mon | 27 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.7° 08:55 | 4.57 | 23% | 38.9° |
| 2037-06-09 Tue | 28 | — | unknown | 02:45–03:40 (good, 0.92 h) | 89.8° 08:50 | 4.55 | 15% | 38.9° |
| 2037-06-10 Wed | 30 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:45 | 4.53 | 9% | 42.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-05-12&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.