← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-05-07 Thu | 70 | — | unknown | 01:15–04:20 (good, 3.08 h) | 71.1° 06:20 | 6.0 | 43% | 46.7° |
| 2037-05-08 Fri | 77 | — | unknown | 01:15–04:20 (good, 3.08 h) | 71.1° 06:15 | 5.94 | 34% | 52.0° |
| 2037-05-09 Sat | 83 | — | unknown | 01:10–04:15 (good, 3.08 h) | 71.1° 06:10 | 5.89 | 25% | 58.7° |
| 2037-05-10 Sun | 85 | — | unknown | 01:05–04:15 (good, 3.17 h) | 71.1° 06:05 | 5.83 | 18% | 66.4° |
| 2037-05-11 Mon | 87 | — | unknown | 01:00–04:15 (good, 3.25 h) | 71.1° 06:00 | 5.78 | 11% | 74.8° |
| 2037-05-12 Tue | 88 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 06:00 | 5.72 | 6% | 83.6° |
| 2037-05-13 Wed | 90 | — | unknown | 00:55–04:10 (good, 3.25 h) | 71.1° 05:55 | 5.67 | 2% | 92.7° |
| 2037-05-14 Thu | 91 | — | unknown | 00:50–04:10 (good, 3.33 h) | 71.1° 05:50 | 5.61 | 0% | 102.0° |
| 2037-05-15 Fri | 90 | — | unknown | 00:45–04:05 (good, 3.33 h) | 71.1° 05:45 | 5.56 | 1% | 111.1° |
| 2037-05-16 Sat | 92 | — | unknown | 00:40–04:05 (good, 3.42 h) | 71.1° 05:45 | 5.51 | 3% | 119.8° |
| 2037-05-17 Sun | 94 | — | unknown | 00:40–04:05 (good, 3.42 h) | 71.1° 05:40 | 5.46 | 8% | 127.5° |
| 2037-05-18 Mon | 95 | — | unknown | 00:35–04:00 (good, 3.42 h) | 71.1° 05:35 | 5.4 | 15% | 133.5° |
| 2037-05-19 Tue | 95 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:30 | 5.35 | 24% | 136.9° |
| 2037-05-20 Wed | 96 | — | unknown | 00:30–04:00 (good, 3.5 h) | 71.1° 05:25 | 5.3 | 34% | 136.8° |
| 2037-05-21 Thu | 96 | — | unknown | 00:25–04:00 (good, 3.58 h) | 71.1° 05:25 | 5.25 | 45% | 133.2° |
| 2037-05-22 Fri | 96 | — | unknown | 00:25–03:55 (good, 3.5 h) | 71.1° 05:20 | 5.21 | 56% | 126.8° |
| 2037-05-23 Sat | 95 | — | unknown | 00:20–03:55 (good, 3.58 h) | 71.1° 05:15 | 5.16 | 68% | 118.4° |
| 2037-05-24 Sun | 90 | — | unknown | 00:25–03:55 (good, 3.5 h) | 71.1° 05:10 | 5.11 | 78% | 108.9° |
| 2037-05-25 Mon | 71 | — | unknown | 00:30–03:50 (good, 3.33 h) | 71.1° 05:05 | 5.07 | 87% | 98.6° |
| 2037-05-26 Tue | 61 | — | unknown | 01:00–03:50 (good, 2.83 h) | 71.1° 05:05 | 5.02 | 93% | 88.2° |
| 2037-05-27 Wed | 51 | — | unknown | 01:50–03:50 (good, 2.0 h) | 71.1° 05:00 | 4.98 | 98% | 77.9° |
| 2037-05-28 Thu | 43 | — | unknown | 02:40–03:50 (good, 1.17 h) | 71.1° 04:55 | 4.94 | 100% | 68.1° |
| 2037-05-29 Fri | 37 | — | unknown | 23:35–03:50 (marginal, 4.25 h) | 71.1° 04:50 | 4.9 | 99% | 59.3° |
| 2037-05-30 Sat | 34 | — | unknown | 23:30–03:45 (marginal, 4.25 h) | 71.1° 04:50 | 4.86 | 96% | 51.8° |
| 2037-05-31 Sun | 36 | — | unknown | 23:20–03:45 (marginal, 4.42 h) | 71.1° 04:45 | 4.82 | 92% | 46.2° |
| 2037-06-01 Mon | 54 | — | unknown | 23:40–00:00 (good, 0.33 h) | 71.1° 04:40 | 4.78 | 85% | 43.2° |
| 2037-06-02 Tue | 70 | — | unknown | 23:35–03:45 (good, 4.17 h) | 71.1° 04:35 | 4.75 | 77% | 43.0° |
| 2037-06-03 Wed | 83 | — | unknown | 23:30–03:45 (good, 4.25 h) | 71.1° 04:30 | 4.72 | 69% | 45.6° |
| 2037-06-04 Thu | 94 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:30 | 4.68 | 60% | 50.3° |
| 2037-06-05 Fri | 97 | — | unknown | 23:25–03:40 (good, 4.25 h) | 71.1° 04:25 | 4.65 | 50% | 56.6° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-05-07&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.