← 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. |
|---|---|---|---|---|---|---|---|---|
| 2037-04-30 Thu | 45 | — | unknown | 02:15–04:35 (good, 2.33 h) | 87.3° 07:45 | 6.4 | 98% | 93.2° |
| 2037-05-01 Fri | 43 | — | unknown | 02:25–04:30 (good, 2.08 h) | 87.3° 07:40 | 6.34 | 94% | 86.3° |
| 2037-05-02 Sat | 43 | — | unknown | 02:10–04:30 (good, 2.33 h) | 87.3° 07:35 | 6.29 | 88% | 79.8° |
| 2037-05-03 Sun | 45 | — | unknown | 01:45–04:25 (good, 2.67 h) | 87.3° 07:30 | 6.23 | 80% | 73.9° |
| 2037-05-04 Mon | 49 | — | unknown | 01:35–04:25 (good, 2.83 h) | 87.3° 07:30 | 6.17 | 72% | 68.8° |
| 2037-05-05 Tue | 61 | — | unknown | 01:10–04:25 (good, 3.25 h) | 87.3° 07:25 | 6.11 | 62% | 64.8° |
| 2037-05-06 Wed | 69 | — | unknown | 01:05–04:20 (good, 3.25 h) | 87.3° 07:20 | 6.06 | 53% | 62.0° |
| 2037-05-07 Thu | 76 | — | unknown | 01:00–04:20 (good, 3.33 h) | 87.3° 07:15 | 6.0 | 43% | 60.5° |
| 2037-05-08 Fri | 84 | — | unknown | 00:55–04:20 (good, 3.42 h) | 87.3° 07:10 | 5.94 | 34% | 60.4° |
| 2037-05-09 Sat | 89 | — | unknown | 00:55–04:15 (good, 3.33 h) | 87.3° 07:10 | 5.89 | 25% | 61.6° |
| 2037-05-10 Sun | 91 | — | unknown | 00:50–04:15 (good, 3.42 h) | 87.3° 07:05 | 5.83 | 18% | 64.2° |
| 2037-05-11 Mon | 93 | — | unknown | 00:45–04:15 (good, 3.5 h) | 87.3° 07:00 | 5.78 | 11% | 67.9° |
| 2037-05-12 Tue | 94 | — | unknown | 00:40–04:10 (good, 3.5 h) | 87.3° 06:55 | 5.72 | 6% | 72.6° |
| 2037-05-13 Wed | 96 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.3° 06:50 | 5.67 | 2% | 78.1° |
| 2037-05-14 Thu | 97 | — | unknown | 00:35–04:10 (good, 3.58 h) | 87.3° 06:50 | 5.61 | 0% | 84.1° |
| 2037-05-15 Fri | 97 | — | unknown | 00:30–04:05 (good, 3.58 h) | 87.3° 06:45 | 5.56 | 1% | 90.5° |
| 2037-05-16 Sat | 99 | — | unknown | 00:25–04:05 (good, 3.67 h) | 87.3° 06:40 | 5.51 | 3% | 96.9° |
| 2037-05-17 Sun | 100 | — | unknown | 00:20–04:05 (good, 3.75 h) | 87.3° 06:35 | 5.46 | 8% | 103.2° |
| 2037-05-18 Mon | 100 | — | unknown | 00:20–04:00 (good, 3.67 h) | 87.3° 06:35 | 5.4 | 15% | 109.0° |
| 2037-05-19 Tue | 100 | — | unknown | 00:15–04:00 (good, 3.75 h) | 87.3° 06:30 | 5.35 | 24% | 113.8° |
| 2037-05-20 Wed | 100 | — | unknown | 00:15–04:00 (good, 3.75 h) | 87.3° 06:25 | 5.3 | 34% | 117.4° |
| 2037-05-21 Thu | 100 | — | unknown | 00:10–04:00 (good, 3.83 h) | 87.3° 06:20 | 5.25 | 45% | 119.4° |
| 2037-05-22 Fri | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 87.3° 06:15 | 5.21 | 56% | 119.4° |
| 2037-05-23 Sat | 100 | — | unknown | 00:10–03:55 (good, 3.75 h) | 87.3° 06:15 | 5.16 | 68% | 117.4° |
| 2037-05-24 Sun | 98 | — | unknown | 00:10–03:55 (good, 3.75 h) | 87.3° 06:10 | 5.11 | 78% | 113.7° |
| 2037-05-25 Mon | 83 | — | unknown | 00:10–03:50 (good, 3.67 h) | 87.3° 06:05 | 5.07 | 87% | 108.6° |
| 2037-05-26 Tue | 75 | — | unknown | 00:15–03:50 (good, 3.58 h) | 87.3° 06:00 | 5.02 | 93% | 102.5° |
| 2037-05-27 Wed | 68 | — | unknown | 00:20–03:50 (good, 3.5 h) | 87.3° 05:55 | 4.98 | 98% | 95.8° |
| 2037-05-28 Thu | 61 | — | unknown | 00:50–03:50 (good, 3.0 h) | 87.3° 05:55 | 4.94 | 100% | 89.0° |
| 2037-05-29 Fri | 56 | — | unknown | 01:10–03:50 (good, 2.67 h) | 87.3° 05:50 | 4.9 | 99% | 82.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-04-30&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.