← 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. |
|---|---|---|---|---|---|---|---|---|
| 2025-04-29 Tue | 80 | 100 | 80 | 01:30–04:35 (good, 3.08 h) | 87.2° 07:45 | 6.47 | 7% | 86.0° |
| 2025-04-30 Wed | 81 | 87 | 71 | 01:35–04:35 (good, 3.0 h) | 87.2° 07:45 | 6.41 | 14% | 93.6° |
| 2025-05-01 Thu | 81 | 28 | 22 | 03:00–04:30 (marginal, 1.5 h) | 87.3° 07:40 | 6.35 | 23% | 100.8° |
| 2025-05-02 Fri | 82 | 99 | 82 | 01:25–04:30 (good, 3.08 h) | 87.3° 07:35 | 6.29 | 33% | 107.3° |
| 2025-05-03 Sat | 82 | 100 | 82 | 01:20–04:25 (good, 3.08 h) | 87.3° 07:30 | 6.23 | 43% | 112.8° |
| 2025-05-04 Sun | 81 | 13 | 10 | 00:45–01:00 (marginal, 0.25 h) | 87.2° 07:30 | 6.18 | 54% | 117.1° |
| 2025-05-05 Mon | 83 | 76 | 63 | 04:00–04:25 (good, 0.42 h) | 87.3° 07:25 | 6.12 | 64% | 120.0° |
| 2025-05-06 Tue | 82 | 0 | 0 | — | 87.3° 07:20 | 6.06 | 73% | 121.3° |
| 2025-05-07 Wed | 82 | 73 | 60 | 01:15–04:00 (good, 2.75 h) | 87.3° 07:15 | 6.0 | 81% | 121.0° |
| 2025-05-08 Thu | 76 | 74 | 56 | 01:10–04:00 (good, 2.83 h) | 87.2° 07:10 | 5.95 | 88% | 119.3° |
| 2025-05-09 Fri | 72 | 0 | 0 | — | 87.2° 07:10 | 5.89 | 93% | 116.2° |
| 2025-05-10 Sat | 70 | 0 | 0 | — | 87.3° 07:05 | 5.84 | 97% | 112.1° |
| 2025-05-11 Sun | 66 | 0 | 0 | — | 87.3° 07:00 | 5.78 | 99% | 107.1° |
| 2025-05-12 Mon | 62 | 0 | 0 | — | 87.3° 06:55 | 5.73 | 100% | 101.5° |
| 2025-05-13 Tue | 59 | 0 | 0 | — | 87.2° 06:50 | 5.67 | 98% | 95.5° |
| 2025-05-14 Wed | 57 | 100 | 57 | 01:00–04:10 (good, 3.17 h) | 87.2° 06:50 | 5.62 | 95% | 89.2° |
| 2025-05-15 Thu | 55 | 0 | 0 | — | 87.3° 06:45 | 5.56 | 90% | 82.9° |
| 2025-05-16 Fri | 58 | 0 | 0 | — | 87.3° 06:40 | 5.51 | 84% | 76.7° |
| 2025-05-17 Sat | 69 | 18 | 13 | 00:00–01:00 (marginal, 1.0 h) | 87.3° 06:35 | 5.46 | 76% | 71.0° |
| 2025-05-18 Sun | 76 | 100 | 76 | 00:20–04:00 (good, 3.67 h) | 87.2° 06:30 | 5.41 | 66% | 65.9° |
| 2025-05-19 Mon | 83 | 95 | 79 | 00:30–04:00 (good, 3.5 h) | 87.3° 06:30 | 5.36 | 56% | 61.9° |
| 2025-05-20 Tue | 90 | 31 | 28 | 03:00–04:00 (good, 1.0 h) | 87.3° 06:25 | 5.31 | 45% | 59.3° |
| 2025-05-21 Wed | 96 | 74 | 71 | 00:15–02:00 (good, 1.75 h) | 87.3° 06:20 | 5.26 | 34% | 58.6° |
| 2025-05-22 Thu | 99 | 96 | 95 | 00:05–03:55 (good, 3.83 h) | 87.2° 06:15 | 5.21 | 24% | 59.9° |
| 2025-05-23 Fri | 100 | 6 | 6 | — | 87.2° 06:15 | 5.16 | 15% | 63.3° |
| 2025-05-24 Sat | 100 | 0 | 0 | — | 87.3° 06:10 | 5.12 | 7% | 68.6° |
| 2025-05-25 Sun | 100 | 0 | 0 | — | 87.3° 06:05 | 5.07 | 2% | 75.2° |
| 2025-05-26 Mon | 100 | 76 | 76 | 01:25–03:50 (good, 2.42 h) | 87.3° 06:00 | 5.03 | 0% | 82.6° |
| 2025-05-27 Tue | 100 | 99 | 99 | 23:40–03:50 (good, 4.17 h) | 87.2° 05:55 | 4.98 | 1% | 90.4° |
| 2025-05-28 Wed | 100 | 91 | 91 | 23:40–03:50 (good, 4.17 h) | 87.2° 05:55 | 4.94 | 5% | 98.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2025-04-29&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.