← 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. |
|---|---|---|---|---|---|---|---|---|
| 2031-06-27 Fri | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.1° 08:30 | 4.46 | 49% | 148.6° |
| 2031-06-28 Sat | 25 | — | unknown | 03:00–03:40 (good, 0.67 h) | 79.1° 08:30 | 4.48 | 60% | 158.2° |
| 2031-06-29 Sun | 25 | — | unknown | 02:55–03:40 (good, 0.75 h) | 79.1° 08:25 | 4.5 | 70% | 162.8° |
| 2031-06-30 Mon | 28 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:20 | 4.51 | 80% | 158.2° |
| 2031-07-01 Tue | 28 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:15 | 4.53 | 88% | 147.4° |
| 2031-07-02 Wed | 26 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:15 | 4.56 | 95% | 134.4° |
| 2031-07-03 Thu | 26 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:10 | 4.58 | 99% | 120.5° |
| 2031-07-04 Fri | 23 | — | unknown | 02:55–03:45 (good, 0.83 h) | 79.1° 08:05 | 4.6 | 100% | 106.0° |
| 2031-07-05 Sat | 19 | — | unknown | 03:20–03:45 (good, 0.42 h) | 79.1° 08:00 | 4.63 | 98% | 91.5° |
| 2031-07-06 Sun | 16 | — | unknown | 02:10–03:50 (marginal, 1.67 h) | 79.1° 07:55 | 4.66 | 93% | 77.1° |
| 2031-07-07 Mon | 15 | — | unknown | 02:10–03:50 (marginal, 1.67 h) | 79.1° 07:55 | 4.69 | 86% | 63.1° |
| 2031-07-08 Tue | 14 | — | unknown | 02:05–03:50 (marginal, 1.75 h) | 79.1° 07:50 | 4.72 | 77% | 49.7° |
| 2031-07-09 Wed | 15 | — | unknown | 01:55–03:50 (marginal, 1.92 h) | 79.1° 07:45 | 4.76 | 66% | 37.2° |
| 2031-07-10 Thu | 19 | — | unknown | 01:50–03:55 (marginal, 2.08 h) | 79.1° 07:40 | 4.79 | 56% | 26.3° |
| 2031-07-11 Fri | 25 | — | unknown | 02:35–03:55 (good, 1.33 h) | 79.1° 07:35 | 4.83 | 45% | 18.6° |
| 2031-07-12 Sat | 32 | — | unknown | 02:25–03:55 (good, 1.5 h) | 79.1° 07:35 | 4.87 | 36% | 18.1° |
| 2031-07-13 Sun | 39 | — | unknown | 02:10–03:55 (good, 1.75 h) | 79.1° 07:30 | 4.91 | 26% | 24.7° |
| 2031-07-14 Mon | 47 | — | unknown | 02:00–04:00 (good, 2.0 h) | 79.1° 07:25 | 4.95 | 18% | 34.3° |
| 2031-07-15 Tue | 53 | — | unknown | 01:55–04:00 (good, 2.08 h) | 79.1° 07:20 | 4.99 | 12% | 44.8° |
| 2031-07-16 Wed | 58 | — | unknown | 01:50–04:00 (good, 2.17 h) | 79.1° 07:15 | 5.03 | 6% | 55.8° |
| 2031-07-17 Thu | 60 | — | unknown | 01:45–04:00 (good, 2.25 h) | 79.1° 07:15 | 5.08 | 2% | 66.9° |
| 2031-07-18 Fri | 63 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:10 | 5.12 | 0% | 78.2° |
| 2031-07-19 Sat | 65 | — | unknown | 01:40–04:05 (good, 2.42 h) | 79.1° 07:05 | 5.17 | 0% | 89.5° |
| 2031-07-20 Sun | 68 | — | unknown | 01:35–04:05 (good, 2.5 h) | 79.1° 07:00 | 5.21 | 2% | 100.8° |
| 2031-07-21 Mon | 71 | — | unknown | 01:30–04:10 (good, 2.67 h) | 79.1° 07:00 | 5.26 | 5% | 112.2° |
| 2031-07-22 Tue | 73 | — | unknown | 01:25–04:10 (good, 2.75 h) | 79.1° 06:55 | 5.31 | 10% | 123.5° |
| 2031-07-23 Wed | 75 | — | unknown | 01:25–04:10 (good, 2.75 h) | 79.1° 06:50 | 5.36 | 17% | 134.8° |
| 2031-07-24 Thu | 79 | — | unknown | 01:20–04:15 (good, 2.92 h) | 79.1° 06:45 | 5.41 | 25% | 145.8° |
| 2031-07-25 Fri | 82 | — | unknown | 01:15–04:15 (good, 3.0 h) | 79.1° 06:40 | 5.46 | 34% | 155.7° |
| 2031-07-26 Sat | 84 | — | unknown | 01:10–04:15 (good, 3.08 h) | 79.1° 06:40 | 5.51 | 45% | 162.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2031-06-27&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.