← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-07-23 Thu | 13 | 33 | 4 | 03:30–04:00 (marginal, 0.5 h) | 72.5° 09:00 | 5.37 | 73% | 178.5° |
| 2026-07-24 Fri | 17 | 0 | 0 | — | 72.5° 08:55 | 5.42 | 81% | 169.2° |
| 2026-07-25 Sat | 19 | 92 | 17 | 03:55–04:15 (good, 0.33 h) | 72.5° 08:55 | 5.47 | 88% | 157.4° |
| 2026-07-26 Sun | 20 | 75 | 15 | 03:55–04:00 (good, 0.08 h) | 72.5° 08:50 | 5.52 | 93% | 145.5° |
| 2026-07-27 Mon | 19 | 98 | 19 | 03:50–04:20 (good, 0.5 h) | 72.5° 08:45 | 5.58 | 97% | 133.6° |
| 2026-07-28 Tue | 20 | 83 | 17 | 03:10–04:20 (marginal, 1.17 h) | 72.5° 08:40 | 5.63 | 100% | 121.6° |
| 2026-07-29 Wed | 18 | 100 | 18 | 03:50–04:20 (good, 0.5 h) | 72.5° 08:40 | 5.68 | 100% | 109.3° |
| 2026-07-30 Thu | 16 | 100 | 16 | 03:55–04:20 (good, 0.42 h) | 72.5° 08:35 | 5.74 | 98% | 97.0° |
| 2026-07-31 Fri | 14 | 100 | 14 | 03:00–04:25 (marginal, 1.42 h) | 72.5° 08:30 | 5.79 | 95% | 84.4° |
| 2026-08-01 Sat | 12 | 100 | 12 | 03:05–04:25 (marginal, 1.33 h) | 72.5° 08:25 | 5.85 | 89% | 71.6° |
| 2026-08-02 Sun | 11 | 100 | 11 | 03:05–04:25 (marginal, 1.33 h) | 72.5° 08:20 | 5.9 | 82% | 58.7° |
| 2026-08-03 Mon | 11 | 100 | 11 | 03:00–04:30 (marginal, 1.5 h) | 72.5° 08:20 | 5.96 | 73% | 45.5° |
| 2026-08-04 Tue | 11 | 99 | 11 | 02:55–04:30 (marginal, 1.58 h) | 72.5° 08:15 | 6.01 | 63% | 32.0° |
| 2026-08-05 Wed | 16 | 97 | 16 | 02:45–04:30 (marginal, 1.75 h) | 72.5° 08:10 | 6.07 | 52% | 18.3° |
| 2026-08-06 Thu | 22 | 97 | 21 | 03:35–04:35 (good, 1.0 h) | 72.5° 08:05 | 6.13 | 40% | 4.4° |
| 2026-08-07 Fri | 29 | 100 | 29 | 03:10–04:35 (good, 1.42 h) | 72.5° 08:00 | 6.18 | 30% | 10.0° |
| 2026-08-08 Sat | 36 | 63 | 23 | 02:25–04:35 (marginal, 2.17 h) | 72.5° 08:00 | 6.24 | 19% | 24.5° |
| 2026-08-09 Sun | 44 | 99 | 44 | 02:55–04:40 (good, 1.75 h) | 72.5° 07:55 | 6.3 | 11% | 39.1° |
| 2026-08-10 Mon | 49 | 100 | 49 | 02:45–04:40 (good, 1.92 h) | 72.5° 07:50 | 6.35 | 5% | 53.9° |
| 2026-08-11 Tue | 52 | 100 | 52 | 02:40–04:40 (good, 2.0 h) | 72.5° 07:45 | 6.41 | 1% | 68.6° |
| 2026-08-12 Wed | 55 | 100 | 55 | 02:40–04:45 (good, 2.08 h) | 72.5° 07:40 | 6.47 | 0% | 83.1° |
| 2026-08-13 Thu | 57 | 0 | 0 | — | 72.5° 07:40 | 6.53 | 2% | 97.4° |
| 2026-08-14 Fri | 59 | 46 | 27 | 04:00–04:45 (good, 0.75 h) | 72.5° 07:35 | 6.58 | 6% | 111.3° |
| 2026-08-15 Sat | 61 | 100 | 61 | 02:25–04:45 (good, 2.33 h) | 72.5° 07:30 | 6.64 | 12% | 124.9° |
| 2026-08-16 Sun | 65 | 100 | 65 | 02:20–04:50 (good, 2.5 h) | 72.5° 07:25 | 6.7 | 20% | 138.0° |
| 2026-08-17 Mon | 67 | 100 | 67 | 02:15–04:50 (good, 2.58 h) | 72.5° 07:25 | 6.76 | 29% | 150.7° |
| 2026-08-18 Tue | 69 | 33 | 23 | 01:45–03:00 (marginal, 1.25 h) | 72.5° 07:20 | 6.81 | 39% | 163.0° |
| 2026-08-19 Wed | 72 | 100 | 72 | 02:10–04:55 (good, 2.75 h) | 72.5° 07:15 | 6.87 | 48% | 175.0° |
| 2026-08-20 Thu | 74 | 100 | 74 | 02:05–04:55 (good, 2.83 h) | 72.5° 07:10 | 6.93 | 58% | 172.8° |
| 2026-08-21 Fri | 77 | 100 | 77 | 02:00–04:55 (good, 2.92 h) | 72.5° 07:05 | 6.99 | 67% | 161.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-07-23&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.