← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-01-28 Wed | 21 | 0 | 0 | — | 79.1° 17:25 | 10.88 | 80% | 43.5° |
| 2026-01-29 Thu | 24 | 0 | 0 | — | 79.1° 17:20 | 10.85 | 88% | 57.1° |
| 2026-01-30 Fri | 31 | 0 | 0 | — | 79.1° 17:15 | 10.82 | 95% | 71.0° |
| 2026-01-31 Sat | 41 | 0 | 0 | — | 79.1° 17:15 | 10.79 | 99% | 84.9° |
| 2026-02-01 Sun | 54 | 0 | 0 | — | 79.1° 17:10 | 10.76 | 100% | 98.7° |
| 2026-02-02 Mon | 66 | 0 | 0 | — | 79.1° 17:05 | 10.72 | 99% | 112.2° |
| 2026-02-03 Tue | 80 | 10 | 8 | 18:45–19:00 (marginal, 0.25 h) | 79.1° 17:00 | 10.69 | 95% | 125.2° |
| 2026-02-04 Wed | 81 | 0 | 0 | — | 79.1° 16:55 | 10.66 | 89% | 137.7° |
| 2026-02-05 Thu | 80 | 0 | 0 | — | 79.1° 16:55 | 10.62 | 82% | 149.2° |
| 2026-02-06 Fri | 79 | 0 | 0 | — | 79.1° 16:50 | 10.59 | 74% | 159.1° |
| 2026-02-07 Sat | 76 | 90 | 69 | 19:20–22:10 (good, 2.83 h) | 79.1° 16:45 | 10.55 | 65% | 164.7° |
| 2026-02-08 Sun | 74 | 38 | 28 | 19:20–20:00 (good, 0.67 h) | 79.1° 16:40 | 10.51 | 56% | 162.1° |
| 2026-02-09 Mon | 71 | 0 | 0 | — | 79.1° 16:40 | 10.48 | 46% | 153.9° |
| 2026-02-10 Tue | 69 | 0 | 0 | — | 79.1° 16:35 | 10.44 | 37% | 143.8° |
| 2026-02-11 Wed | 66 | 0 | 0 | — | 79.1° 16:30 | 10.4 | 28% | 132.9° |
| 2026-02-12 Thu | 64 | 0 | 0 | — | 79.1° 16:25 | 10.36 | 20% | 121.6° |
| 2026-02-13 Fri | 62 | 0 | 0 | — | 79.1° 16:20 | 10.32 | 13% | 110.0° |
| 2026-02-14 Sat | 60 | 2 | 1 | — | 79.1° 16:20 | 10.29 | 7% | 98.0° |
| 2026-02-15 Sun | 57 | 0 | 0 | — | 79.1° 16:15 | 10.25 | 3% | 85.8° |
| 2026-02-16 Mon | 55 | 21 | 12 | 19:30–19:40 (good, 0.17 h) | 79.1° 16:10 | 10.21 | 0% | 73.4° |
| 2026-02-17 Tue | 53 | 0 | 0 | — | 79.1° 16:05 | 10.17 | 0% | 60.7° |
| 2026-02-18 Wed | 51 | 96 | 49 | 19:35–21:25 (good, 1.83 h) | 79.1° 16:00 | 10.12 | 2% | 48.0° |
| 2026-02-19 Thu | 47 | 0 | 0 | — | 79.1° 16:00 | 10.08 | 7% | 35.4° |
| 2026-02-20 Fri | 40 | 0 | 0 | — | 79.1° 15:55 | 10.04 | 14% | 23.8° |
| 2026-02-21 Sat | 34 | 0 | 0 | — | 79.1° 15:50 | 10.0 | 22% | 15.7° |
| 2026-02-22 Sun | 26 | 59 | 15 | 19:40–20:00 (good, 0.33 h) | 79.1° 15:45 | 9.96 | 32% | 17.7° |
| 2026-02-23 Mon | 19 | 14 | 3 | — | 79.1° 15:45 | 9.91 | 43% | 27.7° |
| 2026-02-24 Tue | 15 | 40 | 6 | 21:00–21:30 (marginal, 0.5 h) | 79.1° 15:40 | 9.87 | 55% | 40.1° |
| 2026-02-25 Wed | 13 | 100 | 13 | 19:40–21:20 (marginal, 1.67 h) | 79.1° 15:35 | 9.83 | 66% | 53.3° |
| 2026-02-26 Thu | 12 | 94 | 11 | 19:45–21:15 (marginal, 1.5 h) | 79.1° 15:30 | 9.78 | 76% | 66.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-01-28&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.