← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-02-19 Thu | 13 | 0 | 0 | — | 71.1° 10:20 | 10.08 | 7% | 61.9° |
| 2026-02-20 Fri | 14 | 0 | 0 | — | 71.1° 10:20 | 10.04 | 14% | 70.8° |
| 2026-02-21 Sat | 15 | 0 | 0 | — | 71.1° 10:15 | 10.0 | 22% | 80.4° |
| 2026-02-22 Sun | 16 | 2 | 0 | — | 71.1° 10:10 | 9.96 | 32% | 90.3° |
| 2026-02-23 Mon | 17 | 31 | 5 | 05:15–05:35 (marginal, 0.33 h) | 71.1° 10:05 | 9.91 | 43% | 100.3° |
| 2026-02-24 Tue | 17 | 4 | 1 | — | 71.1° 10:00 | 9.87 | 55% | 110.0° |
| 2026-02-25 Wed | 19 | 0 | 0 | — | 71.1° 10:00 | 9.83 | 66% | 118.9° |
| 2026-02-26 Thu | 19 | 57 | 11 | 04:35–05:30 (marginal, 0.92 h) | 71.1° 09:55 | 9.78 | 76% | 126.6° |
| 2026-02-27 Fri | 20 | 94 | 19 | 05:05–05:30 (good, 0.42 h) | 71.1° 09:50 | 9.74 | 85% | 132.3° |
| 2026-02-28 Sat | 17 | 100 | 17 | 04:55–05:25 (good, 0.5 h) | 71.1° 09:45 | 9.69 | 92% | 135.1° |
| 2026-03-01 Sun | 18 | 47 | 8 | 04:55–05:00 (good, 0.08 h) | 71.1° 09:40 | 9.65 | 97% | 134.7° |
| 2026-03-02 Mon | 18 | 0 | 0 | — | 71.1° 09:40 | 9.6 | 100% | 131.1° |
| 2026-03-03 Tue | 18 | 99 | 18 | 04:45–05:20 (good, 0.58 h) | 71.1° 09:35 | 9.56 | 100% | 125.2° |
| 2026-03-04 Wed | 19 | 0 | 0 | — | 71.1° 09:30 | 9.51 | 98% | 117.9° |
| 2026-03-05 Thu | 18 | 100 | 18 | 04:40–05:20 (good, 0.67 h) | 71.1° 09:25 | 9.46 | 94% | 109.7° |
| 2026-03-06 Fri | 17 | 66 | 11 | 04:05–05:00 (marginal, 0.92 h) | 71.1° 09:25 | 9.41 | 88% | 101.2° |
| 2026-03-07 Sat | 17 | 82 | 14 | 04:40–05:00 (good, 0.33 h) | 71.1° 09:20 | 9.37 | 81% | 92.6° |
| 2026-03-08 Sun | 17 | 32 | 5 | 05:00–05:15 (marginal, 0.25 h) | 71.1° 09:15 | 9.32 | 72% | 84.0° |
| 2026-03-09 Mon | 17 | 89 | 15 | 04:45–05:00 (good, 0.25 h) | 71.1° 09:10 | 9.27 | 64% | 75.7° |
| 2026-03-10 Tue | 19 | 100 | 19 | 04:25–05:10 (good, 0.75 h) | 71.1° 09:05 | 9.22 | 54% | 67.8° |
| 2026-03-11 Wed | 21 | 52 | 11 | 04:15–05:00 (marginal, 0.75 h) | 71.1° 09:05 | 9.17 | 45% | 60.4° |
| 2026-03-12 Thu | 23 | 99 | 23 | 04:10–05:05 (good, 0.92 h) | 71.1° 09:00 | 9.13 | 36% | 53.9° |
| 2026-03-13 Fri | 28 | 100 | 28 | 03:55–05:05 (good, 1.17 h) | 71.1° 08:55 | 9.08 | 27% | 48.7° |
| 2026-03-14 Sat | 31 | 95 | 30 | 03:55–05:05 (good, 1.17 h) | 71.1° 08:50 | 9.03 | 18% | 45.4° |
| 2026-03-15 Sun | 32 | 100 | 32 | 03:45–05:00 (good, 1.25 h) | 71.1° 08:45 | 8.98 | 11% | 44.7° |
| 2026-03-16 Mon | 33 | 72 | 24 | 04:00–05:00 (good, 1.0 h) | 71.1° 08:45 | 8.93 | 5% | 47.0° |
| 2026-03-17 Tue | 35 | 0 | 0 | — | 71.1° 08:40 | 8.88 | 2% | 51.9° |
| 2026-03-18 Wed | 35 | 0 | 0 | — | 71.1° 08:35 | 8.82 | 0% | 59.0° |
| 2026-03-19 Thu | 36 | 0 | 0 | — | 71.1° 08:30 | 8.77 | 1% | 67.7° |
| 2026-03-20 Fri | 36 | 0 | 0 | — | 71.1° 08:30 | 8.72 | 5% | 77.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-02-19&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.