← 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 | 41 | 0 | 0 | — | 89.5° 15:05 | 10.08 | 7% | 39.8° |
| 2026-02-20 Fri | 35 | 0 | 0 | — | 89.6° 15:05 | 10.04 | 14% | 32.3° |
| 2026-02-21 Sat | 29 | 0 | 0 | — | 89.7° 15:00 | 10.0 | 22% | 29.3° |
| 2026-02-22 Sun | 22 | 63 | 14 | 19:40–20:00 (good, 0.33 h) | 89.7° 14:55 | 9.96 | 32% | 32.1° |
| 2026-02-23 Mon | 18 | 15 | 3 | — | 89.6° 14:50 | 9.91 | 43% | 39.5° |
| 2026-02-24 Tue | 14 | 36 | 5 | 21:00–21:20 (marginal, 0.33 h) | 89.5° 14:50 | 9.87 | 55% | 49.6° |
| 2026-02-25 Wed | 12 | 100 | 12 | 19:40–21:15 (marginal, 1.58 h) | 89.6° 14:45 | 9.83 | 66% | 60.9° |
| 2026-02-26 Thu | 11 | 93 | 10 | 19:45–21:05 (marginal, 1.33 h) | 89.7° 14:40 | 9.78 | 76% | 72.8° |
| 2026-02-27 Fri | 12 | 90 | 11 | 19:45–21:00 (marginal, 1.25 h) | 89.7° 14:35 | 9.74 | 85% | 85.0° |
| 2026-02-28 Sat | 14 | 100 | 14 | 19:45–19:55 (good, 0.17 h) | 89.6° 14:30 | 9.69 | 92% | 97.2° |
| 2026-03-01 Sun | 16 | 100 | 16 | 19:45–20:15 (good, 0.5 h) | 89.5° 14:30 | 9.65 | 97% | 109.1° |
| 2026-03-02 Mon | 18 | 51 | 9 | 19:45–20:30 (marginal, 0.75 h) | 89.7° 14:25 | 9.6 | 100% | 120.6° |
| 2026-03-03 Tue | 17 | 0 | 0 | — | 89.7° 14:20 | 9.56 | 100% | 131.2° |
| 2026-03-04 Wed | 17 | 2 | 0 | — | 89.6° 14:15 | 9.51 | 98% | 140.4° |
| 2026-03-05 Thu | 18 | 0 | 0 | — | 89.5° 14:10 | 9.46 | 94% | 147.3° |
| 2026-03-06 Fri | 16 | 83 | 13 | 19:50–20:00 (good, 0.17 h) | 89.6° 14:10 | 9.41 | 88% | 150.6° |
| 2026-03-07 Sat | 13 | 82 | 11 | 19:55–20:00 (good, 0.08 h) | 89.7° 14:05 | 9.37 | 81% | 149.3° |
| 2026-03-08 Sun | 12 | 60 | 7 | 19:55–20:35 (marginal, 0.67 h) | 89.7° 14:00 | 9.32 | 72% | 144.1° |
| 2026-03-09 Mon | 11 | 42 | 5 | 19:55–20:00 (marginal, 0.08 h) | 89.6° 13:55 | 9.27 | 64% | 136.6° |
| 2026-03-10 Tue | 9 | 100 | 9 | 19:55–20:00 (good, 0.08 h) | 89.5° 13:55 | 9.22 | 54% | 127.8° |
| 2026-03-11 Wed | 7 | 48 | 3 | — | 89.6° 13:50 | 9.17 | 45% | 118.2° |
| 2026-03-12 Thu | 6 | 1 | 0 | — | 89.7° 13:45 | 9.13 | 36% | 108.1° |
| 2026-03-13 Fri | 5 | 100 | 5 | 20:00–20:20 (marginal, 0.33 h) | 89.7° 13:40 | 9.08 | 27% | 97.5° |
| 2026-03-14 Sat | 5 | 100 | 5 | 20:00–20:20 (marginal, 0.33 h) | 89.6° 13:35 | 9.03 | 18% | 86.7° |
| 2026-03-15 Sun | 3 | 100 | 3 | 20:05–20:15 (marginal, 0.17 h) | 89.5° 13:35 | 8.98 | 11% | 75.7° |
| 2026-03-16 Mon | 3 | 0 | 0 | — | 89.7° 13:30 | 8.93 | 5% | 64.5° |
| 2026-03-17 Tue | 2 | 0 | 0 | — | 89.7° 13:25 | 8.88 | 2% | 53.4° |
| 2026-03-18 Wed | 1 | 0 | 0 | — | 89.7° 13:20 | 8.82 | 0% | 43.1° |
| 2026-03-19 Thu | 1 | 0 | 0 | — | 89.5° 13:15 | 8.77 | 1% | 34.5° |
| 2026-03-20 Fri | 1 | 0 | 0 | — | 89.6° 13:15 | 8.72 | 5% | 29.7° |
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.