← 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. |
|---|---|---|---|---|---|---|---|---|
| 2030-02-19 Tue | 46 | — | unknown | 19:35–21:20 (good, 1.75 h) | 79.1° 16:00 | 10.08 | 96% | 138.4° |
| 2030-02-20 Wed | 45 | — | unknown | 19:35–21:20 (good, 1.75 h) | 79.1° 15:55 | 10.04 | 91% | 151.0° |
| 2030-02-21 Thu | 45 | — | unknown | 19:35–21:25 (good, 1.83 h) | 79.1° 15:50 | 10.0 | 83% | 161.3° |
| 2030-02-22 Fri | 42 | — | unknown | 19:40–21:20 (good, 1.67 h) | 79.1° 15:45 | 9.95 | 74% | 164.1° |
| 2030-02-23 Sat | 41 | — | unknown | 19:40–21:15 (good, 1.58 h) | 79.1° 15:45 | 9.91 | 63% | 156.4° |
| 2030-02-24 Sun | 38 | — | unknown | 19:40–21:10 (good, 1.5 h) | 79.1° 15:40 | 9.87 | 52% | 144.6° |
| 2030-02-25 Mon | 37 | — | unknown | 19:40–21:05 (good, 1.42 h) | 79.1° 15:35 | 9.82 | 40% | 131.8° |
| 2030-02-26 Tue | 34 | — | unknown | 19:45–21:05 (good, 1.33 h) | 79.1° 15:30 | 9.78 | 30% | 118.6° |
| 2030-02-27 Wed | 33 | — | unknown | 19:45–21:00 (good, 1.25 h) | 79.1° 15:25 | 9.74 | 20% | 105.5° |
| 2030-02-28 Thu | 31 | — | unknown | 19:45–20:55 (good, 1.17 h) | 79.1° 15:25 | 9.69 | 12% | 92.4° |
| 2030-03-01 Fri | 29 | — | unknown | 19:45–20:50 (good, 1.08 h) | 79.1° 15:20 | 9.65 | 6% | 79.4° |
| 2030-03-02 Sat | 27 | — | unknown | 19:45–20:45 (good, 1.0 h) | 79.1° 15:15 | 9.6 | 2% | 66.7° |
| 2030-03-03 Sun | 25 | — | unknown | 19:50–20:45 (good, 0.92 h) | 79.1° 15:10 | 9.55 | 0% | 54.4° |
| 2030-03-04 Mon | 24 | — | unknown | 19:50–20:40 (good, 0.83 h) | 79.1° 15:05 | 9.51 | 1% | 42.4° |
| 2030-03-05 Tue | 22 | — | unknown | 19:50–20:35 (good, 0.75 h) | 79.1° 15:05 | 9.46 | 3% | 31.3° |
| 2030-03-06 Wed | 20 | — | unknown | 19:50–20:30 (good, 0.67 h) | 79.1° 15:00 | 9.41 | 7% | 21.6° |
| 2030-03-07 Thu | 16 | — | unknown | 19:55–20:20 (good, 0.42 h) | 79.1° 14:55 | 9.37 | 13% | 15.9° |
| 2030-03-08 Fri | 14 | — | unknown | 19:55–20:15 (good, 0.33 h) | 79.1° 14:50 | 9.32 | 20% | 17.9° |
| 2030-03-09 Sat | 10 | — | unknown | 19:55–20:00 (good, 0.08 h) | 79.1° 14:50 | 9.27 | 28% | 25.8° |
| 2030-03-10 Sun | 8 | — | unknown | 19:55–20:45 (marginal, 0.83 h) | 79.1° 14:45 | 9.22 | 37% | 35.8° |
| 2030-03-11 Mon | 6 | — | unknown | 20:00–20:40 (marginal, 0.67 h) | 79.1° 14:40 | 9.17 | 46% | 46.6° |
| 2030-03-12 Tue | 4 | — | unknown | 20:00–20:30 (marginal, 0.5 h) | 79.1° 14:35 | 9.12 | 56% | 57.9° |
| 2030-03-13 Wed | 4 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 79.1° 14:30 | 9.07 | 65% | 69.6° |
| 2030-03-14 Thu | 3 | — | unknown | 20:00–20:25 (marginal, 0.42 h) | 79.1° 14:30 | 9.02 | 74% | 81.6° |
| 2030-03-15 Fri | 3 | — | unknown | 20:05–20:25 (marginal, 0.33 h) | 79.1° 14:25 | 8.97 | 83% | 94.0° |
| 2030-03-16 Sat | 3 | — | unknown | 20:05–20:20 (marginal, 0.25 h) | 79.1° 14:20 | 8.92 | 90% | 106.8° |
| 2030-03-17 Sun | 3 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.1° 14:15 | 8.87 | 96% | 119.9° |
| 2030-03-18 Mon | 2 | — | unknown | 20:05–20:15 (marginal, 0.17 h) | 79.1° 14:10 | 8.82 | 99% | 133.2° |
| 2030-03-19 Tue | 1 | — | unknown | — | 79.1° 14:10 | 8.77 | 100% | 146.3° |
| 2030-03-20 Wed | 1 | — | unknown | — | 79.1° 14:05 | 8.72 | 98% | 158.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2030-02-19&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.