← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-02-13 Fri | 13 | 59 | 8 | 05:20–05:45 (marginal, 0.42 h) | 87.3° 11:45 | 10.32 | 13% | 76.2° |
| 2026-02-14 Sat | 15 | 0 | 0 | — | 87.3° 11:40 | 10.29 | 7% | 70.3° |
| 2026-02-15 Sun | 16 | 88 | 14 | 05:35–05:45 (good, 0.17 h) | 87.3° 11:35 | 10.25 | 3% | 65.0° |
| 2026-02-16 Mon | 17 | 0 | 0 | — | 87.3° 11:30 | 10.21 | 0% | 60.7° |
| 2026-02-17 Tue | 17 | 0 | 0 | — | 87.3° 11:25 | 10.17 | 0% | 57.9° |
| 2026-02-18 Wed | 18 | 100 | 18 | 05:10–05:40 (good, 0.5 h) | 87.3° 11:25 | 10.12 | 2% | 57.0° |
| 2026-02-19 Thu | 20 | 0 | 0 | — | 87.3° 11:20 | 10.08 | 7% | 58.1° |
| 2026-02-20 Fri | 21 | 0 | 0 | — | 87.3° 11:15 | 10.04 | 14% | 61.3° |
| 2026-02-21 Sat | 21 | 0 | 0 | — | 87.3° 11:10 | 10.0 | 22% | 66.1° |
| 2026-02-22 Sun | 21 | 2 | 0 | — | 87.3° 11:10 | 9.96 | 32% | 72.3° |
| 2026-02-23 Mon | 23 | 25 | 6 | 05:00–05:35 (marginal, 0.58 h) | 87.3° 11:05 | 9.91 | 43% | 79.3° |
| 2026-02-24 Tue | 23 | 7 | 2 | — | 87.3° 11:00 | 9.87 | 55% | 86.9° |
| 2026-02-25 Wed | 24 | 0 | 0 | — | 87.3° 10:55 | 9.83 | 66% | 94.6° |
| 2026-02-26 Thu | 25 | 58 | 15 | 04:30–05:30 (marginal, 1.0 h) | 87.3° 10:50 | 9.78 | 76% | 102.0° |
| 2026-02-27 Fri | 24 | 94 | 23 | 04:50–05:30 (good, 0.67 h) | 87.3° 10:50 | 9.74 | 85% | 109.0° |
| 2026-02-28 Sat | 21 | 100 | 21 | 04:40–05:25 (good, 0.75 h) | 87.3° 10:45 | 9.69 | 92% | 114.9° |
| 2026-03-01 Sun | 22 | 56 | 12 | 04:45–05:00 (good, 0.25 h) | 87.3° 10:40 | 9.65 | 97% | 119.4° |
| 2026-03-02 Mon | 23 | 0 | 0 | — | 87.3° 10:35 | 9.6 | 100% | 122.2° |
| 2026-03-03 Tue | 23 | 99 | 23 | 04:30–05:20 (good, 0.83 h) | 87.3° 10:30 | 9.56 | 100% | 123.0° |
| 2026-03-04 Wed | 23 | 0 | 0 | — | 87.3° 10:30 | 9.51 | 98% | 121.8° |
| 2026-03-05 Thu | 24 | 100 | 24 | 04:25–05:20 (good, 0.92 h) | 87.3° 10:25 | 9.46 | 94% | 119.0° |
| 2026-03-06 Fri | 24 | 70 | 17 | 03:30–05:15 (marginal, 1.75 h) | 87.3° 10:20 | 9.41 | 88% | 114.8° |
| 2026-03-07 Sat | 24 | 85 | 20 | 04:20–05:00 (good, 0.67 h) | 87.3° 10:15 | 9.37 | 81% | 109.6° |
| 2026-03-08 Sun | 24 | 27 | 7 | 05:00–05:15 (good, 0.25 h) | 87.3° 10:15 | 9.32 | 72% | 103.8° |
| 2026-03-09 Mon | 25 | 85 | 21 | 04:20–05:10 (good, 0.83 h) | 87.3° 10:10 | 9.27 | 64% | 97.6° |
| 2026-03-10 Tue | 26 | 100 | 26 | 04:05–05:10 (good, 1.08 h) | 87.3° 10:05 | 9.22 | 54% | 91.2° |
| 2026-03-11 Wed | 28 | 55 | 15 | 03:20–05:10 (marginal, 1.83 h) | 87.3° 10:00 | 9.17 | 45% | 84.8° |
| 2026-03-12 Thu | 30 | 98 | 29 | 04:00–05:05 (good, 1.08 h) | 87.3° 09:55 | 9.13 | 36% | 78.5° |
| 2026-03-13 Fri | 34 | 100 | 34 | 03:40–05:05 (good, 1.42 h) | 87.3° 09:55 | 9.08 | 27% | 72.4° |
| 2026-03-14 Sat | 37 | 95 | 35 | 03:40–05:05 (good, 1.42 h) | 87.3° 09:50 | 9.03 | 18% | 66.9° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-02-13&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.