← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-02-18 Wed | 93 | 100 | 93 | 23:10–05:40 (good, 6.5 h) | 50.2° 02:55 | 10.12 | 2% | 161.3° |
| 2026-02-19 Thu | 93 | 0 | 0 | — | 50.2° 02:50 | 10.08 | 7% | 172.0° |
| 2026-02-20 Fri | 93 | 0 | 0 | — | 50.2° 02:50 | 10.04 | 14% | 167.6° |
| 2026-02-21 Sat | 93 | 0 | 0 | — | 50.2° 02:45 | 10.0 | 22% | 154.9° |
| 2026-02-22 Sun | 93 | 0 | 0 | — | 50.2° 02:40 | 9.96 | 32% | 141.2° |
| 2026-02-23 Mon | 93 | 5 | 4 | 05:00–05:35 (marginal, 0.58 h) | 50.2° 02:35 | 9.91 | 43% | 127.3° |
| 2026-02-24 Tue | 93 | 61 | 57 | 22:55–02:00 (good, 3.08 h) | 50.2° 02:30 | 9.87 | 55% | 113.3° |
| 2026-02-25 Wed | 91 | 9 | 9 | 22:15–23:00 (marginal, 0.75 h) | 50.2° 02:30 | 9.83 | 66% | 99.3° |
| 2026-02-26 Thu | 87 | 76 | 66 | 01:00–02:00 (good, 1.0 h) | 50.2° 02:25 | 9.78 | 76% | 85.3° |
| 2026-02-27 Fri | 82 | 82 | 67 | 02:00–05:00 (good, 3.0 h) | 50.2° 02:20 | 9.74 | 85% | 71.3° |
| 2026-02-28 Sat | 52 | 100 | 52 | 22:40–05:25 (marginal, 6.75 h) | 50.2° 02:15 | 9.69 | 92% | 57.5° |
| 2026-03-01 Sun | 35 | 89 | 31 | 23:40–05:00 (marginal, 5.33 h) | 50.2° 02:10 | 9.65 | 97% | 43.9° |
| 2026-03-02 Mon | 23 | 0 | 0 | — | 50.2° 02:10 | 9.6 | 100% | 30.6° |
| 2026-03-03 Tue | 21 | 58 | 12 | 02:40–05:20 (marginal, 2.67 h) | 50.2° 02:05 | 9.56 | 100% | 17.9° |
| 2026-03-04 Wed | 23 | 0 | 0 | — | 50.2° 02:00 | 9.51 | 98% | 7.9° |
| 2026-03-05 Thu | 29 | 84 | 24 | 00:00–05:20 (marginal, 5.33 h) | 50.2° 01:55 | 9.46 | 94% | 11.8° |
| 2026-03-06 Fri | 42 | 45 | 19 | 03:00–05:00 (marginal, 2.0 h) | 50.2° 01:55 | 9.41 | 88% | 23.0° |
| 2026-03-07 Sat | 82 | 95 | 78 | 22:05–22:55 (good, 0.83 h) | 50.2° 01:50 | 9.37 | 81% | 34.8° |
| 2026-03-08 Sun | 89 | 13 | 12 | 21:30–22:00 (marginal, 0.5 h) | 50.2° 01:45 | 9.32 | 72% | 46.6° |
| 2026-03-09 Mon | 93 | 62 | 57 | 23:50–01:00 (good, 1.17 h) | 50.2° 01:40 | 9.27 | 64% | 58.4° |
| 2026-03-10 Tue | 93 | 100 | 93 | 21:50–05:10 (good, 7.33 h) | 50.2° 01:35 | 9.22 | 54% | 70.1° |
| 2026-03-11 Wed | 93 | 16 | 15 | 03:00–05:00 (marginal, 2.0 h) | 50.2° 01:35 | 9.17 | 45% | 81.8° |
| 2026-03-12 Thu | 93 | 41 | 38 | 02:00–05:05 (good, 3.08 h) | 50.2° 01:30 | 9.13 | 36% | 93.7° |
| 2026-03-13 Fri | 93 | 100 | 93 | 21:40–05:05 (good, 7.42 h) | 50.2° 01:25 | 9.08 | 27% | 105.7° |
| 2026-03-14 Sat | 93 | 66 | 61 | 02:00–05:00 (good, 3.0 h) | 50.2° 01:20 | 9.03 | 18% | 118.1° |
| 2026-03-15 Sun | 93 | 90 | 83 | 21:35–05:00 (good, 7.42 h) | 50.2° 01:15 | 8.98 | 11% | 130.7° |
| 2026-03-16 Mon | 93 | 43 | 40 | 03:00–05:00 (good, 2.0 h) | 50.2° 01:15 | 8.93 | 5% | 143.5° |
| 2026-03-17 Tue | 93 | 0 | 0 | — | 50.2° 01:10 | 8.88 | 2% | 156.6° |
| 2026-03-18 Wed | 93 | 0 | 0 | — | 50.2° 01:05 | 8.82 | 0% | 168.9° |
| 2026-03-19 Thu | 93 | 0 | 0 | — | 50.2° 01:00 | 8.77 | 1% | 171.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-02-18&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.