← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-02-27 Fri | 19 | 56 | 11 | 19:45–21:00 (marginal, 1.25 h) | 72.5° 17:40 | 9.74 | 85% | 54.4° |
| 2026-02-28 Sat | 24 | 100 | 24 | 19:45–22:50 (marginal, 3.08 h) | 72.5° 17:35 | 9.69 | 92% | 68.4° |
| 2026-03-01 Sun | 32 | 100 | 32 | 19:45–20:30 (good, 0.75 h) | 72.5° 17:30 | 9.65 | 97% | 82.2° |
| 2026-03-02 Mon | 41 | 27 | 11 | 19:45–21:00 (marginal, 1.25 h) | 72.5° 17:25 | 9.6 | 100% | 95.8° |
| 2026-03-03 Tue | 50 | 0 | 0 | — | 72.5° 17:25 | 9.56 | 100% | 109.2° |
| 2026-03-04 Wed | 58 | 1 | 0 | — | 72.5° 17:20 | 9.51 | 98% | 122.2° |
| 2026-03-05 Thu | 63 | 11 | 7 | 22:00–22:30 (marginal, 0.5 h) | 72.5° 17:15 | 9.46 | 94% | 135.0° |
| 2026-03-06 Fri | 63 | 67 | 42 | 19:50–21:00 (good, 1.17 h) | 72.5° 17:10 | 9.41 | 88% | 147.5° |
| 2026-03-07 Sat | 61 | 79 | 48 | 19:55–21:25 (good, 1.5 h) | 72.5° 17:10 | 9.37 | 81% | 159.7° |
| 2026-03-08 Sun | 59 | 59 | 35 | 21:00–21:55 (good, 0.92 h) | 72.5° 17:05 | 9.32 | 72% | 171.7° |
| 2026-03-09 Mon | 57 | 49 | 28 | 19:55–20:00 (good, 0.08 h) | 72.5° 17:00 | 9.27 | 64% | 176.2° |
| 2026-03-10 Tue | 55 | 99 | 55 | 19:55–22:05 (good, 2.17 h) | 72.5° 16:55 | 9.22 | 54% | 164.4° |
| 2026-03-11 Wed | 52 | 23 | 12 | 20:00–21:00 (marginal, 1.0 h) | 72.5° 16:50 | 9.17 | 45% | 152.6° |
| 2026-03-12 Thu | 50 | 0 | 0 | — | 72.5° 16:50 | 9.13 | 36% | 140.7° |
| 2026-03-13 Fri | 47 | 100 | 47 | 20:00–21:55 (good, 1.92 h) | 72.5° 16:45 | 9.08 | 27% | 128.5° |
| 2026-03-14 Sat | 46 | 100 | 46 | 20:00–21:50 (good, 1.83 h) | 72.5° 16:40 | 9.03 | 18% | 116.1° |
| 2026-03-15 Sun | 43 | 97 | 42 | 20:05–21:45 (good, 1.67 h) | 72.5° 16:35 | 8.98 | 11% | 103.4° |
| 2026-03-16 Mon | 42 | 2 | 1 | — | 72.5° 16:30 | 8.93 | 5% | 90.2° |
| 2026-03-17 Tue | 40 | 0 | 0 | — | 72.5° 16:30 | 8.88 | 2% | 76.8° |
| 2026-03-18 Wed | 38 | 0 | 0 | — | 72.5° 16:25 | 8.82 | 0% | 63.0° |
| 2026-03-19 Thu | 36 | 0 | 0 | — | 72.5° 16:20 | 8.77 | 1% | 48.9° |
| 2026-03-20 Fri | 33 | 0 | 0 | — | 72.5° 16:15 | 8.72 | 5% | 34.6° |
| 2026-03-21 Sat | 29 | 0 | 0 | — | 72.5° 16:15 | 8.67 | 11% | 20.1° |
| 2026-03-22 Sun | 24 | 0 | 0 | — | 72.5° 16:10 | 8.62 | 19% | 5.8° |
| 2026-03-23 Mon | 19 | 0 | 0 | — | 72.5° 16:05 | 8.57 | 29% | 8.8° |
| 2026-03-24 Tue | 14 | 0 | 0 | — | 72.5° 16:00 | 8.51 | 40% | 23.0° |
| 2026-03-25 Wed | 10 | 77 | 8 | 20:15–21:00 (marginal, 0.75 h) | 72.5° 15:55 | 8.46 | 52% | 37.1° |
| 2026-03-26 Thu | 8 | 90 | 7 | 20:15–21:20 (marginal, 1.08 h) | 72.5° 15:55 | 8.41 | 63% | 51.1° |
| 2026-03-27 Fri | 8 | 0 | 0 | — | 72.5° 15:50 | 8.35 | 73% | 64.8° |
| 2026-03-28 Sat | 8 | 35 | 3 | — | 72.5° 15:45 | 8.3 | 82% | 78.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-02-27&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.