← 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. |
|---|---|---|---|---|---|---|---|---|
| 2026-02-10 Tue | 100 | 0 | 0 | — | 72.5° 18:45 | 10.44 | 37% | 172.2° |
| 2026-02-11 Wed | 100 | 0 | 0 | — | 72.5° 18:40 | 10.4 | 28% | 160.4° |
| 2026-02-12 Thu | 100 | 0 | 0 | — | 72.5° 18:40 | 10.36 | 20% | 148.4° |
| 2026-02-13 Fri | 100 | 0 | 0 | — | 72.5° 18:35 | 10.32 | 13% | 136.3° |
| 2026-02-14 Sat | 100 | 16 | 16 | 23:00–00:00 (marginal, 1.0 h) | 72.5° 18:30 | 10.29 | 7% | 123.9° |
| 2026-02-15 Sun | 100 | 0 | 0 | — | 72.5° 18:25 | 10.25 | 3% | 111.3° |
| 2026-02-16 Mon | 100 | 13 | 13 | 19:30–20:00 (good, 0.5 h) | 72.5° 18:20 | 10.21 | 0% | 98.3° |
| 2026-02-17 Tue | 100 | 0 | 0 | — | 72.5° 18:20 | 10.17 | 0% | 85.1° |
| 2026-02-18 Wed | 100 | 97 | 97 | 19:35–23:25 (good, 3.83 h) | 72.5° 18:15 | 10.12 | 2% | 71.7° |
| 2026-02-19 Thu | 97 | 0 | 0 | — | 72.5° 18:10 | 10.08 | 7% | 58.0° |
| 2026-02-20 Fri | 88 | 0 | 0 | — | 72.5° 18:05 | 10.04 | 14% | 44.2° |
| 2026-02-21 Sat | 74 | 0 | 0 | — | 72.5° 18:05 | 10.0 | 22% | 30.2° |
| 2026-02-22 Sun | 58 | 34 | 20 | 19:40–20:00 (good, 0.33 h) | 72.5° 18:00 | 9.96 | 32% | 16.2° |
| 2026-02-23 Mon | 44 | 7 | 3 | — | 72.5° 17:55 | 9.91 | 43% | 2.3° |
| 2026-02-24 Tue | 31 | 66 | 20 | 21:00–23:20 (marginal, 2.33 h) | 72.5° 17:50 | 9.87 | 55% | 12.1° |
| 2026-02-25 Wed | 21 | 95 | 20 | 19:40–23:00 (marginal, 3.33 h) | 72.5° 17:45 | 9.83 | 66% | 26.2° |
| 2026-02-26 Thu | 18 | 94 | 17 | 19:45–22:45 (marginal, 3.0 h) | 72.5° 17:45 | 9.78 | 76% | 40.4° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2026-02-10&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.