← 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 | 44 | 0 | 0 | — | 87.1° 09:35 | 10.44 | 37% | 73.0° |
| 2026-02-11 Wed | 48 | 0 | 0 | — | 87.1° 09:30 | 10.4 | 28% | 69.8° |
| 2026-02-12 Thu | 53 | 0 | 0 | — | 87.1° 09:25 | 10.36 | 20% | 67.4° |
| 2026-02-13 Fri | 58 | 32 | 19 | 05:00–05:45 (marginal, 0.75 h) | 87.1° 09:20 | 10.32 | 13% | 66.1° |
| 2026-02-14 Sat | 60 | 0 | 0 | — | 87.1° 09:20 | 10.29 | 7% | 65.8° |
| 2026-02-15 Sun | 60 | 88 | 53 | 03:30–05:45 (good, 2.25 h) | 87.1° 09:15 | 10.25 | 3% | 66.8° |
| 2026-02-16 Mon | 62 | 0 | 0 | — | 87.1° 09:10 | 10.21 | 0% | 69.0° |
| 2026-02-17 Tue | 63 | 0 | 0 | — | 87.1° 09:05 | 10.17 | 0% | 72.4° |
| 2026-02-18 Wed | 65 | 100 | 65 | 03:10–05:40 (good, 2.5 h) | 87.1° 09:00 | 10.12 | 2% | 76.7° |
| 2026-02-19 Thu | 66 | 0 | 0 | — | 87.1° 09:00 | 10.08 | 7% | 81.8° |
| 2026-02-20 Fri | 67 | 0 | 0 | — | 87.1° 08:55 | 10.04 | 14% | 87.3° |
| 2026-02-21 Sat | 67 | 0 | 0 | — | 87.1° 08:50 | 10.0 | 22% | 93.0° |
| 2026-02-22 Sun | 69 | 1 | 1 | — | 87.1° 08:45 | 9.96 | 32% | 98.6° |
| 2026-02-23 Mon | 71 | 12 | 8 | 05:00–05:35 (marginal, 0.58 h) | 87.1° 08:40 | 9.91 | 43% | 103.8° |
| 2026-02-24 Tue | 71 | 25 | 18 | 02:30–04:00 (marginal, 1.5 h) | 87.1° 08:40 | 9.87 | 55% | 108.2° |
| 2026-02-25 Wed | 71 | 0 | 0 | — | 87.1° 08:35 | 9.83 | 66% | 111.6° |
| 2026-02-26 Thu | 70 | 63 | 44 | 02:15–05:30 (marginal, 3.25 h) | 87.1° 08:30 | 9.78 | 76% | 113.6° |
| 2026-02-27 Fri | 69 | 96 | 66 | 02:45–05:30 (good, 2.75 h) | 87.1° 08:25 | 9.74 | 85% | 114.2° |
| 2026-02-28 Sat | 60 | 100 | 60 | 02:45–05:25 (good, 2.67 h) | 87.1° 08:25 | 9.69 | 92% | 113.2° |
| 2026-03-01 Sun | 57 | 78 | 44 | 02:45–05:00 (good, 2.25 h) | 87.1° 08:20 | 9.65 | 97% | 110.9° |
| 2026-03-02 Mon | 54 | 0 | 0 | — | 87.1° 08:15 | 9.6 | 100% | 107.3° |
| 2026-03-03 Tue | 51 | 97 | 50 | 02:45–05:20 (good, 2.58 h) | 87.1° 08:10 | 9.56 | 100% | 103.0° |
| 2026-03-04 Wed | 48 | 0 | 0 | — | 87.1° 08:05 | 9.51 | 98% | 98.1° |
| 2026-03-05 Thu | 48 | 99 | 47 | 03:00–05:20 (good, 2.33 h) | 87.1° 08:05 | 9.46 | 94% | 93.0° |
| 2026-03-06 Fri | 47 | 71 | 33 | 03:35–04:00 (good, 0.42 h) | 87.1° 08:00 | 9.41 | 88% | 87.9° |
| 2026-03-07 Sat | 49 | 92 | 45 | 02:30–05:00 (good, 2.5 h) | 87.1° 07:55 | 9.37 | 81% | 83.0° |
| 2026-03-08 Sun | 51 | 20 | 10 | 05:00–05:15 (good, 0.25 h) | 87.1° 07:50 | 9.32 | 72% | 78.4° |
| 2026-03-09 Mon | 55 | 58 | 32 | 04:00–05:10 (good, 1.17 h) | 87.1° 07:45 | 9.27 | 64% | 74.3° |
| 2026-03-10 Tue | 62 | 100 | 62 | 01:50–05:10 (good, 3.33 h) | 87.1° 07:45 | 9.22 | 54% | 70.8° |
| 2026-03-11 Wed | 69 | 36 | 25 | 03:00–05:10 (marginal, 2.17 h) | 87.1° 07:40 | 9.17 | 45% | 68.2° |
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.