← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-01-21 Tue | 0 | — | unknown | — | 71.1° 12:20 | 11.08 | 0% | 47.5° |
| 2042-01-22 Wed | 0 | — | unknown | — | 71.1° 12:15 | 11.05 | 2% | 47.7° |
| 2042-01-23 Thu | 0 | — | unknown | — | 71.1° 12:10 | 11.03 | 6% | 51.3° |
| 2042-01-24 Fri | 0 | — | unknown | — | 71.1° 12:10 | 11.0 | 13% | 57.5° |
| 2042-01-25 Sat | 0 | — | unknown | — | 71.1° 12:00 | 10.97 | 22% | 65.5° |
| 2042-01-26 Sun | 0 | — | unknown | — | 71.1° 12:00 | 10.94 | 32% | 74.5° |
| 2042-01-27 Mon | 1 | — | unknown | — | 71.1° 11:50 | 10.91 | 43% | 83.9° |
| 2042-01-28 Tue | 1 | — | unknown | — | 71.1° 11:50 | 10.88 | 55% | 93.3° |
| 2042-01-29 Wed | 1 | — | unknown | — | 71.1° 11:45 | 10.85 | 65% | 102.4° |
| 2042-01-30 Thu | 1 | — | unknown | — | 71.1° 11:40 | 10.82 | 75% | 111.0° |
| 2042-01-31 Fri | 1 | — | unknown | — | 71.1° 11:35 | 10.79 | 83% | 118.6° |
| 2042-02-01 Sat | 1 | — | unknown | — | 71.1° 11:35 | 10.75 | 90% | 125.1° |
| 2042-02-02 Sun | 1 | — | unknown | — | 71.1° 11:30 | 10.72 | 95% | 129.8° |
| 2042-02-03 Mon | 2 | — | unknown | 05:55–06:00 (marginal, 0.08 h) | 71.1° 11:25 | 10.69 | 98% | 132.5° |
| 2042-02-04 Tue | 2 | — | unknown | 05:50–05:55 (marginal, 0.08 h) | 71.1° 11:20 | 10.65 | 100% | 132.7° |
| 2042-02-05 Wed | 2 | — | unknown | 05:50–05:55 (marginal, 0.08 h) | 71.1° 11:15 | 10.62 | 99% | 130.5° |
| 2042-02-06 Thu | 3 | — | unknown | 05:45–05:55 (marginal, 0.17 h) | 71.1° 11:15 | 10.58 | 97% | 126.4° |
| 2042-02-07 Fri | 3 | — | unknown | 05:40–05:55 (marginal, 0.25 h) | 71.1° 11:10 | 10.55 | 93% | 120.8° |
| 2042-02-08 Sat | 4 | — | unknown | 05:35–05:55 (marginal, 0.33 h) | 71.1° 11:05 | 10.51 | 87% | 114.2° |
| 2042-02-09 Sun | 3 | — | unknown | 05:35–05:50 (marginal, 0.25 h) | 71.1° 11:00 | 10.47 | 80% | 106.9° |
| 2042-02-10 Mon | 4 | — | unknown | 05:30–05:50 (marginal, 0.33 h) | 71.1° 10:55 | 10.44 | 72% | 99.1° |
| 2042-02-11 Tue | 4 | — | unknown | 05:25–05:50 (marginal, 0.42 h) | 71.1° 10:55 | 10.4 | 63% | 91.0° |
| 2042-02-12 Wed | 5 | — | unknown | 05:20–05:50 (marginal, 0.5 h) | 71.1° 10:50 | 10.36 | 54% | 82.7° |
| 2042-02-13 Thu | 6 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:45 | 10.32 | 44% | 74.5° |
| 2042-02-14 Fri | 7 | — | unknown | 05:15–05:45 (marginal, 0.5 h) | 71.1° 10:40 | 10.28 | 34% | 66.5° |
| 2042-02-15 Sat | 8 | — | unknown | 05:10–06:15 (marginal, 1.08 h) | 71.1° 10:40 | 10.24 | 24% | 59.1° |
| 2042-02-16 Sun | 10 | — | unknown | 05:30–05:45 (good, 0.25 h) | 71.1° 10:35 | 10.2 | 15% | 52.8° |
| 2042-02-17 Mon | 11 | — | unknown | 05:30–05:40 (good, 0.17 h) | 71.1° 10:30 | 10.16 | 8% | 48.5° |
| 2042-02-18 Tue | 12 | — | unknown | 05:25–05:40 (good, 0.25 h) | 71.1° 10:25 | 10.12 | 3% | 47.2° |
| 2042-02-19 Wed | 13 | — | unknown | 05:20–05:40 (good, 0.33 h) | 71.1° 10:20 | 10.08 | 0% | 49.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-01-21&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.