← 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. |
|---|---|---|---|---|---|---|---|---|
| 2043-04-14 Tue | 0 | — | unknown | — | 89.7° 12:35 | 7.36 | 34% | 68.7° |
| 2043-04-15 Wed | 0 | — | unknown | — | 89.5° 12:30 | 7.3 | 45% | 80.3° |
| 2043-04-16 Thu | 0 | — | unknown | — | 89.7° 12:30 | 7.24 | 55% | 91.7° |
| 2043-04-17 Fri | 0 | — | unknown | — | 89.8° 12:25 | 7.18 | 66% | 102.8° |
| 2043-04-18 Sat | 0 | — | unknown | — | 89.8° 12:20 | 7.13 | 75% | 113.4° |
| 2043-04-19 Sun | 0 | — | unknown | — | 89.6° 12:15 | 7.07 | 83% | 123.5° |
| 2043-04-20 Mon | 0 | — | unknown | — | 89.5° 12:15 | 7.01 | 90% | 132.6° |
| 2043-04-21 Tue | 0 | — | unknown | — | 89.7° 12:10 | 6.95 | 95% | 140.5° |
| 2043-04-22 Wed | 0 | — | unknown | — | 89.8° 12:05 | 6.89 | 98% | 146.1° |
| 2043-04-23 Thu | 0 | — | unknown | — | 89.7° 12:00 | 6.84 | 100% | 148.5° |
| 2043-04-24 Fri | 0 | — | unknown | — | 89.6° 11:55 | 6.78 | 100% | 147.0° |
| 2043-04-25 Sat | 0 | — | unknown | — | 89.8° 11:50 | 6.72 | 98% | 142.1° |
| 2043-04-26 Sun | 0 | — | unknown | — | 89.8° 11:45 | 6.66 | 94% | 134.8° |
| 2043-04-27 Mon | 1 | — | unknown | — | 89.7° 11:40 | 6.6 | 88% | 126.2° |
| 2043-04-28 Tue | 1 | — | unknown | — | 89.5° 11:35 | 6.54 | 82% | 116.8° |
| 2043-04-29 Wed | 1 | — | unknown | — | 89.6° 11:35 | 6.49 | 74% | 106.8° |
| 2043-04-30 Thu | 1 | — | unknown | — | 89.8° 11:30 | 6.43 | 64% | 96.4° |
| 2043-05-01 Fri | 1 | — | unknown | — | 89.8° 11:25 | 6.37 | 55% | 85.7° |
| 2043-05-02 Sat | 1 | — | unknown | — | 89.6° 11:20 | 6.31 | 44% | 74.7° |
| 2043-05-03 Sun | 1 | — | unknown | — | 89.5° 11:20 | 6.25 | 34% | 63.7° |
| 2043-05-04 Mon | 1 | — | unknown | — | 89.7° 11:15 | 6.2 | 24% | 52.8° |
| 2043-05-05 Tue | 1 | — | unknown | — | 89.8° 11:10 | 6.14 | 15% | 42.7° |
| 2043-05-06 Wed | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.7° 11:05 | 6.08 | 7% | 34.9° |
| 2043-05-07 Thu | 2 | — | unknown | 05:00–05:05 (marginal, 0.08 h) | 89.6° 11:00 | 6.03 | 2% | 31.5° |
| 2043-05-08 Fri | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.6° 11:00 | 5.97 | 0% | 34.3° |
| 2043-05-09 Sat | 2 | — | unknown | 04:50–05:00 (marginal, 0.17 h) | 89.7° 10:55 | 5.91 | 1% | 42.2° |
| 2043-05-10 Sun | 2 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.8° 10:50 | 5.86 | 5% | 52.7° |
| 2043-05-11 Mon | 3 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.7° 10:45 | 5.8 | 12% | 64.4° |
| 2043-05-12 Tue | 3 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.5° 10:40 | 5.75 | 20% | 76.4° |
| 2043-05-13 Wed | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.6° 10:40 | 5.69 | 30% | 88.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2043-04-14&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.