← 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. |
|---|---|---|---|---|---|---|---|---|
| 2029-04-21 Sat | 0 | — | unknown | — | 89.6° 12:05 | 6.93 | 51% | 95.8° |
| 2029-04-22 Sun | 0 | — | unknown | — | 89.6° 12:00 | 6.87 | 62% | 107.7° |
| 2029-04-23 Mon | 0 | — | unknown | — | 89.7° 11:55 | 6.81 | 73% | 119.6° |
| 2029-04-24 Tue | 0 | — | unknown | — | 89.7° 11:50 | 6.75 | 82% | 131.3° |
| 2029-04-25 Wed | 0 | — | unknown | — | 89.6° 11:45 | 6.7 | 90% | 141.8° |
| 2029-04-26 Thu | 1 | — | unknown | — | 89.5° 11:45 | 6.64 | 96% | 149.4° |
| 2029-04-27 Fri | 1 | — | unknown | — | 89.7° 11:40 | 6.58 | 99% | 151.1° |
| 2029-04-28 Sat | 1 | — | unknown | — | 89.7° 11:35 | 6.52 | 100% | 146.1° |
| 2029-04-29 Sun | 1 | — | unknown | — | 89.7° 11:30 | 6.46 | 97% | 136.8° |
| 2029-04-30 Mon | 1 | — | unknown | — | 89.5° 11:25 | 6.41 | 91% | 125.5° |
| 2029-05-01 Tue | 1 | — | unknown | — | 89.6° 11:25 | 6.35 | 84% | 113.7° |
| 2029-05-02 Wed | 1 | — | unknown | — | 89.7° 11:20 | 6.29 | 75% | 101.9° |
| 2029-05-03 Thu | 1 | — | unknown | — | 89.7° 11:15 | 6.23 | 65% | 90.3° |
| 2029-05-04 Fri | 1 | — | unknown | — | 89.6° 11:10 | 6.17 | 55% | 79.0° |
| 2029-05-05 Sat | 1 | — | unknown | — | 89.5° 11:10 | 6.12 | 45% | 68.2° |
| 2029-05-06 Sun | 1 | — | unknown | — | 89.6° 11:05 | 6.06 | 35% | 58.0° |
| 2029-05-07 Mon | 1 | — | unknown | — | 89.7° 11:00 | 6.0 | 26% | 48.4° |
| 2029-05-08 Tue | 2 | — | unknown | — | 89.7° 10:55 | 5.95 | 19% | 39.8° |
| 2029-05-09 Wed | 2 | — | unknown | 04:55–05:00 (marginal, 0.08 h) | 89.6° 10:50 | 5.89 | 12% | 33.0° |
| 2029-05-10 Thu | 3 | — | unknown | 04:45–05:00 (marginal, 0.25 h) | 89.5° 10:50 | 5.83 | 6% | 29.0° |
| 2029-05-11 Fri | 4 | — | unknown | 04:40–04:55 (marginal, 0.25 h) | 89.7° 10:45 | 5.78 | 3% | 29.3° |
| 2029-05-12 Sat | 4 | — | unknown | 04:35–04:55 (marginal, 0.33 h) | 89.7° 10:40 | 5.72 | 0% | 33.6° |
| 2029-05-13 Sun | 4 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.7° 10:35 | 5.67 | 0% | 40.9° |
| 2029-05-14 Mon | 5 | — | unknown | 04:30–04:55 (marginal, 0.42 h) | 89.5° 10:30 | 5.62 | 2% | 49.9° |
| 2029-05-15 Tue | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 89.6° 10:30 | 5.56 | 5% | 59.9° |
| 2029-05-16 Wed | 6 | — | unknown | 04:20–04:50 (marginal, 0.5 h) | 89.7° 10:25 | 5.51 | 11% | 70.6° |
| 2029-05-17 Thu | 6 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.7° 10:20 | 5.46 | 18% | 81.7° |
| 2029-05-18 Fri | 7 | — | unknown | 04:15–04:50 (marginal, 0.58 h) | 89.6° 10:15 | 5.41 | 26% | 93.1° |
| 2029-05-19 Sat | 7 | — | unknown | 04:10–04:45 (marginal, 0.58 h) | 89.5° 10:10 | 5.36 | 36% | 104.7° |
| 2029-05-20 Sun | 8 | — | unknown | 04:05–04:45 (marginal, 0.67 h) | 89.6° 10:10 | 5.31 | 47% | 116.4° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2029-04-21&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.