← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-06-19 Tue | 8 | — | unknown | 23:10–00:05 (marginal, 0.92 h) | 50.1° 20:00 | 4.42 | 71% | 17.8° |
| 2040-06-20 Wed | 6 | — | unknown | 23:15–23:50 (marginal, 0.58 h) | 50.1° 19:55 | 4.42 | 80% | 31.5° |
| 2040-06-21 Thu | 6 | — | unknown | 23:15–23:50 (marginal, 0.58 h) | 50.1° 19:50 | 4.42 | 88% | 45.6° |
| 2040-06-22 Fri | 6 | — | unknown | 23:15–23:50 (marginal, 0.58 h) | 50.1° 19:45 | 4.43 | 95% | 60.1° |
| 2040-06-23 Sat | 7 | — | unknown | 23:15–23:55 (marginal, 0.67 h) | 50.1° 19:40 | 4.43 | 99% | 75.0° |
| 2040-06-24 Sun | 9 | — | unknown | 23:15–00:00 (marginal, 0.75 h) | 50.1° 19:40 | 4.44 | 100% | 90.2° |
| 2040-06-25 Mon | 10 | — | unknown | 23:15–23:55 (marginal, 0.67 h) | 50.1° 19:35 | 4.45 | 98% | 105.4° |
| 2040-06-26 Tue | 11 | — | unknown | 22:20–23:50 (marginal, 1.5 h) | 50.1° 19:30 | 4.46 | 93% | 120.5° |
| 2040-06-27 Wed | 11 | — | unknown | 23:15–23:20 (good, 0.08 h) | 50.1° 19:25 | 4.48 | 86% | 135.4° |
| 2040-06-28 Thu | 11 | — | unknown | 23:10–23:15 (good, 0.08 h) | 50.1° 19:25 | 4.49 | 76% | 149.9° |
| 2040-06-29 Fri | 10 | — | unknown | 22:20–23:40 (marginal, 1.33 h) | 50.1° 19:20 | 4.51 | 66% | 164.0° |
| 2040-06-30 Sat | 8 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.1° 19:15 | 4.53 | 55% | 177.7° |
| 2040-07-01 Sun | 7 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.1° 19:10 | 4.55 | 45% | 169.0° |
| 2040-07-02 Mon | 6 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.1° 19:05 | 4.57 | 34% | 156.1° |
| 2040-07-03 Tue | 6 | — | unknown | 22:20–22:55 (marginal, 0.58 h) | 50.1° 19:05 | 4.6 | 25% | 143.5° |
| 2040-07-04 Wed | 5 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.1° 19:00 | 4.63 | 17% | 131.2° |
| 2040-07-05 Thu | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 18:55 | 4.66 | 10% | 119.0° |
| 2040-07-06 Fri | 3 | — | unknown | 22:15–22:45 (marginal, 0.5 h) | 50.1° 18:50 | 4.69 | 5% | 107.0° |
| 2040-07-07 Sat | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:45 | 4.72 | 2% | 95.0° |
| 2040-07-08 Sun | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:45 | 4.75 | 0% | 83.2° |
| 2040-07-09 Mon | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.1° 18:40 | 4.79 | 0% | 71.4° |
| 2040-07-10 Tue | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.82 | 2% | 59.5° |
| 2040-07-11 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:30 | 4.86 | 6% | 47.7° |
| 2040-07-12 Thu | 2 | — | unknown | — | 50.1° 18:30 | 4.9 | 11% | 35.7° |
| 2040-07-13 Fri | 1 | — | unknown | — | 50.1° 18:25 | 4.94 | 18% | 23.7° |
| 2040-07-14 Sat | 1 | — | unknown | — | 50.1° 18:20 | 4.98 | 26% | 11.5° |
| 2040-07-15 Sun | 1 | — | unknown | — | 50.1° 18:15 | 5.02 | 35% | 1.1° |
| 2040-07-16 Mon | 1 | — | unknown | — | 50.1° 18:10 | 5.07 | 45% | 13.7° |
| 2040-07-17 Tue | 0 | — | unknown | — | 50.1° 18:10 | 5.11 | 56% | 26.8° |
| 2040-07-18 Wed | 0 | — | unknown | — | 50.1° 18:05 | 5.16 | 66% | 40.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-06-19&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.