← 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. |
|---|---|---|---|---|---|---|---|---|
| 2036-06-20 Fri | 22 | — | unknown | 23:15–23:45 (good, 0.5 h) | 50.2° 19:55 | 4.42 | 14% | 139.1° |
| 2036-06-21 Sat | 20 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.2° 19:50 | 4.42 | 7% | 125.1° |
| 2036-06-22 Sun | 18 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.2° 19:45 | 4.43 | 2% | 110.7° |
| 2036-06-23 Mon | 16 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:40 | 4.43 | 0% | 95.9° |
| 2036-06-24 Tue | 15 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.2° 19:40 | 4.44 | 1% | 81.0° |
| 2036-06-25 Wed | 14 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.2° 19:35 | 4.45 | 5% | 65.9° |
| 2036-06-26 Thu | 12 | — | unknown | 23:15–23:20 (good, 0.08 h) | 50.2° 19:30 | 4.46 | 11% | 51.0° |
| 2036-06-27 Fri | 9 | — | unknown | 22:20–23:10 (marginal, 0.83 h) | 50.2° 19:25 | 4.48 | 20% | 36.2° |
| 2036-06-28 Sat | 8 | — | unknown | 23:10–23:45 (marginal, 0.58 h) | 50.2° 19:25 | 4.49 | 30% | 21.8° |
| 2036-06-29 Sun | 6 | — | unknown | 23:10–23:40 (marginal, 0.5 h) | 50.2° 19:20 | 4.51 | 41% | 7.8° |
| 2036-06-30 Mon | 4 | — | unknown | 23:10–23:30 (marginal, 0.33 h) | 50.2° 19:15 | 4.53 | 52% | 6.0° |
| 2036-07-01 Tue | 3 | — | unknown | 23:10–23:20 (marginal, 0.17 h) | 50.2° 19:10 | 4.55 | 63% | 19.3° |
| 2036-07-02 Wed | 2 | — | unknown | — | 50.2° 19:05 | 4.57 | 72% | 32.4° |
| 2036-07-03 Thu | 2 | — | unknown | — | 50.2° 19:05 | 4.6 | 81% | 45.1° |
| 2036-07-04 Fri | 2 | — | unknown | — | 50.2° 19:00 | 4.63 | 88% | 57.7° |
| 2036-07-05 Sat | 2 | — | unknown | — | 50.2° 18:55 | 4.65 | 94% | 70.1° |
| 2036-07-06 Sun | 2 | — | unknown | — | 50.2° 18:50 | 4.69 | 98% | 82.3° |
| 2036-07-07 Mon | 2 | — | unknown | — | 50.2° 18:45 | 4.72 | 100% | 94.3° |
| 2036-07-08 Tue | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:45 | 4.75 | 100% | 106.3° |
| 2036-07-09 Wed | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:40 | 4.79 | 98% | 118.1° |
| 2036-07-10 Thu | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:35 | 4.82 | 95% | 130.0° |
| 2036-07-11 Fri | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:30 | 4.86 | 90% | 141.8° |
| 2036-07-12 Sat | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.2° 18:30 | 4.9 | 83% | 153.7° |
| 2036-07-13 Sun | 2 | — | unknown | — | 50.2° 18:25 | 4.94 | 75% | 165.7° |
| 2036-07-14 Mon | 1 | — | unknown | — | 50.2° 18:20 | 4.98 | 66% | 177.7° |
| 2036-07-15 Tue | 1 | — | unknown | — | 50.2° 18:15 | 5.02 | 57% | 169.8° |
| 2036-07-16 Wed | 1 | — | unknown | — | 50.2° 18:10 | 5.07 | 47% | 157.1° |
| 2036-07-17 Thu | 1 | — | unknown | — | 50.2° 18:10 | 5.11 | 36% | 144.1° |
| 2036-07-18 Fri | 1 | — | unknown | — | 50.2° 18:05 | 5.16 | 26% | 130.7° |
| 2036-07-19 Sat | 1 | — | unknown | — | 50.2° 18:00 | 5.2 | 17% | 116.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2036-06-20&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.