← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-06-26 Sat | 13 | — | unknown | 23:15–23:25 (good, 0.17 h) | 50.2° 19:35 | 4.45 | 53% | 170.4° |
| 2027-06-27 Sun | 12 | — | unknown | 23:15–23:20 (good, 0.08 h) | 50.2° 19:30 | 4.46 | 43% | 167.2° |
| 2027-06-28 Mon | 11 | — | unknown | 22:20–23:45 (marginal, 1.42 h) | 50.2° 19:25 | 4.48 | 32% | 156.2° |
| 2027-06-29 Tue | 10 | — | unknown | 23:10–23:15 (good, 0.08 h) | 50.2° 19:20 | 4.49 | 23% | 143.5° |
| 2027-06-30 Wed | 9 | — | unknown | 22:20–23:40 (marginal, 1.33 h) | 50.2° 19:20 | 4.51 | 14% | 130.0° |
| 2027-07-01 Thu | 8 | — | unknown | 22:20–23:05 (marginal, 0.75 h) | 50.2° 19:15 | 4.53 | 7% | 115.9° |
| 2027-07-02 Fri | 7 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.2° 19:10 | 4.55 | 2% | 101.4° |
| 2027-07-03 Sat | 6 | — | unknown | 22:20–23:00 (marginal, 0.67 h) | 50.2° 19:05 | 4.58 | 0% | 86.6° |
| 2027-07-04 Sun | 5 | — | unknown | 22:20–22:55 (marginal, 0.58 h) | 50.2° 19:00 | 4.6 | 1% | 71.6° |
| 2027-07-05 Mon | 5 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.2° 19:00 | 4.63 | 5% | 56.7° |
| 2027-07-06 Tue | 4 | — | unknown | 22:20–22:40 (marginal, 0.33 h) | 50.2° 18:55 | 4.66 | 11% | 42.1° |
| 2027-07-07 Wed | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.2° 18:50 | 4.69 | 20% | 28.0° |
| 2027-07-08 Thu | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.2° 18:45 | 4.72 | 30% | 15.3° |
| 2027-07-09 Fri | 2 | — | unknown | — | 50.2° 18:40 | 4.76 | 41% | 9.2° |
| 2027-07-10 Sat | 1 | — | unknown | — | 50.2° 18:40 | 4.79 | 52% | 17.4° |
| 2027-07-11 Sun | 1 | — | unknown | — | 50.2° 18:35 | 4.83 | 62% | 29.4° |
| 2027-07-12 Mon | 1 | — | unknown | — | 50.2° 18:30 | 4.87 | 72% | 41.6° |
| 2027-07-13 Tue | 1 | — | unknown | — | 50.2° 18:25 | 4.9 | 80% | 53.9° |
| 2027-07-14 Wed | 1 | — | unknown | — | 50.2° 18:20 | 4.95 | 88% | 66.0° |
| 2027-07-15 Thu | 1 | — | unknown | — | 50.2° 18:20 | 4.99 | 93% | 77.9° |
| 2027-07-16 Fri | 1 | — | unknown | — | 50.2° 18:15 | 5.03 | 97% | 89.8° |
| 2027-07-17 Sat | 1 | — | unknown | — | 50.2° 18:10 | 5.07 | 100% | 101.6° |
| 2027-07-18 Sun | 1 | — | unknown | — | 50.2° 18:05 | 5.12 | 100% | 113.2° |
| 2027-07-19 Mon | 1 | — | unknown | — | 50.2° 18:05 | 5.17 | 98% | 124.9° |
| 2027-07-20 Tue | 1 | — | unknown | — | 50.2° 18:00 | 5.21 | 95% | 136.5° |
| 2027-07-21 Wed | 1 | — | unknown | — | 50.2° 17:55 | 5.26 | 91% | 148.0° |
| 2027-07-22 Thu | 0 | — | unknown | — | 50.2° 17:50 | 5.31 | 84% | 159.1° |
| 2027-07-23 Fri | 0 | — | unknown | — | 50.2° 17:45 | 5.36 | 77% | 168.7° |
| 2027-07-24 Sat | 0 | — | unknown | — | 50.2° 17:45 | 5.41 | 68% | 169.4° |
| 2027-07-25 Sun | 0 | — | unknown | — | 50.2° 17:40 | 5.46 | 58% | 159.8° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-06-26&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.