← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-06-09 Wed | 28 | — | unknown | 23:05–00:20 (good, 1.25 h) | 50.2° 20:40 | 4.56 | 33% | 37.4° |
| 2027-06-10 Thu | 22 | — | unknown | 23:05–00:05 (good, 1.0 h) | 50.2° 20:35 | 4.54 | 44% | 24.0° |
| 2027-06-11 Fri | 17 | — | unknown | 23:10–00:50 (marginal, 1.67 h) | 50.2° 20:30 | 4.52 | 55% | 12.3° |
| 2027-06-12 Sat | 13 | — | unknown | 23:10–00:45 (marginal, 1.58 h) | 50.2° 20:30 | 4.5 | 66% | 10.1° |
| 2027-06-13 Sun | 10 | — | unknown | 23:10–00:30 (marginal, 1.33 h) | 50.2° 20:25 | 4.48 | 76% | 20.1° |
| 2027-06-14 Mon | 9 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:20 | 4.47 | 84% | 32.1° |
| 2027-06-15 Tue | 9 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:15 | 4.45 | 91% | 44.4° |
| 2027-06-16 Wed | 10 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:15 | 4.44 | 96% | 56.7° |
| 2027-06-17 Thu | 12 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:10 | 4.44 | 99% | 68.8° |
| 2027-06-18 Fri | 14 | — | unknown | 23:10–00:20 (marginal, 1.17 h) | 50.2° 20:05 | 4.43 | 100% | 80.9° |
| 2027-06-19 Sat | 15 | — | unknown | 23:10–23:30 (good, 0.33 h) | 50.2° 20:00 | 4.42 | 99% | 92.8° |
| 2027-06-20 Sun | 17 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:55 | 4.42 | 97% | 104.5° |
| 2027-06-21 Mon | 18 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:55 | 4.42 | 92% | 116.2° |
| 2027-06-22 Tue | 19 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:50 | 4.42 | 87% | 127.9° |
| 2027-06-23 Wed | 17 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:45 | 4.43 | 80% | 139.5° |
| 2027-06-24 Thu | 16 | — | unknown | 23:15–23:35 (good, 0.33 h) | 50.2° 19:40 | 4.43 | 72% | 150.9° |
| 2027-06-25 Fri | 14 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.2° 19:35 | 4.44 | 62% | 162.0° |
| 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° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-06-09&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.