← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-06-19 Sat | 0 | — | unknown | — | 72.5° 11:15 | 4.42 | 99% | 141.4° |
| 2027-06-20 Sun | 0 | — | unknown | — | 72.5° 11:10 | 4.42 | 97% | 129.5° |
| 2027-06-21 Mon | 0 | — | unknown | — | 72.5° 11:10 | 4.42 | 92% | 117.6° |
| 2027-06-22 Tue | 0 | — | unknown | — | 72.5° 11:05 | 4.42 | 87% | 105.8° |
| 2027-06-23 Wed | 0 | — | unknown | — | 72.5° 11:00 | 4.43 | 80% | 93.9° |
| 2027-06-24 Thu | 0 | — | unknown | — | 72.5° 10:55 | 4.43 | 72% | 82.0° |
| 2027-06-25 Fri | 0 | — | unknown | — | 72.5° 10:50 | 4.44 | 62% | 69.9° |
| 2027-06-26 Sat | 0 | — | unknown | — | 72.5° 10:50 | 4.45 | 53% | 57.6° |
| 2027-06-27 Sun | 0 | — | unknown | — | 72.5° 10:45 | 4.46 | 43% | 45.0° |
| 2027-06-28 Mon | 0 | — | unknown | — | 72.5° 10:40 | 4.48 | 32% | 32.1° |
| 2027-06-29 Tue | 0 | — | unknown | — | 72.5° 10:35 | 4.49 | 23% | 18.7° |
| 2027-06-30 Wed | 0 | — | unknown | — | 72.5° 10:35 | 4.51 | 14% | 4.9° |
| 2027-07-01 Thu | 0 | — | unknown | — | 72.5° 10:30 | 4.53 | 7% | 9.5° |
| 2027-07-02 Fri | 0 | — | unknown | — | 72.5° 10:25 | 4.55 | 2% | 24.2° |
| 2027-07-03 Sat | 0 | — | unknown | — | 72.5° 10:20 | 4.58 | 0% | 39.2° |
| 2027-07-04 Sun | 0 | — | unknown | — | 72.5° 10:15 | 4.6 | 1% | 54.4° |
| 2027-07-05 Mon | 0 | — | unknown | — | 72.5° 10:15 | 4.63 | 5% | 69.5° |
| 2027-07-06 Tue | 0 | — | unknown | — | 72.5° 10:10 | 4.66 | 11% | 84.5° |
| 2027-07-07 Wed | 1 | — | unknown | — | 72.5° 10:05 | 4.69 | 20% | 99.2° |
| 2027-07-08 Thu | 1 | — | unknown | — | 72.5° 10:00 | 4.72 | 30% | 113.4° |
| 2027-07-09 Fri | 1 | — | unknown | — | 72.5° 09:55 | 4.76 | 41% | 127.3° |
| 2027-07-10 Sat | 1 | — | unknown | — | 72.5° 09:55 | 4.79 | 52% | 140.8° |
| 2027-07-11 Sun | 1 | — | unknown | — | 72.5° 09:50 | 4.83 | 62% | 153.8° |
| 2027-07-12 Mon | 2 | — | unknown | 04:40–04:45 (marginal, 0.08 h) | 72.5° 09:45 | 4.87 | 72% | 166.6° |
| 2027-07-13 Tue | 2 | — | unknown | 04:35–04:45 (marginal, 0.17 h) | 72.5° 09:40 | 4.9 | 80% | 178.8° |
| 2027-07-14 Wed | 2 | — | unknown | 04:30–04:45 (marginal, 0.25 h) | 72.5° 09:40 | 4.95 | 88% | 168.5° |
| 2027-07-15 Thu | 3 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:35 | 4.99 | 93% | 156.4° |
| 2027-07-16 Fri | 3 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:30 | 5.03 | 97% | 144.4° |
| 2027-07-17 Sat | 3 | — | unknown | 04:30–04:50 (marginal, 0.33 h) | 72.5° 09:25 | 5.07 | 100% | 132.5° |
| 2027-07-18 Sun | 5 | — | unknown | 04:25–04:50 (marginal, 0.42 h) | 72.5° 09:20 | 5.12 | 100% | 120.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-06-19&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.