← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-07-01 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° |
| 2027-07-19 Mon | 5 | — | unknown | 03:45–04:05 (marginal, 0.33 h) | 72.5° 09:20 | 5.17 | 98% | 108.8° |
| 2027-07-20 Tue | 5 | — | unknown | 03:40–04:05 (marginal, 0.42 h) | 72.5° 09:15 | 5.21 | 95% | 97.0° |
| 2027-07-21 Wed | 5 | — | unknown | 03:40–04:10 (marginal, 0.5 h) | 72.5° 09:10 | 5.26 | 91% | 85.1° |
| 2027-07-22 Thu | 5 | — | unknown | 03:40–04:10 (marginal, 0.5 h) | 72.5° 09:05 | 5.31 | 84% | 73.1° |
| 2027-07-23 Fri | 5 | — | unknown | 03:40–04:10 (marginal, 0.5 h) | 72.5° 09:00 | 5.36 | 77% | 61.0° |
| 2027-07-24 Sat | 6 | — | unknown | 03:35–04:15 (marginal, 0.67 h) | 72.5° 09:00 | 5.41 | 68% | 48.7° |
| 2027-07-25 Sun | 7 | — | unknown | 03:30–04:15 (marginal, 0.75 h) | 72.5° 08:55 | 5.46 | 58% | 36.1° |
| 2027-07-26 Mon | 9 | — | unknown | 03:20–04:15 (marginal, 0.92 h) | 72.5° 08:50 | 5.51 | 48% | 23.2° |
| 2027-07-27 Tue | 12 | — | unknown | 04:05–04:15 (good, 0.17 h) | 72.5° 08:45 | 5.56 | 37% | 9.9° |
| 2027-07-28 Wed | 17 | — | unknown | 03:50–04:20 (good, 0.5 h) | 72.5° 08:40 | 5.62 | 27% | 4.0° |
| 2027-07-29 Thu | 21 | — | unknown | 03:40–04:20 (good, 0.67 h) | 72.5° 08:40 | 5.67 | 17% | 18.1° |
| 2027-07-30 Fri | 25 | — | unknown | 03:30–04:20 (good, 0.83 h) | 72.5° 08:35 | 5.72 | 9% | 32.7° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-07-01&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.