← 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. |
|---|---|---|---|---|---|---|---|---|
| 2041-07-16 Tue | 2 | — | unknown | — | 72.5° 09:30 | 5.06 | 86% | 81.4° |
| 2041-07-17 Wed | 2 | — | unknown | 04:00–04:05 (marginal, 0.08 h) | 72.5° 09:25 | 5.1 | 77% | 66.7° |
| 2041-07-18 Thu | 3 | — | unknown | 03:55–04:05 (marginal, 0.17 h) | 72.5° 09:20 | 5.15 | 66% | 52.3° |
| 2041-07-19 Fri | 3 | — | unknown | 03:50–04:05 (marginal, 0.25 h) | 72.5° 09:15 | 5.19 | 55% | 38.3° |
| 2041-07-20 Sat | 4 | — | unknown | 03:40–04:05 (marginal, 0.42 h) | 72.5° 09:10 | 5.24 | 44% | 24.7° |
| 2041-07-21 Sun | 7 | — | unknown | 03:35–04:10 (marginal, 0.58 h) | 72.5° 09:10 | 5.29 | 34% | 11.5° |
| 2041-07-22 Mon | 9 | — | unknown | 03:30–04:55 (marginal, 1.42 h) | 72.5° 09:05 | 5.34 | 24% | 3.2° |
| 2041-07-23 Tue | 12 | — | unknown | 04:00–04:10 (good, 0.17 h) | 72.5° 09:00 | 5.39 | 16% | 15.0° |
| 2041-07-24 Wed | 16 | — | unknown | 03:55–04:15 (good, 0.33 h) | 72.5° 08:55 | 5.44 | 9% | 27.4° |
| 2041-07-25 Thu | 19 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.5° 08:55 | 5.49 | 4% | 39.8° |
| 2041-07-26 Fri | 20 | — | unknown | 03:45–04:15 (good, 0.5 h) | 72.5° 08:50 | 5.54 | 1% | 52.0° |
| 2041-07-27 Sat | 23 | — | unknown | 03:40–04:20 (good, 0.67 h) | 72.5° 08:45 | 5.6 | 0% | 64.1° |
| 2041-07-28 Sun | 24 | — | unknown | 03:35–04:20 (good, 0.75 h) | 72.5° 08:40 | 5.65 | 1% | 76.1° |
| 2041-07-29 Mon | 26 | — | unknown | 03:30–04:20 (good, 0.83 h) | 72.5° 08:35 | 5.7 | 3% | 87.9° |
| 2041-07-30 Tue | 28 | — | unknown | 03:25–04:25 (good, 1.0 h) | 72.5° 08:35 | 5.76 | 8% | 99.7° |
| 2041-07-31 Wed | 30 | — | unknown | 03:25–04:25 (good, 1.0 h) | 72.5° 08:30 | 5.81 | 13% | 111.5° |
| 2041-08-01 Thu | 32 | — | unknown | 03:20–04:25 (good, 1.08 h) | 72.5° 08:25 | 5.87 | 20% | 123.4° |
| 2041-08-02 Fri | 34 | — | unknown | 03:15–04:30 (good, 1.25 h) | 72.5° 08:20 | 5.92 | 28% | 135.3° |
| 2041-08-03 Sat | 35 | — | unknown | 03:10–04:30 (good, 1.33 h) | 72.5° 08:15 | 5.98 | 38% | 147.4° |
| 2041-08-04 Sun | 38 | — | unknown | 03:05–04:30 (good, 1.42 h) | 72.5° 08:15 | 6.03 | 47% | 159.7° |
| 2041-08-05 Mon | 39 | — | unknown | 03:05–04:30 (good, 1.42 h) | 72.5° 08:10 | 6.09 | 57% | 172.1° |
| 2041-08-06 Tue | 42 | — | unknown | 03:00–04:35 (good, 1.58 h) | 72.5° 08:05 | 6.15 | 68% | 174.0° |
| 2041-08-07 Wed | 43 | — | unknown | 02:55–04:35 (good, 1.67 h) | 72.5° 08:00 | 6.2 | 77% | 160.8° |
| 2041-08-08 Thu | 46 | — | unknown | 02:50–04:35 (good, 1.75 h) | 72.5° 08:00 | 6.26 | 86% | 146.9° |
| 2041-08-09 Fri | 47 | — | unknown | 02:55–04:40 (good, 1.75 h) | 72.5° 07:55 | 6.32 | 93% | 132.5° |
| 2041-08-10 Sat | 42 | — | unknown | 02:55–04:40 (good, 1.75 h) | 72.5° 07:50 | 6.38 | 98% | 117.7° |
| 2041-08-11 Sun | 35 | — | unknown | 03:00–04:40 (good, 1.67 h) | 72.5° 07:45 | 6.43 | 100% | 102.6° |
| 2041-08-12 Mon | 29 | — | unknown | 03:40–04:45 (good, 1.08 h) | 72.5° 07:40 | 6.49 | 99% | 87.4° |
| 2041-08-13 Tue | 22 | — | unknown | 02:15–04:45 (marginal, 2.5 h) | 72.5° 07:40 | 6.55 | 95% | 72.3° |
| 2041-08-14 Wed | 18 | — | unknown | 02:20–04:45 (marginal, 2.42 h) | 72.5° 07:35 | 6.61 | 88% | 57.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2041-07-16&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.