← 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. |
|---|---|---|---|---|---|---|---|---|
| 2038-06-17 Thu | 27 | — | unknown | 02:35–03:40 (good, 1.08 h) | 89.8° 08:20 | 4.43 | 99% | 106.5° |
| 2038-06-18 Fri | 24 | — | unknown | 02:40–03:40 (good, 1.0 h) | 89.7° 08:15 | 4.43 | 96% | 95.7° |
| 2038-06-19 Sat | 23 | — | unknown | 02:50–03:40 (good, 0.83 h) | 89.6° 08:10 | 4.42 | 90% | 85.0° |
| 2038-06-20 Sun | 23 | — | unknown | 03:05–03:40 (good, 0.58 h) | 89.5° 08:10 | 4.42 | 83% | 74.8° |
| 2038-06-21 Mon | 23 | — | unknown | 03:00–03:40 (good, 0.67 h) | 89.7° 08:05 | 4.42 | 74% | 65.2° |
| 2038-06-22 Tue | 25 | — | unknown | 02:25–03:40 (good, 1.25 h) | 89.8° 08:00 | 4.43 | 65% | 56.5° |
| 2038-06-23 Wed | 28 | — | unknown | 02:15–03:40 (good, 1.42 h) | 89.7° 07:55 | 4.43 | 56% | 48.9° |
| 2038-06-24 Thu | 33 | — | unknown | 02:05–03:40 (good, 1.58 h) | 89.5° 07:50 | 4.44 | 46% | 43.0° |
| 2038-06-25 Fri | 42 | — | unknown | 01:45–03:40 (good, 1.92 h) | 89.6° 07:50 | 4.45 | 37% | 39.3° |
| 2038-06-26 Sat | 48 | — | unknown | 01:40–03:40 (good, 2.0 h) | 89.7° 07:45 | 4.46 | 28% | 38.4° |
| 2038-06-27 Sun | 52 | — | unknown | 01:35–03:40 (good, 2.08 h) | 89.8° 07:40 | 4.47 | 20% | 40.6° |
| 2038-06-28 Mon | 57 | — | unknown | 01:35–03:40 (good, 2.08 h) | 89.7° 07:35 | 4.48 | 13% | 45.5° |
| 2038-06-29 Tue | 59 | — | unknown | 01:30–03:40 (good, 2.17 h) | 89.5° 07:30 | 4.5 | 7% | 52.3° |
| 2038-06-30 Wed | 63 | — | unknown | 01:25–03:45 (good, 2.33 h) | 89.7° 07:30 | 4.52 | 3% | 60.5° |
| 2038-07-01 Thu | 64 | — | unknown | 01:20–03:45 (good, 2.42 h) | 89.8° 07:25 | 4.54 | 0% | 69.6° |
| 2038-07-02 Fri | 66 | — | unknown | 01:15–03:45 (good, 2.5 h) | 89.8° 07:20 | 4.56 | 0% | 79.5° |
| 2038-07-03 Sat | 68 | — | unknown | 01:15–03:45 (good, 2.5 h) | 89.6° 07:15 | 4.59 | 2% | 89.7° |
| 2038-07-04 Sun | 70 | — | unknown | 01:10–03:45 (good, 2.58 h) | 89.5° 07:15 | 4.61 | 6% | 100.1° |
| 2038-07-05 Mon | 74 | — | unknown | 01:05–03:50 (good, 2.75 h) | 89.7° 07:10 | 4.64 | 13% | 110.5° |
| 2038-07-06 Tue | 75 | — | unknown | 01:00–03:50 (good, 2.83 h) | 89.8° 07:05 | 4.67 | 21% | 120.4° |
| 2038-07-07 Wed | 77 | — | unknown | 00:55–03:50 (good, 2.92 h) | 89.7° 07:00 | 4.7 | 31% | 129.5° |
| 2038-07-08 Thu | 79 | — | unknown | 00:55–03:50 (good, 2.92 h) | 89.6° 06:55 | 4.73 | 42% | 136.7° |
| 2038-07-09 Fri | 81 | — | unknown | 00:55–03:50 (good, 2.92 h) | 89.6° 06:55 | 4.77 | 53% | 141.0° |
| 2038-07-10 Sat | 84 | — | unknown | 00:50–03:55 (good, 3.08 h) | 89.7° 06:50 | 4.8 | 64% | 141.2° |
| 2038-07-11 Sun | 85 | — | unknown | 00:50–03:55 (good, 3.08 h) | 89.8° 06:45 | 4.84 | 75% | 137.1° |
| 2038-07-12 Mon | 85 | — | unknown | 00:45–03:55 (good, 3.17 h) | 89.7° 06:40 | 4.88 | 84% | 129.9° |
| 2038-07-13 Tue | 85 | — | unknown | 00:45–03:55 (good, 3.17 h) | 89.5° 06:35 | 4.92 | 92% | 120.7° |
| 2038-07-14 Wed | 73 | — | unknown | 00:45–04:00 (good, 3.25 h) | 89.6° 06:35 | 4.96 | 97% | 110.5° |
| 2038-07-15 Thu | 63 | — | unknown | 00:50–04:00 (good, 3.17 h) | 89.8° 06:30 | 5.0 | 100% | 99.8° |
| 2038-07-16 Fri | 55 | — | unknown | 01:10–04:00 (good, 2.83 h) | 89.8° 06:25 | 5.05 | 100% | 89.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2038-06-17&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.