← 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. |
|---|---|---|---|---|---|---|---|---|
| 2040-06-08 Fri | 2 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.2° 09:45 | 4.57 | 1% | 40.3° |
| 2040-06-09 Sat | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.2° 09:40 | 4.54 | 0% | 50.6° |
| 2040-06-10 Sun | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.2° 09:35 | 4.52 | 1% | 61.2° |
| 2040-06-11 Mon | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.2° 09:30 | 4.5 | 4% | 72.0° |
| 2040-06-12 Tue | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.2° 09:30 | 4.49 | 9% | 83.0° |
| 2040-06-13 Wed | 5 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:25 | 4.47 | 15% | 93.9° |
| 2040-06-14 Thu | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.2° 09:20 | 4.46 | 22% | 104.9° |
| 2040-06-15 Fri | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.2° 09:15 | 4.45 | 31% | 115.9° |
| 2040-06-16 Sat | 8 | — | unknown | 03:45–04:30 (marginal, 0.75 h) | 79.2° 09:15 | 4.44 | 40% | 126.8° |
| 2040-06-17 Sun | 9 | — | unknown | 03:15–04:30 (marginal, 1.25 h) | 79.2° 09:10 | 4.43 | 50% | 137.5° |
| 2040-06-18 Mon | 10 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 09:05 | 4.43 | 61% | 147.5° |
| 2040-06-19 Tue | 11 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 09:00 | 4.42 | 71% | 155.4° |
| 2040-06-20 Wed | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:55 | 4.42 | 80% | 157.9° |
| 2040-06-21 Thu | 14 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:55 | 4.42 | 88% | 152.9° |
| 2040-06-22 Fri | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:50 | 4.43 | 95% | 142.7° |
| 2040-06-23 Sat | 14 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:45 | 4.43 | 99% | 130.3° |
| 2040-06-24 Sun | 15 | — | unknown | 03:25–03:40 (good, 0.25 h) | 79.2° 08:40 | 4.44 | 100% | 116.8° |
| 2040-06-25 Mon | 14 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.2° 08:35 | 4.45 | 98% | 102.8° |
| 2040-06-26 Tue | 13 | — | unknown | 03:35–03:40 (good, 0.08 h) | 79.2° 08:35 | 4.46 | 93% | 88.8° |
| 2040-06-27 Wed | 12 | — | unknown | 02:35–03:40 (marginal, 1.08 h) | 79.2° 08:30 | 4.48 | 86% | 75.0° |
| 2040-06-28 Thu | 12 | — | unknown | 02:35–03:40 (marginal, 1.08 h) | 79.2° 08:25 | 4.49 | 76% | 61.7° |
| 2040-06-29 Fri | 13 | — | unknown | 02:30–03:45 (marginal, 1.25 h) | 79.2° 08:20 | 4.51 | 66% | 49.2° |
| 2040-06-30 Sat | 15 | — | unknown | 02:20–03:45 (marginal, 1.42 h) | 79.2° 08:20 | 4.53 | 55% | 37.7° |
| 2040-07-01 Sun | 18 | — | unknown | 03:10–03:45 (good, 0.58 h) | 79.2° 08:15 | 4.55 | 45% | 28.2° |
| 2040-07-02 Mon | 21 | — | unknown | 03:00–03:45 (good, 0.75 h) | 79.2° 08:10 | 4.57 | 34% | 22.5° |
| 2040-07-03 Tue | 26 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.2° 08:05 | 4.6 | 25% | 23.0° |
| 2040-07-04 Wed | 31 | — | unknown | 02:35–03:45 (good, 1.17 h) | 79.2° 08:00 | 4.63 | 17% | 29.1° |
| 2040-07-05 Thu | 36 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.2° 08:00 | 4.66 | 10% | 38.0° |
| 2040-07-06 Fri | 39 | — | unknown | 02:25–03:50 (good, 1.42 h) | 79.2° 07:55 | 4.69 | 5% | 48.0° |
| 2040-07-07 Sat | 41 | — | unknown | 02:25–03:50 (good, 1.42 h) | 79.2° 07:50 | 4.72 | 2% | 58.5° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2040-06-08&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.