← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-06-07 Mon | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.1° 09:50 | 4.61 | 14% | 86.6° |
| 2027-06-08 Tue | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.1° 09:45 | 4.59 | 23% | 100.8° |
| 2027-06-09 Wed | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.1° 09:45 | 4.56 | 33% | 114.7° |
| 2027-06-10 Thu | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:40 | 4.54 | 44% | 128.2° |
| 2027-06-11 Fri | 3 | — | unknown | 04:10–04:30 (marginal, 0.33 h) | 79.1° 09:35 | 4.52 | 55% | 141.1° |
| 2027-06-12 Sat | 4 | — | unknown | 04:05–04:30 (marginal, 0.42 h) | 79.1° 09:30 | 4.5 | 66% | 153.0° |
| 2027-06-13 Sun | 5 | — | unknown | 04:00–04:30 (marginal, 0.5 h) | 79.1° 09:25 | 4.48 | 76% | 162.6° |
| 2027-06-14 Mon | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.1° 09:25 | 4.47 | 84% | 165.4° |
| 2027-06-15 Tue | 6 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:20 | 4.45 | 91% | 158.8° |
| 2027-06-16 Wed | 6 | — | unknown | 03:55–04:30 (marginal, 0.58 h) | 79.1° 09:15 | 4.44 | 96% | 148.6° |
| 2027-06-17 Thu | 7 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:10 | 4.44 | 99% | 137.4° |
| 2027-06-18 Fri | 8 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:05 | 4.43 | 100% | 125.9° |
| 2027-06-19 Sat | 8 | — | unknown | 03:50–04:30 (marginal, 0.67 h) | 79.1° 09:05 | 4.42 | 99% | 114.4° |
| 2027-06-20 Sun | 8 | — | unknown | 03:05–03:40 (marginal, 0.58 h) | 79.1° 09:00 | 4.42 | 97% | 102.8° |
| 2027-06-21 Mon | 7 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.1° 08:55 | 4.42 | 92% | 91.3° |
| 2027-06-22 Tue | 7 | — | unknown | 03:00–03:40 (marginal, 0.67 h) | 79.1° 08:50 | 4.42 | 87% | 79.9° |
| 2027-06-23 Wed | 8 | — | unknown | 02:55–03:40 (marginal, 0.75 h) | 79.1° 08:50 | 4.43 | 80% | 68.4° |
| 2027-06-24 Thu | 8 | — | unknown | 02:55–03:40 (marginal, 0.75 h) | 79.1° 08:45 | 4.43 | 72% | 56.9° |
| 2027-06-25 Fri | 9 | — | unknown | 02:50–03:40 (marginal, 0.83 h) | 79.1° 08:40 | 4.44 | 62% | 45.5° |
| 2027-06-26 Sat | 11 | — | unknown | 02:40–03:40 (marginal, 1.0 h) | 79.1° 08:35 | 4.45 | 53% | 34.2° |
| 2027-06-27 Sun | 13 | — | unknown | 03:30–03:40 (good, 0.17 h) | 79.1° 08:30 | 4.46 | 43% | 23.4° |
| 2027-06-28 Mon | 17 | — | unknown | 03:20–03:40 (good, 0.33 h) | 79.1° 08:30 | 4.48 | 32% | 15.3° |
| 2027-06-29 Tue | 20 | — | unknown | 03:05–03:40 (good, 0.58 h) | 79.1° 08:25 | 4.49 | 23% | 16.1° |
| 2027-06-30 Wed | 25 | — | unknown | 03:00–03:45 (good, 0.75 h) | 79.1° 08:20 | 4.51 | 14% | 25.5° |
| 2027-07-01 Thu | 29 | — | unknown | 02:50–03:45 (good, 0.92 h) | 79.1° 08:15 | 4.53 | 7% | 38.1° |
| 2027-07-02 Fri | 31 | — | unknown | 02:45–03:45 (good, 1.0 h) | 79.1° 08:10 | 4.55 | 2% | 51.9° |
| 2027-07-03 Sat | 32 | — | unknown | 02:40–03:45 (good, 1.08 h) | 79.1° 08:10 | 4.58 | 0% | 66.3° |
| 2027-07-04 Sun | 34 | — | unknown | 02:35–03:45 (good, 1.17 h) | 79.1° 08:05 | 4.6 | 1% | 80.9° |
| 2027-07-05 Mon | 35 | — | unknown | 02:35–03:45 (good, 1.17 h) | 79.1° 08:00 | 4.63 | 5% | 95.6° |
| 2027-07-06 Tue | 38 | — | unknown | 02:30–03:50 (good, 1.33 h) | 79.1° 07:55 | 4.66 | 11% | 110.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-06-07&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.