← 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. |
|---|---|---|---|---|---|---|---|---|
| 2042-06-13 Fri | 33 | — | unknown | 23:10–00:15 (good, 1.08 h) | 50.1° 20:25 | 4.48 | 19% | 154.0° |
| 2042-06-14 Sat | 31 | — | unknown | 23:10–00:10 (good, 1.0 h) | 50.1° 20:20 | 4.46 | 11% | 139.6° |
| 2042-06-15 Sun | 29 | — | unknown | 23:10–00:10 (good, 1.0 h) | 50.1° 20:15 | 4.45 | 5% | 125.3° |
| 2042-06-16 Mon | 28 | — | unknown | 23:10–00:05 (good, 0.92 h) | 50.1° 20:10 | 4.44 | 1% | 111.2° |
| 2042-06-17 Tue | 27 | — | unknown | 23:10–00:00 (good, 0.83 h) | 50.1° 20:10 | 4.43 | 0% | 97.2° |
| 2042-06-18 Wed | 26 | — | unknown | 23:10–23:55 (good, 0.75 h) | 50.1° 20:05 | 4.43 | 2% | 83.5° |
| 2042-06-19 Thu | 24 | — | unknown | 23:10–23:50 (good, 0.67 h) | 50.1° 20:00 | 4.42 | 6% | 70.2° |
| 2042-06-20 Fri | 21 | — | unknown | 23:15–23:50 (good, 0.58 h) | 50.1° 19:55 | 4.42 | 11% | 57.2° |
| 2042-06-21 Sat | 17 | — | unknown | 23:15–23:40 (good, 0.42 h) | 50.1° 19:50 | 4.42 | 18% | 44.6° |
| 2042-06-22 Sun | 14 | — | unknown | 23:15–23:30 (good, 0.25 h) | 50.1° 19:50 | 4.42 | 26% | 32.3° |
| 2042-06-23 Mon | 11 | — | unknown | 22:20–00:05 (marginal, 1.75 h) | 50.1° 19:45 | 4.43 | 36% | 20.2° |
| 2042-06-24 Tue | 9 | — | unknown | 23:15–00:00 (marginal, 0.75 h) | 50.1° 19:40 | 4.44 | 45% | 8.6° |
| 2042-06-25 Wed | 7 | — | unknown | 23:15–23:55 (marginal, 0.67 h) | 50.1° 19:35 | 4.44 | 54% | 5.0° |
| 2042-06-26 Thu | 5 | — | unknown | 23:15–23:45 (marginal, 0.5 h) | 50.1° 19:35 | 4.46 | 64% | 16.0° |
| 2042-06-27 Fri | 4 | — | unknown | 23:15–23:35 (marginal, 0.33 h) | 50.1° 19:30 | 4.47 | 72% | 27.8° |
| 2042-06-28 Sat | 3 | — | unknown | 23:15–23:30 (marginal, 0.25 h) | 50.1° 19:25 | 4.48 | 81% | 39.8° |
| 2042-06-29 Sun | 4 | — | unknown | 23:10–23:25 (marginal, 0.25 h) | 50.1° 19:20 | 4.5 | 88% | 52.1° |
| 2042-06-30 Mon | 4 | — | unknown | 23:10–23:30 (marginal, 0.33 h) | 50.1° 19:15 | 4.52 | 94% | 64.6° |
| 2042-07-01 Tue | 4 | — | unknown | 23:10–23:30 (marginal, 0.33 h) | 50.1° 19:15 | 4.54 | 98% | 77.5° |
| 2042-07-02 Wed | 4 | — | unknown | 23:10–23:30 (marginal, 0.33 h) | 50.1° 19:10 | 4.56 | 100% | 90.6° |
| 2042-07-03 Thu | 4 | — | unknown | 22:20–22:40 (marginal, 0.33 h) | 50.1° 19:05 | 4.59 | 99% | 104.0° |
| 2042-07-04 Fri | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 19:00 | 4.61 | 97% | 117.7° |
| 2042-07-05 Sat | 4 | — | unknown | 22:20–22:50 (marginal, 0.5 h) | 50.1° 18:55 | 4.64 | 92% | 131.6° |
| 2042-07-06 Sun | 4 | — | unknown | 22:20–22:45 (marginal, 0.42 h) | 50.1° 18:55 | 4.67 | 84% | 145.6° |
| 2042-07-07 Mon | 3 | — | unknown | 22:15–22:40 (marginal, 0.42 h) | 50.1° 18:50 | 4.7 | 75% | 159.7° |
| 2042-07-08 Tue | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:45 | 4.73 | 65% | 173.3° |
| 2042-07-09 Wed | 3 | — | unknown | 22:15–22:35 (marginal, 0.33 h) | 50.1° 18:40 | 4.77 | 54% | 171.1° |
| 2042-07-10 Thu | 2 | — | unknown | 22:15–22:30 (marginal, 0.25 h) | 50.1° 18:40 | 4.8 | 42% | 157.3° |
| 2042-07-11 Fri | 2 | — | unknown | 22:15–22:25 (marginal, 0.17 h) | 50.1° 18:35 | 4.84 | 31% | 143.3° |
| 2042-07-12 Sat | 2 | — | unknown | 22:15–22:20 (marginal, 0.08 h) | 50.1° 18:30 | 4.88 | 21% | 129.3° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2042-06-13&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.