← 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. |
|---|---|---|---|---|---|---|---|---|
| 2027-03-06 Sat | 82 | — | unknown | 02:05–05:15 (good, 3.17 h) | 87.1° 08:00 | 9.43 | 2% | 69.4° |
| 2027-03-07 Sun | 84 | — | unknown | 02:00–05:15 (good, 3.25 h) | 87.1° 07:55 | 9.38 | 0% | 73.1° |
| 2027-03-08 Mon | 86 | — | unknown | 02:00–05:15 (good, 3.25 h) | 87.1° 07:50 | 9.33 | 0% | 77.6° |
| 2027-03-09 Tue | 86 | — | unknown | 01:55–05:10 (good, 3.25 h) | 87.1° 07:50 | 9.28 | 3% | 82.8° |
| 2027-03-10 Wed | 88 | — | unknown | 01:50–05:10 (good, 3.33 h) | 87.1° 07:45 | 9.23 | 7% | 88.3° |
| 2027-03-11 Thu | 89 | — | unknown | 01:45–05:10 (good, 3.42 h) | 87.1° 07:40 | 9.19 | 13% | 94.0° |
| 2027-03-12 Fri | 89 | — | unknown | 01:40–05:05 (good, 3.42 h) | 87.1° 07:35 | 9.14 | 21% | 99.6° |
| 2027-03-13 Sat | 91 | — | unknown | 01:40–05:05 (good, 3.42 h) | 87.1° 07:30 | 9.09 | 31% | 104.8° |
| 2027-03-14 Sun | 91 | — | unknown | 01:35–05:05 (good, 3.5 h) | 87.1° 07:30 | 9.04 | 42% | 109.4° |
| 2027-03-15 Mon | 90 | — | unknown | 01:35–05:00 (good, 3.42 h) | 87.1° 07:25 | 8.99 | 53% | 112.9° |
| 2027-03-16 Tue | 90 | — | unknown | 01:35–05:00 (good, 3.42 h) | 87.1° 07:20 | 8.94 | 64% | 115.1° |
| 2027-03-17 Wed | 89 | — | unknown | 01:35–05:00 (good, 3.42 h) | 87.1° 07:15 | 8.89 | 75% | 115.6° |
| 2027-03-18 Thu | 86 | — | unknown | 01:30–04:55 (good, 3.42 h) | 87.1° 07:15 | 8.84 | 84% | 114.4° |
| 2027-03-19 Fri | 75 | — | unknown | 01:35–04:55 (good, 3.33 h) | 87.1° 07:10 | 8.79 | 92% | 111.6° |
| 2027-03-20 Sat | 70 | — | unknown | 01:35–04:55 (good, 3.33 h) | 87.1° 07:05 | 8.73 | 97% | 107.5° |
| 2027-03-21 Sun | 64 | — | unknown | 01:35–04:50 (good, 3.25 h) | 87.1° 07:00 | 8.68 | 100% | 102.4° |
| 2027-03-22 Mon | 59 | — | unknown | 01:45–04:50 (good, 3.08 h) | 87.1° 06:55 | 8.63 | 100% | 96.7° |
| 2027-03-23 Tue | 56 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.1° 06:55 | 8.58 | 97% | 90.8° |
| 2027-03-24 Wed | 54 | — | unknown | 01:55–04:45 (good, 2.83 h) | 87.1° 06:50 | 8.53 | 92% | 85.0° |
| 2027-03-25 Thu | 55 | — | unknown | 01:30–04:45 (good, 3.25 h) | 87.1° 06:45 | 8.47 | 86% | 79.6° |
| 2027-03-26 Fri | 57 | — | unknown | 01:15–04:40 (good, 3.42 h) | 87.1° 06:40 | 8.42 | 78% | 74.8° |
| 2027-03-27 Sat | 63 | — | unknown | 01:05–05:40 (good, 3.58 h) | 87.1° 07:35 | 8.37 | 70% | 70.7° |
| 2027-03-28 Sun | 74 | — | unknown | 01:40–05:40 (good, 4.0 h) | 87.1° 07:35 | 8.31 | 60% | 67.5° |
| 2027-03-29 Mon | 84 | — | unknown | 01:35–05:35 (good, 4.0 h) | 87.1° 07:30 | 8.26 | 51% | 65.4° |
| 2027-03-30 Tue | 94 | — | unknown | 01:30–05:35 (good, 4.08 h) | 87.1° 07:25 | 8.2 | 42% | 64.4° |
| 2027-03-31 Wed | 98 | — | unknown | 01:25–05:30 (good, 4.08 h) | 87.1° 07:20 | 8.15 | 32% | 64.5° |
| 2027-04-01 Thu | 100 | — | unknown | 01:25–05:30 (good, 4.08 h) | 87.1° 07:20 | 8.1 | 24% | 65.8° |
| 2027-04-02 Fri | 100 | — | unknown | 01:20–05:30 (good, 4.17 h) | 87.1° 07:15 | 8.04 | 16% | 68.2° |
| 2027-04-03 Sat | 100 | — | unknown | 01:15–05:25 (good, 4.17 h) | 87.1° 07:10 | 7.99 | 10% | 71.7° |
| 2027-04-04 Sun | 100 | — | unknown | 01:10–05:25 (good, 4.25 h) | 87.1° 07:05 | 7.93 | 5% | 76.0° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2027-03-06&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.