IT Consulting

← single night · whole-night plan

Rozhen Observation Calendar

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.

Best nights for V1057 Cyg: 09-30 (100), 10-01 (100), 10-02 (100), 10-03 (100), 10-04 (100) — by astronomy; check the weather when the night is within four days.
2037-09-30astronomy score per night — click a bar for that night2037-10-29
night ofastronomyweatheroverall best windowhighestdark hMoonMoon sep.
2037-09-30 Wed 100 — unknown 20:40–03:40 (good, 7.0 h) 87.3° 21:40 9.15 66% 98.2°
2037-10-01 Thu 100 — unknown 20:35–03:45 (good, 7.17 h) 87.3° 21:40 9.2 55% 104.1°
2037-10-02 Fri 100 — unknown 20:35–03:45 (good, 7.17 h) 87.3° 21:35 9.24 45% 109.5°
2037-10-03 Sat 100 — unknown 20:35–03:45 (good, 7.17 h) 87.3° 21:30 9.29 34% 114.1°
2037-10-04 Sun 100 — unknown 20:30–03:45 (good, 7.25 h) 87.3° 21:25 9.34 24% 117.5°
2037-10-05 Mon 100 — unknown 20:30–03:40 (good, 7.17 h) 87.3° 21:20 9.38 15% 119.2°
2037-10-06 Tue 100 — unknown 20:30–03:40 (good, 7.17 h) 87.3° 21:20 9.43 7% 118.8°
2037-10-07 Wed 100 — unknown 20:25–03:35 (good, 7.17 h) 87.3° 21:15 9.48 2% 116.3°
2037-10-08 Thu 100 — unknown 20:25–03:30 (good, 7.08 h) 87.3° 21:10 9.52 0% 111.9°
2037-10-09 Fri 100 — unknown 20:25–03:25 (good, 7.0 h) 87.3° 21:05 9.57 1% 106.1°
2037-10-10 Sat 100 — unknown 20:20–03:20 (good, 7.0 h) 87.2° 21:05 9.61 5% 99.5°
2037-10-11 Sun 100 — unknown 20:20–03:20 (good, 7.0 h) 87.3° 21:00 9.66 11% 92.5°
2037-10-12 Mon 100 — unknown 20:20–03:15 (good, 6.92 h) 87.3° 20:55 9.7 20% 85.6°
2037-10-13 Tue 100 — unknown 20:15–03:10 (good, 6.92 h) 87.3° 20:50 9.75 29% 79.1°
2037-10-14 Wed 100 — unknown 20:15–03:05 (good, 6.83 h) 87.3° 20:45 9.79 39% 73.4°
2037-10-15 Thu 97 — unknown 20:15–03:05 (good, 6.83 h) 87.3° 20:45 9.84 49% 68.5°
2037-10-16 Fri 91 — unknown 20:15–03:00 (good, 6.75 h) 87.3° 20:40 9.88 59% 64.7°
2037-10-17 Sat 84 — unknown 20:10–02:55 (good, 6.75 h) 87.3° 20:35 9.92 68% 62.1°
2037-10-18 Sun 67 — unknown 20:10–02:20 (good, 6.17 h) 87.3° 20:30 9.96 77% 60.9°
2037-10-19 Mon 64 — unknown 20:10–23:50 (good, 3.67 h) 87.3° 20:25 10.01 84% 61.0°
2037-10-20 Tue 63 — unknown 20:05–21:05 (good, 1.0 h) 87.3° 20:25 10.05 90% 62.5°
2037-10-21 Wed 62 — unknown 20:05–21:00 (good, 0.92 h) 87.3° 20:20 10.09 95% 65.2°
2037-10-22 Thu 64 — unknown 20:05–21:30 (good, 1.42 h) 87.3° 20:15 10.13 98% 69.0°
2037-10-23 Fri 69 — unknown 20:05–22:25 (good, 2.33 h) 87.3° 20:10 10.17 100% 73.6°
2037-10-24 Sat 74 — unknown 20:00–23:20 (good, 3.33 h) 87.2° 20:10 10.21 99% 78.8°
2037-10-25 Sun 78 — unknown 19:00–23:00 (good, 4.0 h) 87.3° 19:05 10.25 97% 84.5°
2037-10-26 Mon 100 — unknown 19:00–23:50 (good, 4.83 h) 87.3° 19:00 10.29 93% 90.5°
2037-10-27 Tue 100 — unknown 19:00–00:40 (good, 5.67 h) 87.3° 18:55 10.33 87% 96.6°
2037-10-28 Wed 100 — unknown 18:55–00:50 (good, 5.92 h) 87.3° 18:50 10.37 79% 102.5°
2037-10-29 Thu 100 — unknown 18:55–00:50 (good, 5.92 h) 87.3° 18:50 10.4 70% 107.9°

Download: CSV · JSON

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2037-09-30&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csv

One 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.