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: 11-23 (100), 11-24 (100), 11-25 (100), 11-26 (100), 11-27 (100) — by astronomy; check the weather when the night is within four days.

2032-11-23astronomy score per night — click a bar for that night2032-12-22

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-11-23 Tue	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.3° 17:10	11.18	60%	125.5°
2032-11-24 Wed	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.3° 17:05	11.2	50%	126.7°
2032-11-25 Thu	100	—	unknown	18:35–23:20 (good, 4.75 h)	87.3° 17:00	11.22	41%	126.1°
2032-11-26 Fri	100	—	unknown	18:35–23:15 (good, 4.67 h)	87.3° 16:55	11.25	32%	123.8°
2032-11-27 Sat	100	—	unknown	18:35–23:15 (good, 4.67 h)	87.3° 16:55	11.27	23%	119.9°
2032-11-28 Sun	100	—	unknown	18:35–23:10 (good, 4.58 h)	87.3° 16:50	11.29	16%	114.7°
2032-11-29 Mon	100	—	unknown	18:35–23:05 (good, 4.5 h)	87.3° 16:45	11.3	9%	108.4°
2032-11-30 Tue	100	—	unknown	18:35–23:00 (good, 4.42 h)	87.3° 16:40	11.32	4%	101.3°
2032-12-01 Wed	100	—	unknown	18:35–22:55 (good, 4.33 h)	87.3° 16:35	11.34	1%	93.7°
2032-12-02 Thu	100	—	unknown	18:35–22:55 (good, 4.33 h)	87.3° 16:35	11.36	0%	85.7°
2032-12-03 Fri	100	—	unknown	18:35–22:50 (good, 4.25 h)	87.3° 16:30	11.37	2%	77.8°
2032-12-04 Sat	100	—	unknown	18:35–22:45 (good, 4.17 h)	87.3° 16:25	11.39	5%	70.2°
2032-12-05 Sun	97	—	unknown	18:35–22:40 (good, 4.08 h)	87.3° 16:20	11.4	11%	63.4°
2032-12-06 Mon	92	—	unknown	18:35–22:35 (good, 4.0 h)	87.3° 16:15	11.41	20%	58.0°
2032-12-07 Tue	82	—	unknown	18:35–22:35 (good, 4.0 h)	87.3° 16:15	11.43	29%	54.5°
2032-12-08 Wed	67	—	unknown	18:35–22:10 (good, 3.58 h)	87.3° 16:10	11.44	40%	53.4°
2032-12-09 Thu	55	—	unknown	18:35–21:55 (good, 3.33 h)	87.3° 16:05	11.45	52%	54.8°
2032-12-10 Fri	45	—	unknown	18:35–20:30 (good, 1.92 h)	87.3° 16:00	11.46	63%	58.6°
2032-12-11 Sat	40	—	unknown	18:35–19:25 (good, 0.83 h)	87.3° 16:00	11.47	73%	64.2°
2032-12-12 Sun	38	—	unknown	18:35–19:15 (good, 0.67 h)	87.3° 15:55	11.48	82%	71.2°
2032-12-13 Mon	39	—	unknown	18:35–19:30 (good, 0.92 h)	87.3° 15:50	11.48	90%	78.8°
2032-12-14 Tue	43	—	unknown	18:35–20:00 (good, 1.42 h)	87.3° 15:45	11.49	96%	86.9°
2032-12-15 Wed	49	—	unknown	18:35–20:45 (good, 2.17 h)	87.3° 15:40	11.49	99%	94.9°
2032-12-16 Thu	57	—	unknown	18:35–21:25 (good, 2.83 h)	87.3° 15:40	11.5	100%	102.6°
2032-12-17 Fri	64	—	unknown	18:35–21:30 (good, 2.92 h)	87.3° 15:35	11.5	99%	109.7°
2032-12-18 Sat	76	—	unknown	18:35–21:35 (good, 3.0 h)	87.3° 15:30	11.5	95%	115.9°
2032-12-19 Sun	78	—	unknown	18:35–21:35 (good, 3.0 h)	87.3° 15:25	11.51	90%	120.9°
2032-12-20 Mon	78	—	unknown	18:35–21:35 (good, 3.0 h)	87.3° 15:20	11.51	84%	124.5°
2032-12-21 Tue	77	—	unknown	18:35–21:40 (good, 3.08 h)	87.3° 15:20	11.51	76%	126.3°
2032-12-22 Wed	76	—	unknown	18:35–21:35 (good, 3.0 h)	87.3° 15:15	11.51	68%	126.3°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-11-23&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.