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 HD 189733: 11-06 (89), 11-07 (79), 11-19 (72), 11-20 (72), 11-21 (72) — by astronomy; check the weather when the night is within four days.

2032-11-06astronomy score per night — click a bar for that night2032-12-05

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-11-06 Sat	89	—	unknown	18:45–22:25 (good, 3.67 h)	71.1° 17:20	10.7	14%	51.4°
2032-11-07 Sun	79	—	unknown	18:45–22:20 (good, 3.58 h)	71.1° 17:15	10.73	23%	43.6°
2032-11-08 Mon	67	—	unknown	18:45–22:15 (good, 3.5 h)	71.1° 17:10	10.76	33%	38.4°
2032-11-09 Tue	53	—	unknown	18:45–21:55 (good, 3.17 h)	71.1° 17:05	10.79	44%	37.0°
2032-11-10 Wed	42	—	unknown	18:45–21:00 (good, 2.25 h)	71.1° 17:00	10.83	55%	40.0°
2032-11-11 Thu	35	—	unknown	18:40–19:25 (good, 0.75 h)	71.1° 17:00	10.86	66%	46.7°
2032-11-12 Fri	32	—	unknown	18:40–18:50 (good, 0.17 h)	71.1° 16:55	10.89	77%	55.7°
2032-11-13 Sat	32	—	unknown	18:40–19:00 (good, 0.33 h)	71.1° 16:50	10.92	86%	66.1°
2032-11-14 Sun	35	—	unknown	18:40–19:30 (good, 0.83 h)	71.1° 16:45	10.95	93%	77.2°
2032-11-15 Mon	41	—	unknown	18:40–20:15 (good, 1.58 h)	71.1° 16:40	10.97	98%	88.6°
2032-11-16 Tue	49	—	unknown	18:40–21:10 (good, 2.5 h)	71.1° 16:40	11.0	100%	99.9°
2032-11-17 Wed	57	—	unknown	18:40–21:20 (good, 2.67 h)	71.1° 16:35	11.03	99%	110.7°
2032-11-18 Thu	65	—	unknown	18:35–21:25 (good, 2.83 h)	71.1° 16:30	11.06	97%	120.8°
2032-11-19 Fri	72	—	unknown	18:35–21:25 (good, 2.83 h)	71.1° 16:25	11.08	92%	129.7°
2032-11-20 Sat	72	—	unknown	18:35–21:20 (good, 2.75 h)	71.1° 16:25	11.11	85%	136.8°
2032-11-21 Sun	72	—	unknown	18:35–21:20 (good, 2.75 h)	71.1° 16:20	11.13	78%	141.5°
2032-11-22 Mon	72	—	unknown	18:35–21:20 (good, 2.75 h)	71.1° 16:15	11.16	69%	143.0°
2032-11-23 Tue	70	—	unknown	18:35–21:15 (good, 2.67 h)	71.1° 16:10	11.18	60%	141.1°
2032-11-24 Wed	68	—	unknown	18:35–21:15 (good, 2.67 h)	71.1° 16:05	11.2	50%	136.5°
2032-11-25 Thu	66	—	unknown	18:35–21:10 (good, 2.58 h)	71.1° 16:05	11.22	41%	129.9°
2032-11-26 Fri	64	—	unknown	18:35–21:05 (good, 2.5 h)	71.1° 16:00	11.25	32%	122.0°
2032-11-27 Sat	63	—	unknown	18:35–21:00 (good, 2.42 h)	71.1° 15:55	11.27	23%	113.3°
2032-11-28 Sun	61	—	unknown	18:35–20:55 (good, 2.33 h)	71.1° 15:50	11.29	16%	103.9°
2032-11-29 Mon	59	—	unknown	18:35–20:55 (good, 2.33 h)	71.1° 15:45	11.3	9%	94.0°
2032-11-30 Tue	57	—	unknown	18:35–20:50 (good, 2.25 h)	71.1° 15:45	11.32	4%	83.9°
2032-12-01 Wed	56	—	unknown	18:35–20:45 (good, 2.17 h)	71.1° 15:40	11.34	1%	73.7°
2032-12-02 Thu	54	—	unknown	18:35–20:40 (good, 2.08 h)	71.1° 15:35	11.36	0%	63.5°
2032-12-03 Fri	52	—	unknown	18:35–20:40 (good, 2.08 h)	71.1° 15:30	11.37	2%	53.9°
2032-12-04 Sat	50	—	unknown	18:35–20:35 (good, 2.0 h)	71.1° 15:30	11.39	5%	45.6°
2032-12-05 Sun	45	—	unknown	18:35–20:30 (good, 1.92 h)	71.1° 15:25	11.4	11%	39.5°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-11-06&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.