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 Vega: 10-24 (97), 10-23 (96), 10-22 (95), 10-25 (95), 10-26 (95) — by astronomy; check the weather when the night is within four days.

2032-10-19astronomy score per night — click a bar for that night2032-11-17

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-10-19 Tue	68	—	unknown	20:10–23:35 (good, 3.42 h)	87.1° 18:05	10.01	98%	103.3°
2032-10-20 Wed	78	—	unknown	20:05–23:40 (good, 3.58 h)	87.1° 18:00	10.06	94%	110.2°
2032-10-21 Thu	92	—	unknown	20:05–23:45 (good, 3.67 h)	87.1° 17:55	10.1	88%	116.0°
2032-10-22 Fri	95	—	unknown	20:05–23:45 (good, 3.67 h)	87.1° 17:55	10.14	80%	120.2°
2032-10-23 Sat	96	—	unknown	20:05–23:40 (good, 3.58 h)	87.1° 17:50	10.18	71%	122.7°
2032-10-24 Sun	97	—	unknown	20:00–23:40 (good, 3.67 h)	87.1° 17:45	10.22	62%	123.4°
2032-10-25 Mon	95	—	unknown	20:00–23:40 (good, 3.67 h)	87.1° 17:40	10.26	52%	122.4°
2032-10-26 Tue	95	—	unknown	20:00–23:35 (good, 3.58 h)	87.1° 17:35	10.3	42%	119.8°
2032-10-27 Wed	93	—	unknown	20:00–23:30 (good, 3.5 h)	87.1° 17:35	10.34	33%	115.9°
2032-10-28 Thu	93	—	unknown	19:55–23:30 (good, 3.58 h)	87.1° 17:30	10.37	24%	111.1°
2032-10-29 Fri	91	—	unknown	19:55–23:25 (good, 3.5 h)	87.1° 17:25	10.41	17%	105.5°
2032-10-30 Sat	90	—	unknown	19:55–23:20 (good, 3.42 h)	87.1° 17:20	10.45	10%	99.3°
2032-10-31 Sun	89	—	unknown	18:55–22:15 (good, 3.33 h)	87.1° 16:15	10.49	5%	92.7°
2032-11-01 Mon	89	—	unknown	18:50–22:15 (good, 3.42 h)	87.1° 16:15	10.52	2%	86.0°
2032-11-02 Tue	86	—	unknown	18:50–22:10 (good, 3.33 h)	87.1° 16:10	10.56	0%	79.2°
2032-11-03 Wed	85	—	unknown	18:50–22:05 (good, 3.25 h)	87.1° 16:05	10.59	0%	72.8°
2032-11-04 Thu	84	—	unknown	18:50–22:00 (good, 3.17 h)	87.1° 16:00	10.63	3%	66.9°
2032-11-05 Fri	81	—	unknown	18:50–21:55 (good, 3.08 h)	87.1° 16:00	10.66	8%	62.0°
2032-11-06 Sat	75	—	unknown	18:45–21:55 (good, 3.17 h)	87.1° 15:55	10.7	14%	58.4°
2032-11-07 Sun	68	—	unknown	18:45–21:50 (good, 3.08 h)	87.1° 15:50	10.73	23%	56.7°
2032-11-08 Mon	59	—	unknown	18:45–21:35 (good, 2.83 h)	87.1° 15:45	10.76	33%	57.1°
2032-11-09 Tue	50	—	unknown	18:45–21:25 (good, 2.67 h)	87.1° 15:40	10.79	44%	59.6°
2032-11-10 Wed	43	—	unknown	18:45–21:10 (good, 2.42 h)	87.1° 15:40	10.83	55%	64.0°
2032-11-11 Thu	38	—	unknown	18:40–20:35 (good, 1.92 h)	87.1° 15:35	10.86	66%	70.0°
2032-11-12 Fri	35	—	unknown	18:40–20:00 (good, 1.33 h)	87.1° 15:30	10.89	77%	77.0°
2032-11-13 Sat	34	—	unknown	18:40–19:55 (good, 1.25 h)	87.1° 15:25	10.92	86%	84.6°
2032-11-14 Sun	37	—	unknown	18:40–20:10 (good, 1.5 h)	87.1° 15:20	10.95	93%	92.5°
2032-11-15 Mon	40	—	unknown	18:40–20:40 (good, 2.0 h)	87.1° 15:20	10.97	98%	100.3°
2032-11-16 Tue	44	—	unknown	18:40–20:50 (good, 2.17 h)	87.1° 15:15	11.0	100%	107.4°
2032-11-17 Wed	48	—	unknown	18:40–20:50 (good, 2.17 h)	87.1° 15:10	11.03	99%	113.7°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-10-19&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.