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.

2032-10-03astronomy score per night — click a bar for that night2032-11-01

night of	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-10-03 Sun	—	unknown	—	50.2° 13:00	9.3	0%	7.3°
2032-10-04 Mon	—	unknown	—	50.2° 12:55	9.35	0%	12.0°
2032-10-05 Tue	—	unknown	—	50.2° 12:55	9.39	2%	23.1°
2032-10-06 Wed	—	unknown	—	50.2° 12:50	9.44	5%	35.1°
2032-10-07 Thu	—	unknown	—	50.2° 12:45	9.49	11%	47.5°
2032-10-08 Fri	—	unknown	—	50.2° 12:40	9.53	18%	60.2°
2032-10-09 Sat	—	unknown	—	50.2° 12:40	9.58	27%	73.1°
2032-10-10 Sun	—	unknown	—	50.2° 12:35	9.62	37%	86.3°
2032-10-11 Mon	—	unknown	—	50.2° 12:30	9.67	47%	99.7°
2032-10-12 Tue	—	unknown	—	50.2° 12:25	9.71	59%	113.5°
2032-10-13 Wed	—	unknown	—	50.2° 12:20	9.76	70%	127.5°
2032-10-14 Thu	—	unknown	—	50.2° 12:20	9.8	80%	141.8°
2032-10-15 Fri	—	unknown	—	50.2° 12:15	9.84	88%	156.1°
2032-10-16 Sat	—	unknown	—	50.2° 12:10	9.89	95%	169.3°
2032-10-17 Sun	—	unknown	—	50.2° 12:05	9.93	99%	170.3°
2032-10-18 Mon	—	unknown	—	50.2° 12:00	9.97	100%	157.5°
2032-10-19 Tue	—	unknown	—	50.2° 11:55	10.01	98%	143.5°
2032-10-20 Wed	—	unknown	—	50.2° 11:50	10.06	94%	129.6°
2032-10-21 Thu	—	unknown	—	50.2° 11:45	10.1	88%	116.0°
2032-10-22 Fri	—	unknown	—	50.2° 11:45	10.14	80%	102.8°
2032-10-23 Sat	—	unknown	—	50.2° 11:40	10.18	71%	90.1°
2032-10-24 Sun	—	unknown	—	50.2° 11:35	10.22	62%	77.7°
2032-10-25 Mon	—	unknown	—	50.2° 11:30	10.26	52%	65.6°
2032-10-26 Tue	—	unknown	—	50.2° 11:25	10.3	42%	53.7°
2032-10-27 Wed	—	unknown	—	50.2° 11:25	10.34	33%	42.0°
2032-10-28 Thu	—	unknown	—	50.2° 11:20	10.37	24%	30.4°
2032-10-29 Fri	—	unknown	—	50.2° 11:15	10.41	17%	19.1°
2032-10-30 Sat	—	unknown	—	50.2° 10:10	10.45	10%	9.1°
2032-10-31 Sun	—	unknown	—	50.2° 10:05	10.49	5%	9.3°
2032-11-01 Mon	—	unknown	—	50.2° 10:05	10.52	2%	19.7°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-10-03&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.